swift remove TextField borders - ios

I have a textField in an alert.
I've configured its borderStyle like that:
textField.borderStyle = .roundedRect
But there's still another rect border around the first one as you can see:
I'd like to remove it by code but I don't find any options or what to do it.
Here is the alert code:
private func presentUsernameAlert() {
let alert = UIAlertController(title: nil, message: "Alors ?", preferredStyle: .alert)
alert.addTextField(configurationHandler: newUsername)
alert.addAction(UIAlertAction(title: "Annuler", style: .default, handler: nil))
alert.addAction(UIAlertAction(title: "Confirmer", style: .default, handler: nil))
present(alert, animated: true, completion: nil)
}
private func newUsername(textField: UITextField) {
usernameTextField = textField
usernameTextField?.borderStyle = .roundedRect
usernameTextField?.keyboardAppearance = .dark
usernameTextField?.placeholder = "Nouveau pseudo"
}
then I call presentUsernameAlert()


Using this property open var textFields: [UITextField]? { get } of AlertViewController, after visual debugging I saw that we need to remove the superView.superView.subView in 0, and change the TextField.superView background to clear fix the issue.
Try this code:
private func presentUsernameAlert() {
let alert = UIAlertController(title: nil, message: "Alors ?", preferredStyle: .alert)
alert.addTextField(configurationHandler: newUsername)
alert.addAction(UIAlertAction(title: "Annuler", style: .default, handler: nil))
alert.addAction(UIAlertAction(title: "Confirmer", style: .default, handler: nil))
present(alert, animated: true) {
}
if let textFields = alert.textFields {
if textFields.count > 0{
textFields[0].superview!.superview!.subviews[0].removeFromSuperview()
textFields[0].superview!.backgroundColor = UIColor.clear
}
}
}
What it should end up looking like:

Related

UIAlertController textfield not getting input

I am trying to code, an UIAlertController that gets input from the user through a UITextfield.
When i run the print statement nothing gets printed after i type something in the textfield and hit the save button.
#IBAction func reqTimeButton(_ sender: Any) {
// time is requested by student
timer.invalidate()
let alert = UIAlertController(title: "Time Request", message: "Please enter your reason to extend the time of your trip", preferredStyle: .alert)
alert.addTextField { (reason) in
reason.placeholder = "" }
alert.addAction(UIAlertAction(title: "Continue", style: .default, handler: { (action) in
let textField = alert.textFields![0]
textField.text = self.request
self.totalTime = self.totalTime + 480
self.initialTime = self.initialTime + 480
self.runTimer()
print(textField.text!) }))
alert.addAction(UIAlertAction(title: "Cancel", style: .default, handler: { (action) in
self.runTimer() }))
self.present(alert, animated: true, completion: nil)
}

Use this code to get the text from UITextField, I hope this helps you.
let alertController = UIAlertController(title: "Time Request", message: "Please enter your reason to extend the time of your trip", preferredStyle: .alert)
alertController.addTextField { (textField : UITextField!) -> Void in
textField.placeholder = "Enter your reason"
}
alertController.addAction(UIAlertAction(title: "Continue", style: .default, handler: { (okAction) in
let textField = alertController.textFields![0] as UITextField
print(textField)
}))
alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(alertController, animated: true, completion: nil)

i figured out what was wrong. This is the working code.
#IBAction func reqTimeButton(_ sender: Any) {
// time is requested by student
timer.invalidate()
let alert = UIAlertController(title: "Time Request", message: "Please enter your reason to extend the time of your trip", preferredStyle: .alert)
alert.addTextField { (reason) in
reason.placeholder = "" }
alert.addAction(UIAlertAction(title: "Continue", style: .default, handler: { (action) in
let textField = alert.textFields![0]
print(textField.text!)
self.totalTime = self.totalTime + 480
self.initialTime = self.initialTime + 480
self.runTimer()
self.request = textField.text!
print(self.request) }))
alert.addAction(UIAlertAction(title: "Cancel", style: .default, handler: { (action) in
self.runTimer() }))
self.present(alert, animated: true, completion: nil)
}

How to show alert after keyboard has been shown in UITextView textViewDidBeginEditing

Inside textViewDidBeginEditing I'm showing alert using UIAlertController. Alert is shown prior to the keyboard (on simulator).
How do I show keyboard before alert pops up?
func textViewDidBeginEditing(_ textView: UITextView) {
if self.balance <= 0 {
let alert = UIAlertController(title: "Balance Low", message: "Your balance is low.", preferredStyle: UIAlertControllerStyle.alert)
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel) { (cancel) in
}
let okAction = UIAlertAction(title: "Buy", style: UIAlertActionStyle.default) { (action) in
self.segueToBuy()
}
alert.addAction(cancelAction)
alert.addAction(okAction)
self.present(alert, animated: true, completion: nil)
}
}

Please use DispatchQueue.main.asyncAfter to show the alert after certain delay, whenever user typed the text in UITextView.
func asyncAfter(deadline: DispatchTime, qos: DispatchQoS = default, flags: DispatchWorkItemFlags = default, execute work: #escaping #convention(block) () -> Void)
Delcare private instance variable which is used to show alert, locally.
var showAlert = true
Try the code shown below in textViewDidBeginEditing:
func textViewDidBeginEditing(_ textView: UITextView) {
if self.showAlert && self.balance <= 0 {
DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
textView.endEditing(true)
let alert = UIAlertController(title: "Balance Low", message: "Your balance is low.", preferredStyle: UIAlertController.Style.alert)
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel) { (cancel) in
self.showAlert = false
textView.becomeFirstResponder()
}
let okAction = UIAlertAction(title: "Buy", style: UIAlertAction.Style.default) { (action) in
textView.endEditing(true)
self.segueToBuy()
}
alert.addAction(cancelAction)
alert.addAction(okAction)
self.present(alert, animated: true, completion: nil)
}
}
}

How to show selected action in UIAlertAction?

