I tried to add UILabel into AlertController but it couldnt display on Alert.
I can make it for UIImageView but I couldnt it for UILabel. This followings are my code snippet
let alert = UIAlertController(title: meta.name!, message: "", preferredStyle: .alert)
alert.addAction( UIAlertAction(title: "OK", style: .default, handler: nil) )
var sizeLabel = UILabel(frame: CGRect(x: 10, y: 10, width: 50, height: 50))
sizeLabel.numberOfLines = 0
sizeLabel.lineBreakMode = .byWordWrapping
sizeLabel.sizeToFit()
sizeLabel.preferredMaxLayoutWidth = alert.view.frame.size.width
sizeLabel.font = UIFont(name: "Avenir-Light", size: 20)
sizeLabel.text = "Hello IOS"
alert.view.addSubview(sizeLabel)
So after some quick research it looks like you can't directly add a label to a UIAlertController. You can, however, use AttributedStrings. I used the answer from https://stackoverflow.com/a/30661824/8722754 for my inspiration and updated it to Swift 3:
let attributedString = NSAttributedString(string: "My Message",
attributes: [NSAttributedStringKey.font : UIFont(name: "Avenir-Light", size: 20)!])
let alert = UIAlertController(title: "Title", message: "", preferredStyle: .alert)
alert.setValue(attributedString, forKey: "attributedMessage")
let cancelAction = UIAlertAction(title: "OK", style: .default, handler: nil)
alert.addAction(cancelAction)
present(alert, animated: true, completion: nil)
Related
In following code popover on iPad is not centred for second alert (cities) when iPad is rotated. It works fine for first alert (countries) though. I've printed the values and it's same for both alerts. It seems that despite having correct value for coordinates it doesn't present it in centre on device rotation for second alert.
Why it doesn't show in centre for second alert? How to fix it?
class MyVC: UIViewController {
var popoverController:UIPopoverPresentationController?
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
self.tableView.reloadData()
if self.popoverController != nil {
popoverController?.sourceView = self.view
print("viewWillTransition():width: x: \(UIScreen.main.bounds.size.width*0.5), y: \(UIScreen.main.bounds.size.height*0.5)")
popoverController?.sourceRect = CGRect(x: UIScreen.main.bounds.size.width*0.5, y: UIScreen.main.bounds.size.height*0.5, width: 0, height: 0)
popoverController?.permittedArrowDirections = []
}
}
#IBAction func countryButtonClicked(_ sender: UIBarButtonItem) {
displayCountries()
}
func displayCountries() {
let alert = UIAlertController(title: "", message: "", preferredStyle: .actionSheet)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .center
let titleAttributedText = NSMutableAttributedString(
string: "Select Country",
attributes: [
NSAttributedString.Key.paragraphStyle: paragraphStyle
]
)
alert.setValue(titleAttributedText, forKey: "attributedMessage")
alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: countryHandler))
for list in Countries {
alert.addAction(UIAlertAction(title: list, style: .default, handler: countryHandler))
}
// For iPad
if let poController = alert.popoverPresentationController {
popoverController = poController
popoverController?.sourceView = self.view
print("displayCountries():width: x: \(UIScreen.main.bounds.size.width*0.5), y: \(UIScreen.main.bounds.size.height*0.5)")
popoverController?.sourceRect = CGRect(x: UIScreen.main.bounds.size.width*0.5, y: UIScreen.main.bounds.size.height*0.5, width: 0, height: 0)
popoverController?.permittedArrowDirections = []
}
alert.view.addSubview(UIView())
present(alert, animated: false, completion: nil)
}
#IBAction func cityButtonClicked(_ sender: Any) {
showCities()
}
func showCities(){
let alert = UIAlertController(title: "Select City", message: nil, preferredStyle: .actionSheet)
for listItem in Cities {
alert.addAction(UIAlertAction(title: listItem.title, style: .default, handler: cityHandler))
}
alert.addAction(UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: cityHandler))
if let popoverController = alert.popoverPresentationController {
popoverController.sourceView = self.view
print("showCities():width: x: \(UIScreen.main.bounds.size.width*0.5), y: \(UIScreen.main.bounds.size.height*0.5)")
popoverController.sourceRect = CGRect(x: UIScreen.main.bounds.size.width*0.5, y: UIScreen.main.bounds.size.height*0.5, width: 0, height: 0)
popoverController.permittedArrowDirections = []
}
alert.view.addSubview(UIView())
present(alert, animated: false, completion: nil)
}
}
popoverController must be also assigned in second alert:
if let popoverController = alert.popoverPresentationController {
self.popoverController = popoverController
...
