I have two buttons, one that shows the segmented control and one that tries to hide it. The problem is when I click the one to show it, it works. However, when I click the one to hide it, it doesn't work. Here is my code:
let delayHide = UIAlertAction(title: "Hide Delay", style: .default) { (action) in
self.segmentedHidden = 1
self.setupSegmented()
}
let delayShow = UIAlertAction(title: "Show Delay", style: .default) { (action) in
self.segmentedHidden = 0
self.setupSegmented()
}
Here is also the code for when I try to hide it:
if (segmentedHidden == 0) {
segmentedControl.isHidden = false
} else {
segmentedControl.isHidden = true
}
Where did I go wrong?
Use following code:
#IBAction func buttonTapped(_ sender: UIButton) {
let alert = UIAlertController(title: "Alert", message: "Segment", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Show", style: .default, handler: { (alertAction) in
self.showHideSegmentControl(isHidden: false)
}))
alert.addAction(UIAlertAction(title: "hide", style: .default, handler: { (alertAction) in
self.showHideSegmentControl(isHidden: true)
}))
self.present(alert, animated: true, completion: nil)
}
func showHideSegmentControl(isHidden: Bool) {
segmentedControl.isHidden = isHidden
}
Related
I am trying to implement actionsheet in ipad with the help of popoverPresentationController.everything is working fine but i am facing one problem that Cancel
style button is not coming in the actionsheet.
here is my code for refernece
#IBAction func logoutAction(_ sender: UIButton) {
let alertController = UIAlertController(title: "", message: "do you want to logout", preferredStyle: .actionSheet)
let yesAction = UIAlertAction(title: "Logout", style: .destructive, handler: { (action) -> Void in
Singleton.sharedInstance.logoutButtonAction()
logEvent(label: "user_log_out")
})
let noAction = UIAlertAction(title: "cancel", style: .cancel, handler: { (action) -> Void in
self?.dismiss(animated: true, completion: nil)
})
alertController.addAction(yesAction)
alertController.addAction(noAction)
alertController.popoverPresentationController?.sourceView = self?.view
alertController.popoverPresentationController?.sourceRect = sender.frame
/* if let presenter = alertController.popoverPresentationController {
presenter.sourceView = self!.logoutButton
presenter.sourceRect = self!.logoutButton.bounds
}*/
self?.present(alertController, animated: true, completion: nil)
})
}
```
I'm trying to fire an alert that asks if you want to save or delete a draft after pressing cancel. I'm quite close, but I can't seem to get it right.
I'm unwinding from 'ReplyMailViewController'(ViewController A) to 'MailContentViewController'(ViewController B).
I added the following code in ViewController A to show the alert and 'hold' the segue perform:
override func shouldPerformSegue(withIdentifier identifier: String?, sender: Any?) -> Bool {
if let ident = identifier {
if ident == "cancelDraft" {
let saveDraftActionHandler = { (action:UIAlertAction!) -> Void in
NSLog("EXIT")
}
let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let deleteDraftAction = UIAlertAction(title: "Delete Draft", style: .destructive, handler: nil)
alertController.addAction(deleteDraftAction)
let saveDraftAction = UIAlertAction(title: "Save Draft", style: .default, handler: saveDraftActionHandler)
alertController.addAction(saveDraftAction)
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
alertController.addAction(cancelAction)
present(alertController, animated: true, completion: nil)
return false
}
}
return true
}
The segue holds with this code, but the issue is that I can't figure out how to continue the unwind segue after pressing 'Save Draft' for example.