I am trying to achieve the view with a few green actions, and get the selected action to be bold in UIAlertController. And one of the actions, which is dismiss button has to be divided from others and be colored with red.
I am trying to add them with the styles .cancel allows to show dismiss button, but it is bold, but green.
How do I achieve this?
expected view:
my current code:
let alertController
= UIAlertController(title: nil,
message: nil,
preferredStyle: .actionSheet)
let sortByDateAction = UIAlertAction(title: "По дате",
style: .default,
handler: {(action: UIAlertAction!) in
if self.sortBy != "date" {
self.page = 1
self.sortBy = "date"
self.loadTenders()
}
})
let moreExpensiveSortAction = UIAlertAction(title: "Дороже",
style: .destructive,
handler: {(action: UIAlertAction!) in
if self.sortBy != "priceHigh" {
self.page = 1
self.sortBy = "priceHigh"
self.loadTenders()
}
})
let cheaperSortAction = UIAlertAction(title: "Дешевле",
style: .default,
handler: {(action: UIAlertAction!) in
if self.sortBy != "priceLow" {
self.page = 1
self.sortBy = "priceLow"
self.loadTenders()
}
})
alertController
.addAction(sortByDateAction)
alertController
.addAction(moreExpensiveSortAction)
alertController
.addAction(cheaperSortAction)
alertController.preferredAction = sortByDateAction
alertController
.addAction(UIAlertAction(title: "Dismiss",
style: .cancel,
handler: nil))

let cancelAlert = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler:nil)
cancelAlert.setValue(UIColor.red, forKey: "titleTextColor")
alertController.addAction(cancelAlert)
try this code.

The color of the text in the action sheet is nothing but the tint color of the view. Set this as per your color requirement.
Furthermore, To change the font color of cancel button: Set the value for the titleTextColor property of the UIAlertAction
Here is a sample code:
func showCaptureOptions() {
let actionSheet = UIAlertController(title: "Capture Type", message: "", preferredStyle: .actionSheet)
let cameraAction = UIAlertAction(title: "Camera", style: .default) { [weak self](action) in
self?.initializeImagePicker(captureType: .camera)
}
let photoLibraryAction = UIAlertAction(title: "Photo Library", style: .default) { [weak self](action) in
self?.initializeImagePicker(captureType: .photoLibrary)
}
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) { (action) in
}
cancelAction.setValue(UIColor.red, forKey: "titleTextColor"). /// The cancel button will be red
actionSheet.view.tintColor = UIColor.green /// The action sheet options would be green
actionSheet.addAction(cameraAction)
actionSheet.addAction(photoLibraryAction)
actionSheet.addAction(cancelAction)
DispatchQueue.main.async {
self.present(actionSheet, animated: true, completion: nil)
}
}

How to present iOS UIActionSheet in Swift?

How can I present a UIActionSheet in Swift within an iOS app?
Here is my code for displaying a UIActionSheet:
#IBAction func downloadSheet(sender: AnyObject) {
let optionMenu = UIAlertController(title: nil, message: "Choose Option", preferredStyle: .actionSheet)
let saveAction = UIAlertAction(title: "Save", style: .default, handler: {
(alert: UIAlertAction!) -> Void in
println("Saved")
})
let deleteAction = UIAlertAction(title: "Delete", style: .default, handler: {
(alert: UIAlertAction!) -> Void in
println("Deleted")
})
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: {
(alert: UIAlertAction!) -> Void in
println("Cancelled")
})
optionMenu.addAction(deleteAction)
optionMenu.addAction(saveAction)
optionMenu.addAction(cancelAction)
self.presentViewController(optionMenu, animated: true, completion: nil)
}

Updated for Swift 4/5
Works for iOS 11-14
Some of the other answers are okay but I ended up mixing and matching a few of them to rather come up with this :
#IBAction func showAlert(sender: AnyObject) {
let alert = UIAlertController(title: "Title", message: "Please Select an Option", preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Approve", style: .default , handler:{ (UIAlertAction)in
print("User click Approve button")
}))
alert.addAction(UIAlertAction(title: "Edit", style: .default , handler:{ (UIAlertAction)in
print("User click Edit button")
}))
alert.addAction(UIAlertAction(title: "Delete", style: .destructive , handler:{ (UIAlertAction)in
print("User click Delete button")
}))
alert.addAction(UIAlertAction(title: "Dismiss", style: .cancel, handler:{ (UIAlertAction)in
print("User click Dismiss button")
}))
//uncomment for iPad Support
//alert.popoverPresentationController?.sourceView = self.view
self.present(alert, animated: true, completion: {
print("completion block")
})
}
Enjoy :)

Your Approach is fine, but you can add UIActionSheet with other way with ease.
You can add UIActionSheetDelegate in UIViewController` like
class ViewController: UIViewController ,UIActionSheetDelegate
Set you method like,
#IBAction func downloadSheet(sender: AnyObject)
{
let actionSheet = UIActionSheet(title: "Choose Option", delegate: self, cancelButtonTitle: "Cancel", destructiveButtonTitle: nil, otherButtonTitles: "Save", "Delete")
actionSheet.showInView(self.view)
}
You can get your button index when it clicked like
func actionSheet(actionSheet: UIActionSheet, clickedButtonAtIndex buttonIndex: Int)
{
println("\(buttonIndex)")
switch (buttonIndex){
case 0:
println("Cancel")
case 1:
println("Save")
case 2:
println("Delete")
default:
println("Default")
//Some code here..
}
}
Update 1: for iOS8+
//Create the AlertController and add Its action like button in Actionsheet
let actionSheetControllerIOS8: UIAlertController = UIAlertController(title: "Please select", message: "Option to select", preferredStyle: .ActionSheet)
let cancelActionButton = UIAlertAction(title: "Cancel", style: .cancel) { _ in
print("Cancel")
}
actionSheetControllerIOS8.addAction(cancelActionButton)
let saveActionButton = UIAlertAction(title: "Save", style: .default)
{ _ in
print("Save")
}
actionSheetControllerIOS8.addAction(saveActionButton)
let deleteActionButton = UIAlertAction(title: "Delete", style: .default)
{ _ in
print("Delete")
}
actionSheetControllerIOS8.addAction(deleteActionButton)
self.present(actionSheetControllerIOS8, animated: true, completion: nil)

UIActionSheet is deprecated in iOS 8.
I am using following:
// Create the AlertController
let actionSheetController = UIAlertController(title: "Please select", message: "How you would like to utilize the app?", preferredStyle: .ActionSheet)
// Create and add the Cancel action
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) { action -> Void in
// Just dismiss the action sheet
}
actionSheetController.addAction(cancelAction)
// Create and add first option action
let takePictureAction = UIAlertAction(title: "Consumer", style: .Default) { action -> Void in
self.performSegueWithIdentifier("segue_setup_customer", sender: self)
}
actionSheetController.addAction(takePictureAction)
// Create and add a second option action
let choosePictureAction = UIAlertAction(title: "Service provider", style: .Default) { action -> Void in
self.performSegueWithIdentifier("segue_setup_provider", sender: self)
}
actionSheetController.addAction(choosePictureAction)
// We need to provide a popover sourceView when using it on iPad
actionSheetController.popoverPresentationController?.sourceView = sender as UIView
// Present the AlertController
self.presentViewController(actionSheetController, animated: true, completion: nil)

Updated for Swift 3.x, Swift 4.x, Swift 5.x
// create an actionSheet
let actionSheetController: UIAlertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
// create an action
let firstAction: UIAlertAction = UIAlertAction(title: "First Action", style: .default) { action -> Void in
print("First Action pressed")
}
let secondAction: UIAlertAction = UIAlertAction(title: "Second Action", style: .default) { action -> Void in
print("Second Action pressed")
}
let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel", style: .cancel) { action -> Void in }
// add actions
actionSheetController.addAction(firstAction)
actionSheetController.addAction(secondAction)
actionSheetController.addAction(cancelAction)
// present an actionSheet...
// present(actionSheetController, animated: true, completion: nil) // doesn't work for iPad
actionSheetController.popoverPresentationController?.sourceView = yourSourceViewName // works for both iPhone & iPad
present(actionSheetController, animated: true) {
print("option menu presented")
}

Update for Swift 3:
// Create the AlertController and add its actions like button in ActionSheet
let actionSheetController = UIAlertController(title: "Please select", message: "Option to select", preferredStyle: .actionSheet)
let cancelActionButton = UIAlertAction(title: "Cancel", style: .cancel) { action -> Void in
print("Cancel")
}
actionSheetController.addAction(cancelActionButton)
let saveActionButton = UIAlertAction(title: "Save", style: .default) { action -> Void in
print("Save")
}
actionSheetController.addAction(saveActionButton)
let deleteActionButton = UIAlertAction(title: "Delete", style: .default) { action -> Void in
print("Delete")
}
actionSheetController.addAction(deleteActionButton)
self.present(actionSheetController, animated: true, completion: nil)

Generetic Action Sheet working for Swift 4, 4.2, 5
If you like a generic version that you can call from every ViewController and in every project try this one:
class Alerts {
static func showActionsheet(viewController: UIViewController, title: String, message: String, actions: [(String, UIAlertActionStyle)], completion: #escaping (_ index: Int) -> Void) {
let alertViewController = UIAlertController(title: title, message: message, preferredStyle: .actionSheet)
for (index, (title, style)) in actions.enumerated() {
let alertAction = UIAlertAction(title: title, style: style) { (_) in
completion(index)
}
alertViewController.addAction(alertAction)
}
// iPad Support
alertViewController.popoverPresentationController?.sourceView = viewController.view
viewController.present(alertViewController, animated: true, completion: nil)
}
}
Call like this in your ViewController.
var actions: [(String, UIAlertActionStyle)] = []
actions.append(("Action 1", UIAlertActionStyle.default))
actions.append(("Action 2", UIAlertActionStyle.destructive))
actions.append(("Action 3", UIAlertActionStyle.cancel))
//self = ViewController
Alerts.showActionsheet(viewController: self, title: "D_My ActionTitle", message: "General Message in Action Sheet", actions: actions) { (index) in
print("call action \(index)")
/*
results
call action 0
call action 1
call action 2
*/
}
Attention: Maybe you're wondering why I add Action 1/2/3 but got results like 0,1,2. In the line for (index, (title, style)) in actions.enumerated() I get the index of actions. Arrays always begin with the index 0. So the completion is 0,1,2.
If you like to set a enum, an id or another identifier I would recommend to hand over an object in parameter actions.

Action Sheet in iOS10 with Swift3.0. Follow this link.
#IBAction func ShowActionSheet(_ sender: UIButton) {
// Create An UIAlertController with Action Sheet
let optionMenuController = UIAlertController(title: nil, message: "Choose Option from Action Sheet", preferredStyle: .actionSheet)
// Create UIAlertAction for UIAlertController
let addAction = UIAlertAction(title: "Add", style: .default, handler: {
(alert: UIAlertAction!) -> Void in
print("File has been Add")
})
let saveAction = UIAlertAction(title: "Edit", style: .default, handler: {
(alert: UIAlertAction!) -> Void in
print("File has been Edit")
})
let deleteAction = UIAlertAction(title: "Delete", style: .default, handler: {
(alert: UIAlertAction!) -> Void in
print("File has been Delete")
})
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: {
(alert: UIAlertAction!) -> Void in
print("Cancel")
})
// Add UIAlertAction in UIAlertController
optionMenuController.addAction(addAction)
optionMenuController.addAction(saveAction)
optionMenuController.addAction(deleteAction)
optionMenuController.addAction(cancelAction)
// Present UIAlertController with Action Sheet
self.present(optionMenuController, animated: true, completion: nil)
}

2022 Swift 5
func yourActionSheet() -> UIAlertController {
let alert = UIAlertController(title: "Your title",
message: nil,
preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Your action 1",
style: .default) { _ in
// onAction1()
})
alert.addAction(UIAlertAction(title: "Your action 2",
style: .default) { _ in
// onAction2()
})
alert.addAction(UIAlertAction(title: "Your cancel action",
style: .cancel) { _ in
// onCancel
})
return alert
}

SWIFT 4
WORKS ON IPHONE AND IPAD BOTH. ALSO ALLOWS ROTATION
LANDSCAPE
PORTRAIT
Code (tested)
let alert = UIAlertController()
let width: Int = Int(UIScreen.main.bounds.width - 100)
let viewAction = UIAlertAction(title: "View", style: .default , handler:{ (UIAlertAction)in
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let orderDetailVC = storyboard.instantiateViewController(withIdentifier: "orderDetail") as! OrderDetailTableViewController
orderDetailVC.orderId = self.myDraftOrders[indexPath.row]["id"].intValue
self.navigationController?.pushViewController(orderDetailVC, animated: true)
})
viewAction.setValue(appGreenColor, forKey: "titleTextColor")
alert.addAction(viewAction)
let modifyAction = UIAlertAction(title: "Modify", style: .default, handler:{ (UIAlertAction)in
showAlert("Coming soon...")
})
modifyAction.setValue(appCyanColor, forKey: "titleTextColor")
alert.addAction(modifyAction)
let copyAction = UIAlertAction(title: "Copy", style: .default, handler:{ (UIAlertAction)in
self.copyOrder(orderId: self.myDraftOrders[indexPath.row]["id"].intValue)
})
copyAction.setValue(appBlueColor, forKey: "titleTextColor")
alert.addAction(copyAction)
alert.addAction(UIAlertAction(title: "Delete", style: .destructive , handler:{ (UIAlertAction)in
self.deleteOrder(orderId: self.myDraftOrders[indexPath.row]["id"].intValue, indexPath: indexPath)
}))
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler:{ (UIAlertAction)in
print("User click Dismiss button")
}))
let popover = alert.popoverPresentationController
popover?.delegate = self
let cellT = tableView.cellForRow(at: indexPath)
popover?.sourceView = cellT
popover?.sourceRect = CGRect(x: width, y: 25, width: 100, height: 50)
present(alert, animated: true)