I also have an unwind function in View Controller B, but I can't seem to figure out how I can use this one for this task:
#IBAction func cancelToMailContentViewController(_ segue: UIStoryboardSegue) {
}
Instead of perform the segue directly you need to show your UIAlertViewController first and according to the user response execute your segue or not
#IBAction func showAlertViewController(){
let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let replyAction = UIAlertAction(title: "Delete Draft", style: .destructive, handler: nil)
let replyAllAction = UIAlertAction(title: "Save Draft", style: .default) { (action) in
//Do whatever you need here
}
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) { (action) in
self.performSegue(withIdentifier: "cancelDraft", sender: action) //executing the segue on cancel
}
alertController.addAction(replyAllAction)
alertController.addAction(replyAction)
alertController.addAction(cancelAction)
present(alertController, animated: true, completion: nil)
}
After this you only need to change the unwind segue action to execute this method, and your segue will be executed if you press cancel in the UIAlertViewController via self.performSegue(withIdentifier: #<SegueIdentifier>, sender: #<sender>)
First, make the alert with two options:
class ViewController: UIViewController {
#IBAction func showAlertButtonTapped(_ sender: UIButton) {
// create the alert
let alert = UIAlertController(title: "UIAlertController", message: "Save this work?", preferredStyle: UIAlertControllerStyle.alert)
// add the actions (buttons)
alert.addAction(UIAlertAction(title: "Hell Yeah", style: UIAlertActionStyle.default, handler: nil))
alert.addAction(UIAlertAction(title: "Hell No", style: UIAlertActionStyle.cancel, handler: nil))
// show the alert
self.present(alert, animated: true, completion: nil)
}
After this, you have to make the segue and then name it (also connect it by control dragging from the view controller yellow icon to the other view controller):
After that put this your code to execute the segue:
self.performSegue(withIdentifier: ":)", sender: self)
After that you are going to execute the segue when the user responds to the alert:
if buttonTitle == "Hell Yeah" {
elf.performSegue(withIdentifier: ":)", sender: self)
}
so, in the end, your code should look like this:
class ViewController: UIViewController {
#IBAction func showAlertButtonTapped(_ sender: UIButton) {
// create the alert
let alert = UIAlertController(title: "UIAlertController", message: "Save this work?", preferredStyle: UIAlertControllerStyle.alert)
// add the actions (buttons)
alert.addAction(UIAlertAction(title: "Hell Yeah", style: UIAlertActionStyle.default, handler: nil))
alert.addAction(UIAlertAction(title: "Hell No", style: UIAlertActionStyle.cancel, handler: nil))
// show the alert
self.present(alert, animated: true, completion: nil)
if buttonTitle == "Hell Yeah" {
self.performSegue(withIdentifier: ":)", sender: self)
}
}
}
I'm using the code below:
<<< ButtonRow("MyCell") { $0.title = $0.tag $0.presentationMode = .segueName(segueName: "ShowMyScreen", onDismiss: nil) }
Now, I need to perform a conditon on click and move only if it's true and show an alert if it's false. Then move if the user clicks on ok from the alert.
How do I do that?
Use the .onCellSelection closure
Example code of your requirements
<<< ButtonRow("MyCell") { $0.title = $0.tag
}.onCellSelection({ (cell, row) in
if(yourCondition)
{
self.performSegue(withIdentifier: "ShowMyScreen", sender: nil)
}else{
let alert = UIAlertController(title: "test", message: "test", preferredStyle: .alert)
let action = UIAlertAction(title: "OK", style: .default, handler: { (action) in
self.performSegue(withIdentifier: "ShowMyScreen", sender: nil)
})
let action2 = UIAlertAction(title: "Cancel", style: .default, handler: nil)
alert.addAction(action)
alert.addAction(action2)
self.present(alert, animated: true, completion: nil)
}
})
How can I show a UIActionsheet in iPad when I'm using my current code its giving me this error:
Your application has presented a UIAlertController (<UIAlertController: 0x7f9ec624af70>) of style UIAlertControllerStyleActionSheet. The modalPresentationStyle of a UIAlertController with this style is UIModalPresentationPopover. You must provide location information for this popover through the alert controller's popoverPresentationController. You must provide either a sourceView and sourceRect or a barButtonItem. If this information is not known when you present the alert controller, you may provide it in the UIPopoverPresentationControllerDelegate method -prepareForPopoverPresentation.