Swift :
The sample code given below works both on iPhone and iPad.
guard let viewRect = sender as? UIView else {
return
}
let cameraSettingsAlert = UIAlertController(title: NSLocalizedString("Please choose a course", comment: ""), message: NSLocalizedString("", comment: ""), preferredStyle: .ActionSheet)
cameraSettingsAlert.modalPresentationStyle = .Popover
let photoResolutionAction = UIAlertAction(title: NSLocalizedString("Photo Resolution", comment: ""), style: .Default) { action in
}
let cameraOrientationAction = UIAlertAction(title: NSLocalizedString("Camera Orientation", comment: ""), style: .Default) { action in
}
let flashModeAction = UIAlertAction(title: NSLocalizedString("Flash Mode", comment: ""), style: .Default) { action in
}
let timeStampOnPhotoAction = UIAlertAction(title: NSLocalizedString("Time Stamp on Photo", comment: ""), style: .Default) { action in
}
let cancel = UIAlertAction(title: NSLocalizedString("Cancel", comment: ""), style: .Cancel) { action in
}
cameraSettingsAlert.addAction(cancel)
cameraSettingsAlert.addAction(cameraOrientationAction)
cameraSettingsAlert.addAction(flashModeAction)
cameraSettingsAlert.addAction(timeStampOnPhotoAction)
cameraSettingsAlert.addAction(photoResolutionAction)
if let presenter = cameraSettingsAlert.popoverPresentationController {
presenter.sourceView = viewRect;
presenter.sourceRect = viewRect.bounds;
}
presentViewController(cameraSettingsAlert, animated: true, completion: nil)

The Old Way: UIActionSheet
let actionSheet = UIActionSheet(title: "Takes the appearance of the bottom bar if specified; otherwise, same as UIActionSheetStyleDefault.", delegate: self, cancelButtonTitle: "Cancel", destructiveButtonTitle: "Destroy", otherButtonTitles: "OK")
actionSheet.actionSheetStyle = .Default
actionSheet.showInView(self.view)
// MARK: UIActionSheetDelegate
func actionSheet(actionSheet: UIActionSheet, clickedButtonAtIndex buttonIndex: Int) {
switch buttonIndex {
...
}
}
The New Way: UIAlertController
let alertController = UIAlertController(title: nil, message: "Takes the appearance of the bottom bar if specified; otherwise, same as UIActionSheetStyleDefault.", preferredStyle: .ActionSheet)
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) { (action) in
// ...
}
alertController.addAction(cancelAction)
let OKAction = UIAlertAction(title: "OK", style: .Default) { (action) in
// ...
}
alertController.addAction(OKAction)
let destroyAction = UIAlertAction(title: "Destroy", style: .Destructive) { (action) in
println(action)
}
alertController.addAction(destroyAction)
self.presentViewController(alertController, animated: true) {
// ...
}

Swift 3
For displaying UIAlertController from UIBarButtonItem on iPad
let alert = UIAlertController(title: "Title", message: "Please Select an Option", preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Approve", style: .default , handler:{ (UIAlertAction)in
print("User click Approve button")
}))
alert.addAction(UIAlertAction(title: "Edit", style: .default , handler:{ (UIAlertAction)in
print("User click Edit button")
}))
alert.addAction(UIAlertAction(title: "Delete", style: .destructive , handler:{ (UIAlertAction)in
print("User click Delete button")
}))
alert.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.cancel, handler:{ (UIAlertAction)in
print("User click Dismiss button")
}))
if let presenter = alert.popoverPresentationController {
presenter.barButtonItem = sender
}
self.present(alert, animated: true, completion: {
print("completion block")
})

swift4 (tested)
let alertController = UIAlertController(title: "Select Photo", message: "Select atleast one photo", preferredStyle: .actionSheet)
let action1 = UIAlertAction(title: "From Photo", style: .default) { (action) in
print("Default is pressed.....")
}
let action2 = UIAlertAction(title: "Cancel", style: .cancel) { (action) in
print("Cancel is pressed......")
}
let action3 = UIAlertAction(title: "Click new", style: .default) { (action) in
print("Destructive is pressed....")
}
alertController.addAction(action1)
alertController.addAction(action2)
alertController.addAction(action3)
self.present(alertController, animated: true, completion: nil)
}

Code for adding alerts to actionsheet in swift4
*That means when we click actionsheet values(like edit/ delete..so on) it shows
an alert option that is set with Yes or No option*
class ViewController: UIViewController
{
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
#IBAction func action_sheet1(_ sender: Any) {
let action_sheet1 = UIAlertController(title: "Hi Bro", message: "Please Select an Option: ", preferredStyle: .actionSheet)
action_sheet1.addAction(UIAlertAction(title: "Approve", style: .default , handler:{ (alert: UIAlertAction!) -> Void in
print("User click Approve button")
let alert = UIAlertController(title: "Approve", message: "Would you like to approve the file ", preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Yes", style: UIAlertAction.Style.default, handler: nil))
alert.addAction(UIAlertAction(title: "No", style: UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)
}))
action_sheet1.addAction(UIAlertAction(title: "Edit", style: .default , handler:{ (alert: UIAlertAction!) -> Void in
print("User click Edit button")
let alert = UIAlertController(title: "Edit", message: "Would you like to edit the file ", preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Yes", style: UIAlertAction.Style.default, handler: nil))
alert.addAction(UIAlertAction(title: "No", style: UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)
}))
action_sheet1.addAction(UIAlertAction(title: "Delete", style: .destructive , handler: { (alert: UIAlertAction!) -> Void in
print("User click Delete button")
let alert = UIAlertController(title: "Delete", message: "Would you like to delete the file permenently?", preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Yes", style: UIAlertAction.Style.default, handler: nil))
alert.addAction(UIAlertAction(title: "No", style: UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)
}))
action_sheet1.addAction(UIAlertAction(title: "cancel", style: .cancel, handler:{ (alert: UIAlertAction!) -> Void in
print("User click cancel button")
let alert = UIAlertController(title: "Cancel", message: "Would you like to cancel?", preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Yes", style: UIAlertAction.Style.default, handler: nil))
alert.addAction(UIAlertAction(title: "No", style: UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)
}))
self.present(action_sheet1, animated: true, completion: {
print("completion block")
})
}
}

Useful to populate dynamic actions list, and listen to selected action:
var categories = ["Science", "History", "Industry", "Agriculture"]
var handlerSelectedCategory: ((Int) -> ())?
func prepareActions(for title: String, index: Int) -> UIAlertAction {
let alertAction = UIAlertAction(title: title, style: .default) { (action) in
self.handlerSelectedCategory?(index)
}
return alertAction
}
#objc func presentActions() {
let optionMenu = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
// add dymamic options
for (index, element) in self.categories.enumerated() {
optionMenu.addAction(prepareActions(for: element, index: index))
}
// cancel
let cancelAction = UIAlertAction(title: "Cancel", style: .destructive)
optionMenu.addAction(cancelAction)
handlerSelectedCategory = { index in
print(index, self.categories[index])
}
self.present(optionMenu, animated: true, completion: nil)
}

You can use following code for Alert and ActionSheet in Swift 4:
#IBAction func alert_act(_ sender: Any) {
do {
let alert = UIAlertController(title: "Alert", message: "Would you like to continue learning?", preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "No", style: UIAlertAction.Style.default, handler: nil))
alert.addAction(UIAlertAction(title: "Yes", style: UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
}
#IBAction func action_sheet1(_ sender: Any) {
let action_sheet1 = UIAlertController(title: nil, message: "Alert message.", preferredStyle: .actionSheet)
let defaultAction = UIAlertAction(title: "Default", style: .default, handler: nil)
let deleteAction = UIAlertAction(title: "Delete", style: .destructive, handler: nil)
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
action_sheet1.addAction(defaultAction)
action_sheet1.addAction(deleteAction)
action_sheet1.addAction(cancelAction)
self.present(action_sheet1, animated: true, completion: nil)
}

Swift 5+
Very Simple and Smooth way just call this function and Boommmmmm!!!!!!!
let IPAD = UIDevice.current.userInterfaceIdiom == .pad
//Mark:- Choose Image Method
func funcMyActionSheet() {
var myActionSheet = UIAlertController(title: nil, message: nil, preferredStyle: UIAlertController.Style.actionSheet)
myActionSheet.view.tintColor = UIColor.black
let galleryAction = UIAlertAction(title: "Gallery".localizableString(language: Defaults.selectedLanguageCode), style: .default, handler: {
(alert: UIAlertAction!) -> Void in
self.openGallary()
})
let cmaeraAction = UIAlertAction(title: "Camera".localizableString(language: Defaults.selectedLanguageCode), style: .default, handler: {
(alert: UIAlertAction!) -> Void in
self.openCamera()
})
let cancelAction = UIAlertAction(title: "Cancel".localizableString(language: Defaults.selectedLanguageCode), style: .cancel, handler: {
(alert: UIAlertAction!) -> Void in
})
if IPAD {
//In iPad Change Rect to position Popover
myActionSheet = UIAlertController(title: nil, message: nil, preferredStyle: UIAlertController.Style.alert)
}
myActionSheet.addAction(galleryAction)
myActionSheet.addAction(cmaeraAction)
myActionSheet.addAction(cancelAction)
print("Action Sheet call")
self.present(myActionSheet, animated: true, completion: nil)
}

You can use following code for open actionSheet in Swift:
let alert = UIAlertController(title: enter your title, message: "Enter your messgage. ", preferredStyle: UIAlertControllerStyle.Alert)
alert.addTextFieldWithConfigurationHandler(configurationTextField)
alert.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.Cancel, handler:{ (UIAlertAction)in
print("User click Cancel button")
}))
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler:{ (UIAlertAction)in
print("User click Ok button")
}))
self.presentViewController(alert, animated: true, completion: {
print("completion block")
})

How would I create a UIAlertView in Swift?

I have been working to create a UIAlertView in Swift, but for some reason I can't get the statement right because I'm getting this error:
Could not find an overload for 'init' that accepts the supplied
arguments
Here is how I have it written:
let button2Alert: UIAlertView = UIAlertView(title: "Title", message: "message",
delegate: self, cancelButtonTitle: "OK", otherButtonTitles: nil)
Then to call it I'm using:
button2Alert.show()
As of right now it is crashing and I just can't seem to get the syntax right.

From the UIAlertView class:
// UIAlertView is deprecated. Use UIAlertController with a
preferredStyle of UIAlertControllerStyleAlert instead
On iOS 8, you can do this:
let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
Now UIAlertController is a single class for creating and interacting with what we knew as UIAlertViews and UIActionSheets on iOS 8.
Edit: To handle actions:
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { action in
switch action.style{
case .Default:
print("default")
case .Cancel:
print("cancel")
case .Destructive:
print("destructive")
}
}}))
Edit for Swift 3:
let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.default, handler: nil))
self.present(alert, animated: true, completion: nil)
Edit for Swift 4.x:
let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
switch action.style{
case .default:
print("default")
case .cancel:
print("cancel")
case .destructive:
print("destructive")
}
}))
self.present(alert, animated: true, completion: nil)

One Button
class ViewController: UIViewController {
#IBAction func showAlertButtonTapped(_ sender: UIButton) {
// create the alert
let alert = UIAlertController(title: "My Title", message: "This is my message.", preferredStyle: UIAlertController.Style.alert)
// add an action (button)
alert.addAction(UIAlertAction(title: "OK", style: UIAlertAction.Style.default, handler: nil))
// show the alert
self.present(alert, animated: true, completion: nil)
}
}
Two Buttons
class ViewController: UIViewController {
#IBAction func showAlertButtonTapped(_ sender: UIButton) {
// create the alert
let alert = UIAlertController(title: "UIAlertController", message: "Would you like to continue learning how to use iOS alerts?", preferredStyle: UIAlertController.Style.alert)
// add the actions (buttons)
alert.addAction(UIAlertAction(title: "Continue", style: UIAlertAction.Style.default, handler: nil))
alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: nil))
// show the alert
self.present(alert, animated: true, completion: nil)
}
}
Three Buttons
class ViewController: UIViewController {
#IBAction func showAlertButtonTapped(_ sender: UIButton) {
// create the alert
let alert = UIAlertController(title: "Notice", message: "Lauching this missile will destroy the entire universe. Is this what you intended to do?", preferredStyle: UIAlertController.Style.alert)
// add the actions (buttons)
alert.addAction(UIAlertAction(title: "Remind Me Tomorrow", style: UIAlertAction.Style.default, handler: nil))
alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: nil))
alert.addAction(UIAlertAction(title: "Launch the Missile", style: UIAlertAction.Style.destructive, handler: nil))
// show the alert
self.present(alert, animated: true, completion: nil)
}
}
Handling Button Taps
The handler was nil in the above examples. You can replace nil with a closure to do something when the user taps a button. For example:
alert.addAction(UIAlertAction(title: "Launch the Missile", style: UIAlertAction.Style.destructive, handler: { action in
// do something like...
self.launchMissile()
}))
Notes
Multiple buttons do not necessarily need to use different UIAlertAction.Style types. They could all be .default.
For more than three buttons consider using an Action Sheet. The setup is very similar. Here is an example.