which is working totally fine in an iPhone :
let optionMenu = UIAlertController(title: nil, message: nil, preferredStyle: .ActionSheet)
let reminderAction = UIAlertAction(title: "Reminder", style: .Default, handler: {
(alert: UIAlertAction!) -> Void in }
optionMenu.addAction(reminderAction)
self.presentViewController(optionMenu, animated: true, completion: nil)
I came across some similar problems, the solution was this:
let optionMenu = UIAlertController(title: nil, message: nil, preferredStyle: .ActionSheet)
optionMenu.popoverPresentationController?.sourceView = self.view
optionMenu.popoverPresentationController?.sourceRect = self.view.bounds
but it didnt worked for me maybe because my ActionSheet's Sender is on a UItableviewCell.
I tired to set AlertController's Sourceview to tableView's Cell but its not correctly placed and sometime its partially visible this is what I tried:
optionMenu.popoverPresentationController?.sourceView = currentCell.contentView
optionMenu.popoverPresentationController?.sourceRect = currentCell.contentView.bounds
Any clue how can I fix this problem?
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)
If you want to show any ActionSheet on iPad so their use popoverPresentationController to show and at iPad don't show the cancel style button of action sheet.
Use this code in Swift 3:
#IBAction func ActionSheetShow(_ sender: UIButton) {
let actionSheet = UIAlertController(title: "Choose any option", message: "choose as you like here!", preferredStyle: .actionSheet)
actionSheet.addAction(UIAlertAction(title: "Click1", style: .cancel, handler: {
action in
print("first button")
}))
actionSheet.addAction(UIAlertAction(title: "Click2", style: .default, handler: {
action in
print("second button")
}))
actionSheet.addAction(UIAlertAction(title: "Click3", style: .destructive, handler: {
action in
print("third button")
}))
actionSheet.popoverPresentationController?.sourceView = self.view
actionSheet.popoverPresentationController?.sourceRect = sender.frame
present(actionSheet, animated: true, completion: nil)
}
Good Luck!
Swift 4.1 Solution:-
MAK Eextension FILE UIDEviceExtension.swift and with below code :-
import Foundation
import UIKit
public extension UIDevice {
public class var isPhone: Bool {
return UIDevice.current.userInterfaceIdiom == .phone
}
public class var isPad: Bool {
return UIDevice.current.userInterfaceIdiom == .pad
}
public class var isTV: Bool {
return UIDevice.current.userInterfaceIdiom == .tv
}
public class var isCarPlay: Bool {
return UIDevice.current.userInterfaceIdiom == .carPlay
}
}
Call your action Sheet on UIViewcontroller By this Separate common method :-
import Foundation
import UIKit
class Common: NSObject{
public class func showActionSheet(vc: UIViewController,sender:UIButton? = nil) {
let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler: { (alert:UIAlertAction!) -> Void in
//self.camera()
}))
actionSheet.addAction(UIAlertAction(title: "Gallery", style: .default, handler: { (alert:UIAlertAction!) -> Void in
//self.photoLibrary()
}))
actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
//if iPhone
if UIDevice.isPhone {
vc.present(actionSheet, animated: true, completion: nil)
}
else {
//In iPad Change Rect to position Popover
if let btn = sender{
actionSheet.popoverPresentationController?.sourceRect = btn.frame
actionSheet.popoverPresentationController?.sourceView = vc.view
}
vc.present(actionSheet, animated: true, completion: nil)
}
}
}
Use it from your UIButton Click for iPhone/iPad both :-
#objc func btnPicImageTaped(btn:UIButton){
print("it will work for both iPhone /ipad")
Common.showActionSheet(vc: self,sender: btn)
}
Add Following two lines before presentViewController. (Swift 3.2)
optionMenu.popoverPresentationController?.sourceView = self.view
optionMenu.popoverPresentationController?.sourceRect = (sender as AnyObject).frame
present(optionMenu, animated: true, completion: nil)
Updated for swift 5
extension UIDevice {
class var isPhone: Bool {
return UIDevice.current.userInterfaceIdiom == .phone
}
class var isPad: Bool {
return UIDevice.current.userInterfaceIdiom == .pad
}
class var isTV: Bool {
return UIDevice.current.userInterfaceIdiom == .tv
}
class var isCarPlay: Bool {
return UIDevice.current.userInterfaceIdiom == .carPlay
}
}
You can take sourceView & sourceRect from sender:
#IBAction func btMenuPressed(_ sender: Any) {
let Sender = sender as? UIButton
let actSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
actSheet.addAction(UIAlertAction(title: "settings", style: .default) { _ in self.doSettings() })
...