You can create a UIAlert using the standard constructor, but the 'legacy' one seems to not work:
let alert = UIAlertView()
alert.title = "Alert"
alert.message = "Here's a message"
alert.addButtonWithTitle("Understood")
alert.show()

In Swift 4.2 and Xcode 10
Method 1 :
SIMPLE ALERT
let alert = UIAlertController(title: "Your title", message: "Your message", preferredStyle: .alert)
let ok = UIAlertAction(title: "OK", style: .default, handler: { action in
})
alert.addAction(ok)
let cancel = UIAlertAction(title: "Cancel", style: .default, handler: { action in
})
alert.addAction(cancel)
DispatchQueue.main.async(execute: {
self.present(alert, animated: true)
})
Method 2 :
ALERT WITH SHARED CLASS
If you want Shared class style(Write once use every where)
import UIKit
class SharedClass: NSObject {//This is shared class
static let sharedInstance = SharedClass()
//Show alert
func alert(view: UIViewController, title: String, message: String) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
let defaultAction = UIAlertAction(title: "OK", style: .default, handler: { action in
})
alert.addAction(defaultAction)
DispatchQueue.main.async(execute: {
view.present(alert, animated: true)
})
}
private override init() {
}
}
Now call alert like this in every ware
SharedClass.sharedInstance.alert(view: self, title: "Your title here", message: "Your message here")
Method 3 :
PRESENT ALERT TOP OF ALL WINDOWS
If you want to present alert on top of all views, use this code
func alertWindow(title: String, message: String) {
DispatchQueue.main.async(execute: {
let alertWindow = UIWindow(frame: UIScreen.main.bounds)
alertWindow.rootViewController = UIViewController()
alertWindow.windowLevel = UIWindowLevelAlert + 1
let alert2 = UIAlertController(title: title, message: message, preferredStyle: .alert)
let defaultAction2 = UIAlertAction(title: "OK", style: .default, handler: { action in
})
alert2.addAction(defaultAction2)
alertWindow.makeKeyAndVisible()
alertWindow.rootViewController?.present(alert2, animated: true, completion: nil)
})
}
Function calling
SharedClass.sharedInstance.alertWindow(title:"This your title", message:"This is your message")
Method 4 :
Alert with Extension
extension UIViewController {
func showAlert(withTitle title: String, withMessage message:String) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
let ok = UIAlertAction(title: "OK", style: .default, handler: { action in
})
let cancel = UIAlertAction(title: "Cancel", style: .default, handler: { action in
})
alert.addAction(ok)
alert.addAction(cancel)
DispatchQueue.main.async(execute: {
self.present(alert, animated: true)
})
}
}
Now call like this
//Call showAlert function in your class
#IBAction func onClickAlert(_ sender: UIButton) {
showAlert(withTitle:"Your Title Here", withMessage: "YourCustomMessageHere")
}
Method 5 :
ALERT WITH TEXTFIELDS
If you want to add textfields to alert.
//Global variables
var name:String?
var login:String?
//Call this function like this: alertWithTF()
//Add textfields to alert
func alertWithTF() {
let alert = UIAlertController(title: "Login", message: "Enter username&password", preferredStyle: .alert)
// Login button
let loginAction = UIAlertAction(title: "Login", style: .default, handler: { (action) -> Void in
// Get TextFields text
let usernameTxt = alert.textFields![0]
let passwordTxt = alert.textFields![1]
//Asign textfileds text to our global varibles
self.name = usernameTxt.text
self.login = passwordTxt.text
print("USERNAME: \(self.name!)\nPASSWORD: \(self.login!)")
})
// Cancel button
let cancel = UIAlertAction(title: "Cancel", style: .destructive, handler: { (action) -> Void in })
//1 textField for username
alert.addTextField { (textField: UITextField) in
textField.placeholder = "Enter username"
//If required mention keyboard type, delegates, text sixe and font etc...
//EX:
textField.keyboardType = .default
}
//2nd textField for password
alert.addTextField { (textField: UITextField) in
textField.placeholder = "Enter password"
textField.isSecureTextEntry = true
}
// Add actions
alert.addAction(loginAction)
alert.addAction(cancel)
self.present(alert, animated: true, completion: nil)
}
Method 6:
Alert in SharedClass with Extension
//This is your shared class
import UIKit
class SharedClass: NSObject {
static let sharedInstance = SharedClass()
//Here write your code....
private override init() {
}
}
//Alert function in shared class
extension UIViewController {
func showAlert(title: String, msg: String) {
DispatchQueue.main.async {
let alert = UIAlertController(title: title, message: msg, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
}
}
Now call directly like this
self.showAlert(title: "Your title here...", msg: "Your message here...")
Method 7:
Alert with out shared class with Extension in separate class for alert.
Create one new Swift class, and import UIKit. Copy and paste below code.
//This is your Swift new class file
import UIKit
import Foundation
extension UIAlertController {
class func alert(title:String, msg:String, target: UIViewController) {
let alert = UIAlertController(title: title, message: msg, preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default) {
(result: UIAlertAction) -> Void in
})
target.present(alert, animated: true, completion: nil)
}
}
Now call alert function like this in all your classes (Single line).
UIAlertController.alert(title:"Title", msg:"Message", target: self)
How is it....

Click of View
#IBAction func testClick(sender: UIButton) {
var uiAlert = UIAlertController(title: "Title", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
self.presentViewController(uiAlert, animated: true, completion: nil)
uiAlert.addAction(UIAlertAction(title: "Ok", style: .Default, handler: { action in
println("Click of default button")
}))
uiAlert.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler: { action in
println("Click of cancel button")
}))
}
Done with two buttons OK & Cancel

If you're targeting iOS 7 and 8, you need something like this to make sure you're using the right method for each version, because UIAlertView is deprecated in iOS 8, but UIAlertController is not available in iOS 7:
func alert(title: String, message: String) {
if let getModernAlert: AnyClass = NSClassFromString("UIAlertController") { // iOS 8
let myAlert: UIAlertController = UIAlertController(title: title, message: message, preferredStyle: .Alert)
myAlert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
self.presentViewController(myAlert, animated: true, completion: nil)
} else { // iOS 7
let alert: UIAlertView = UIAlertView()
alert.delegate = self
alert.title = title
alert.message = message
alert.addButtonWithTitle("OK")
alert.show()
}
}

With the protocol extensions of Swift 2, you can make a protocol that provides a default implementation to your view controllers:
ShowsAlert.swift
import UIKit
protocol ShowsAlert {}
extension ShowsAlert where Self: UIViewController {
func showAlert(title: String = "Error", message: String) {
let alertController = UIAlertController(title: title, message: message, preferredStyle: .Alert)
alertController.addAction(UIAlertAction(title: "Ok", style: .Default, handler: nil))
presentViewController(alertController, animated: true, completion: nil)
}
}
ViewController.swift
class ViewController: UIViewController, ShowsAlert {
override func viewDidLoad() {
super.viewDidLoad()
showAlert(message: "Hey there, I am an error message!")
}
}

Show UIAlertView in swift language :-
Protocol UIAlertViewDelegate
let alert = UIAlertView(title: "alertView", message: "This is alertView", delegate:self, cancelButtonTitle:"Cancel", otherButtonTitles: "Done", "Delete")
alert.show()
Show UIAlertViewController in swift language :-
let alert = UIAlertController(title: "Error", message: "Enter data in Text fields", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)

Simply do not provide otherButtonTitles in the constructor.
let alertView = UIAlertView(title: "Oops!", message: "Something
happened...", delegate: nil, cancelButtonTitle: "OK")
alertView.show()
But I do agree with Oscar, this class is deprecated in iOS 8, so there won't be no use of UIAlertView if you're doing an iOS 8 only app. Otherwise the code above will work.

For SWIFT4, I think, extending UIViewController and creating a reusable confirmation control is the most elegant way.
You can extend the UIViewController as below:
extension UIViewController {
func AskConfirmation (title:String, message:String, completion:#escaping (_ result:Bool) -> Void) {
let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)
self.present(alert, animated: true, completion: nil)
alert.addAction(UIAlertAction(title: "Ok", style: .default, handler: { action in
completion(true)
}))
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { action in
completion(false)
}))
}
}
Then you can use it anytime:
AskConfirmation(title: "YOUR MESSAGE TITLE", message: "YOUR MESSAGE") { (result) in
if result { //User has clicked on Ok
} else { //User has clicked on Cancel
}
}

AlertView Swift 5 and above:-
let alert = UIAlertController(title: LocalizedStringConstant.alert, message: message, preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Retry", style: .cancel, handler: { (_) in
}))
self.present(alert, animated: true, completion: nil)

I found this one,
var alertView = UIAlertView();
alertView.addButtonWithTitle("Ok");
alertView.title = "title";
alertView.message = "message";
alertView.show();
not good though, but it works :)
Update:
but I have found on header file as:
extension UIAlertView {
convenience init(title: String, message: String, delegate: UIAlertViewDelegate?, cancelButtonTitle: String?, otherButtonTitles firstButtonTitle: String, _ moreButtonTitles: String...)
}
somebody may can explain this.

For iOS 13 Xcode 11+ Swift 5.X
UIAlertController can now provide Alerts as well as Action Sheets
Alerts
// First instantiate the UIAlertController
let alert = UIAlertController(title: "Title",
message: "Message ?",
preferredStyle: .alert)
// Add action buttons to it and attach handler functions if you want to
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
alert.addAction(UIAlertAction(title: "Just Do It!", style: .destructive, handler: nil))
alert.addAction(UIAlertAction(title: "Maybe", style: .default, handler: nil))
// Show the alert by presenting it
self.present(alert, animated: true)
Note that it's is a fundamental nature for all action buttons to dismiss the alert view when tapped. The style parameter is just for deciding the color of the text (and some default order in which the buttons should appear which ofc can be changed)
A sample handler function could be
func handler(_ action: UIAlertAction) {
if action.title == 'Title' {
// do stuff
}
}
As a side note, I would say instead of making 3 different handlers you can just make 1 and trace back to the element which provoked it in the manner shown above
We can also check alert.style but that again we can have multiple .default styled actions , I wouldn't recommend that
Action Sheets
The explanation is similar because the main difference here is that an alert interrupts the user whereas an action sheet slides from the bottom in an iPhone and appears as a popover in an iPad
The Purpose of action sheets is to guide the users in deciding his actions based on their current state. So you gotta treat action sheets like crossroads !. There is generally no message and the title is rendered as caption sized text
let action = UIAlertController(title: "What do you want to do with the message",
message: nil,
preferredStyle: .actionSheet)
action.addAction(UIAlertAction(title: "Cancel", style: .cancel))
for act in ["Save", "Post", "Discard"] {
action.addAction(UIAlertAction(title: act, style: .default, handler: nil))
}
self.present(action, animated: true)
The above code is going to work for an iPhone but will crash at runtime for an iPad because UIPopoverPresentationController is going to take charge of the alert and it won't be referencing anything at that time. So to avoid that you will have to provide the following chunk of code its mandatory
if let pop = action.popoverPresentationController {
let v = sender as! UIView
pop.sourceView = v
pop.sourceRect = v.bounds
}
Also in case of iPad tapping on anywhere outside the popover will dismiss it and the completion handler of .cancel action button will be called.
Hope that helps :) That being said, comment down below if you have any doubts

class Preview: UIViewController , UIAlertViewDelegate
{
#IBAction func MoreBtnClicked(sender: AnyObject)
{
var moreAlert=UIAlertView(title: "Photo", message: "", delegate: self, cancelButtonTitle: "No Thanks!", otherButtonTitles: "Save Image", "Email", "Facebook", "Whatsapp" )
moreAlert.show()
moreAlert.tag=111;
}
func alertView(alertView: UIAlertView, didDismissWithButtonIndex buttonIndex: Int)
{
if alertView.tag==111
{
if buttonIndex==0
{
println("No Thanks!")
}
else if buttonIndex==1
{
println("Save Image")
}
else if buttonIndex == 2
{
println("Email")
}
else if buttonIndex == 3
{
println("Facebook")
}
else if buttonIndex == 4
{
println("Whatsapp")
}
}
}
}

I have another trick. Suppose you have 5 classes where a logout alert to be applied. Try with swift class extension.
File- New- Swift class- Name it.
Add the following:
public extension UIViewController
{
func makeLogOutAlert()
{
var refreshAlert = UIAlertController(title: "Log Out", message: "Are You Sure to Log Out ? ", preferredStyle: UIAlertControllerStyle.Alert)
refreshAlert.addAction(UIAlertAction(title: "Confirm", style: .Default, handler: { (action: UIAlertAction!) in
self.navigationController?.popToRootViewControllerAnimated(true)
}))
refreshAlert.addAction(UIAlertAction(title: "Cancel", style: .Default, handler: { (action: UIAlertAction!) in
refreshAlert .dismissViewControllerAnimated(true, completion: nil)
}))
presentViewController(refreshAlert, animated: true, completion: nil)
}
}
Implement using : self.makeLogOutAlert(). Hope it helps.