...
actSheet.popoverPresentationController?.sourceView = Sender!.superview!
actSheet.popoverPresentationController?.sourceRect = Sender!.frame
resent(actSheet, animated: true)
}
Swift 5+ solution Very smooth and easy just call this function and you will easy solve your problem
let IPAD = UIDevice.current.userInterfaceIdiom == .pad
//Mark:- Choose Action Sheet Methods
func actionSheet() {
var actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: UIAlertController.Style.actionSheet)
actionSheet.view.tintColor = UIColor.black
let button1 = UIAlertAction(title: "Button 1".localizableString(language: Defaults.selectedLanguageCode), style: .default, handler: {
(alert: UIAlertAction!) -> Void in
})
let button2 = UIAlertAction(title: "Button 2".localizableString(language: Defaults.selectedLanguageCode), style: .default, handler: {
(alert: UIAlertAction!) -> Void in
})
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
actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: UIAlertController.Style.alert)
}
actionSheet.addAction(button1)
actionSheet.addAction(button2)
actionSheet.addAction(cancelAction)
print("Action Sheet Open")
self.present(actionSheet, animated: true, completion: nil)
}
I am trying to create a UIAlertController with two options 'Cancel' and 'Log out'. I want the 'Cancel' button to cancel the alert and the 'Log out' button to perform the segue associated with it, which i have set up in the storyboard.
My code is;
class HomeVC: UIViewController {
#IBAction func SignOutBtn(sender: UIButton) {
let alertController = UIAlertController(title: "Alert",
message: "Are you sure you want to log out?",
preferredStyle: .Alert)
let cancelAction = UIAlertAction(title:"Cancel",
style: .Cancel) { (action) -> Void in
print("You selected the Cancel action.")
}
let submitAction = UIAlertAction(title:"Log out",
style: .Default) { (action) -> Void in
print("You selected the submit action.")
self.presentedViewController
}
alertController.addAction(submitAction)
alertController.addAction(cancelAction)
self.presentViewController(alertController, animated: true, completion: nil)
}
}
Well it seems your'e missing the actions you want to perform inside the blocks.
(also, you may want to dismiss the alert controller, inside the blocks as well.)
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: { (action) -> Void in
print("You selected the Cancel action.")
alertController.dismissViewControllerAnimated(true, completion: nil)
})
let submitAction = UIAlertAction(title: "Log out", style: .Default, handler: { (action) -> Void in
print("You selected the submit action.")
alertController.dismissViewControllerAnimated(true, completion: { () -> Void in
// Perform your custom segue action you need.
})
})
If you have set up a segue from one view to another, in your button handler for log out then you can call self.performSegueWithIdentifier("storyboadIdentifier") which will call the prepareForSeguemethod so you can modify or pass info along the segue if need be.
#pbush25
class HomeVC: UIViewController {
#IBAction func SignOutBtn(sender: UIButton) {
let alertController = UIAlertController(title: "Alert",
message: "Are you sure you want to log out?",
preferredStyle: .Alert)
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: { (action) -> Void in
print("You selected the Cancel action.")
alertController.dismissViewControllerAnimated(true, completion: nil)
})
let submitAction = UIAlertAction(title: "Log out", style: .Default, handler: { (action) -> Void in
print("You selected the submit action.")
alertController.dismissViewControllerAnimated(true, completion: { () -> Void in
self.performSegueWithIdentifier("segue", sender: nil)
})
})
alertController.addAction(submitAction)
alertController.addAction(cancelAction)
self.presentViewController(alertController, animated: true, completion: nil)
}