I have made a singleton class to make this convenient to use from anywhere in your app: https://github.com/Swinny1989/Swift-Popups
You can then create a popup with multiple buttons like this:
Popups.SharedInstance.ShowAlert(self, title: "Title goes here", message: "Messages goes here", buttons: ["button one" , "button two"]) { (buttonPressed) -> Void in
if buttonPressed == "button one" {
//Code here
} else if buttonPressed == "button two" {
// Code here
}
}
or popups with a single button like this:
Popups.SharedInstance.ShowPopup("Title goes here", message: "Message goes here.")

Swift 3
The following is a simple example of how to create a simple alert with one button with Swift 3.
let alert = UIAlertController(title: "Title",
message: "Message",
preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Ok", style: .default))
present(alert, animated: true)
In the above example the handle callback of the action has been omitted because the default behaviour of an alert view with one button is to disappear when the button is clicked.
Here is how to create another action, which could be added to the alert with "alert.addAction(action)". The different styles are .default, .destructive and .cancel.
let action = UIAlertAction(title: "Ok", style: .default) { action in
// Handle when button is clicked
}

I got the following UIAlertView initialization code to compile without errors (I thing the last, varyadic part is tricky perhaps). But I had to make sure the class of self (which I am passing as the delegate) was adopting the UIAlertViewDelegate protocol for the compile errors to go away:
let alertView = UIAlertView(
title: "My Title",
message: "My Message",
delegate: self,
cancelButtonTitle: "Cancel",
otherButtonTitles: "OK"
)
By the way, this is the error I was getting (as of Xcode 6.4):
Cannot find an initializer for type 'UIAlertView' that accepts an
argument list of type '(title: String, message: String, delegate:
MyViewController, cancelButtonTitle: String, otherButtonTitles:
String)'
As others mentioned, you should migrate to UIAlertController if you can target iOS 8.x+. To support iOS 7, use the code above (iOS 6 is not supported by Swift).

let alertController = UIAlertController(title: "Select Photo", message: "Select atleast one photo", preferredStyle: .alert)
let action1 = UIAlertAction(title: "From Photo", style: .default) { (action) in
print("Default is pressed.....")
}
let action2 = UIAlertAction(title: "Cancel", style: .cancel) { (action) in
print("Cancel is pressed......")
}
let action3 = UIAlertAction(title: "Click new", style: .default) { (action) in
print("Destructive is pressed....")
}
alertController.addAction(action1)
alertController.addAction(action2)
alertController.addAction(action3)
self.present(alertController, animated: true, completion: nil)
}

You can use this simple extension with n number of buttons and associated actions swift4 and above
extension UIViewController {
func popupAlert(title: String?, message: String?, actionTitles:[String?], actions:[((UIAlertAction) -> Void)?]) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
for (index, title) in actionTitles.enumerated() {
let action = UIAlertAction(title: title, style: .default, handler: actions[index])
alert.addAction(action)
}
self.present(alert, animated: true, completion: nil)
}
}
you can use it like ,
self.popupAlert(title: "Message", message: "your message", actionTitles: ["first","second","third"], actions:[
{action1 in
//action for first btn click
},
{action2 in
//action for second btn click
},
{action3 in
//action for third btn click
}, nil])

The reason it doesn't work because some value you passed to the function isn't correct. swift doesn't like Objective-C, you can put nil to arguments which are class type without any restriction(might be). Argument otherButtonTitles is defined as non-optional which its type do not have (?)at its end. so you must pass a concrete value to it.

#IBAction func Alert(sender: UIButton) {
var alertView:UIAlertView = UIAlertView()
alertView.title = "Alert!"
alertView.message = "Message"
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
}
Try this

Use this code to display an alertview
let alertController = UIAlertController(title: "Hello Coders", message: "your alert message", preferredStyle: .Alert)
let defaultAction = UIAlertAction(title: "Close Alert", style: .Default, handler: nil)
alertController.addAction(defaultAction)
presentViewController(alertController, animated: true, completion: nil)
Reference: Swift Show Alert using UIAlertController

in xcode 9
let alert = UIAlertController(title: "Alert", message: "message", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(alert, animated: true, completion: nil)

SWIFT 4 : Simply create a extension to UIViewController as follows:
extension UIViewController {
func showSuccessAlert(withTitle title: String, andMessage message:String) {
let alert = UIAlertController(title: title, message: message,
preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "OK".localized, style:
UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
}
Now in your ViewController, directly call above function as if they are provided by UIViewController.
yourViewController.showSuccessAlert(withTitle:
"YourTitle", andMessage: "YourCustomTitle")

Or just do this
let alert = UIAlertController(title: "Alert", message: "Saved Successfully", preferredStyle: UIAlertController.Style.alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: nil))
self.present(alert, animated: true, completion: nil)

try This.
Put Bellow Code In Button.
let alert = UIAlertController(title: "Your_Title_Text", message: "Your_MSG", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Your_Text", style: UIAlertActionStyle.default, handler: nil))
self.present(alert, animated:true, completion: nil)

Here is a funny example in Swift:
private func presentRandomJoke() {
if let randomJoke: String = jokesController.randomJoke() {
let alertController: UIAlertController = UIAlertController(title:nil, message:randomJoke, preferredStyle: UIAlertControllerStyle.Alert)
alertController.addAction(UIAlertAction(title:"Done", style:UIAlertActionStyle.Default, handler:nil))
presentViewController(alertController, animated:true, completion:nil)
}
}

Here is a pretty simple function of AlertView in Swift :
class func globalAlertYesNo(msg: String) {
let alertView = UNAlertView(title: "Title", message: msg)
alertView.messageAlignment = NSTextAlignment.Center
alertView.buttonAlignment = UNButtonAlignment.Horizontal
alertView.addButton("Yes", action: {
print("Yes action")
})
alertView.addButton("No", action: {
print("No action")
})
alertView.show()
}
You have to pass message as a String where you use this function.

The Old Way: UIAlertView
let alertView = UIAlertView(title: "Default Style", message: "A standard alert.", delegate: self, cancelButtonTitle: "Cancel", otherButtonTitles: "OK")
alertView.alertViewStyle = .Default
alertView.show()
// MARK: UIAlertViewDelegate
func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int) {
switch buttonIndex {
// ...
}
}
The New Way: UIAlertController
let alertController = UIAlertController(title: "Default Style", message: "A standard alert.", preferredStyle: .Alert)
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) { (action) in
// ...
}
alertController.addAction(cancelAction)
let OKAction = UIAlertAction(title: "OK", style: .Default) { (action) in
// ...
}
alertController.addAction(OKAction)
self.presentViewController(alertController, animated: true) {
// ...
}

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