I have this code:
func alertBox(txt: String){
let ac = UIAlertController(title: "MyTtle" , message: "More information in my website: ", preferredStyle: .alert)
let ramkaNaObrazek = CGRect(origin: CGPoint(x: 10, y: 10), size: CGSize(width: 30, height: 30))
let ikonaAlertu = UIImageView(frame: ramkaNaObrazek)
ikonaAlertu.image = UIImage(named: "modal_podpowiedz")
ac.view.addSubview(ikonaAlertu)
ac.addAction(UIAlertAction(title: "Ok" , style: .cancel, handler: { (action: UIAlertAction!) in
}))
present(ac, animated: true)
}
I would like to add after this text: "More information in my website:" + www - a link to my website (http://www.myname.pl).
How can I do this?
You can't add custom fields like text views with clickable links to a UIAlertController. You will need to either create your own modal view controller that acts like a UIAlertController or use a third party framework that does it for you.
i have an AlertController with UITextView.
when UITexView become first responder the alter doesn't move up with the keyboard.
this is my code:
#IBAction func showAlert(sender: AnyObject) {
let alertController = UIAlertController(title: "Hello, I'm alert! \n\n\n\n\n\n\n", message: "", preferredStyle: .alert)
let rect = CGRect(x: 15, y: 15, width: 240, height: 150)//CGRectMake(15, 50, 240, 150.0)
let textView = UITextView(frame: rect)
textView.font = UIFont(name: "Helvetica", size: 15)
textView.textColor = UIColor.lightGray
textView.backgroundColor = UIColor.white
textView.layer.borderColor = UIColor.lightGray.cgColor
textView.layer.borderWidth = 1.0
textView.text = "Enter message here"
textView.delegate = self
alertController.view.addSubview(textView)
let cancel = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
let action = UIAlertAction(title: "Ok", style: .default, handler: { action in
let msg = (textView.textColor == UIColor.lightGray) ? "" : textView.text
print(msg!)
})
alertController.addAction(cancel)
alertController.addAction(action)
self.present(alertController, animated: true, completion: {
textView.becomeFirstResponder()
})
}
and this is my result:
there is a solution?
thanks in advance
just addTextField and then remove it
alert.addTextField { field in
field.translatesAutoresizingMaskIntoConstraints = false
field.heightAnchor.constraint(equalToConstant: 0).isActive = true
}
let inCntrlr = alert.childViewControllers[0].view!
inCntrlr.removeFromSuperview()
and then you could add your own views. here is a
result
After presenting alert controller. Open keyboard for TextView and move alert controller up.
I hope this will suite for you.
self.present(alertController, animated: true, completion: {
textView.becomeFirstResponder()
UIView.animate(withDuration: 0.5, animations: {
alertController.view.frame.origin.y = 100
})
})
UIAlertController by default will slide up when they keyboard is shown. The problem here is that you have added a subview to the alert controller. From the UIAlertController docs:
The UIAlertController class is intended to be used as-is and does not
support subclassing. The view hierarchy for this class is private and
must not be modified.
Adding your own subview to the alert goes against what the docs say and is likely what is causing your problem. If you need an alert with a text view in it, your best bet is to create your own view and manage it yourself.
I created this drop-in replacement, also customizable for any special needs of course. It's pretty simple and 'just works'!
https://gist.github.com/unixb0y/42a1ae0fb707bdb5e1e484bafd33d44a
It is a subclass of UIAlertController with a UITextView inside.
When it is initialized, it observes keyboard changes and adjusts its view.frame.origin.y accordingly.
var keyboardHeight: CGFloat = 100 {
didSet {
let height = UIScreen.main.bounds.height
let menu = self.view.frame.height
let keyb = self.keyboardHeight
self.view.frame.origin.y = height-menu-keyb-20
}
}
...
...
...
#objc func keyboardChange(sender: Notification) {
guard let userInfo = sender.userInfo else { return }
let endFrame = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect
keyboardHeight = endFrame?.height ?? 100
}
It's like. You open keyboard and change alert position.
var alertController = UIAlertController(title: nil, message: nil, preferredStyle: UIAlertController.Style.alert)
var alertControllerPositon:CGFloat = 0
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#IBAction func showAlert(sender: AnyObject) {
let alertController = UIAlertController(title: "Hello, I'm alert! \n\n\n\n\n\n\n", message: "", preferredStyle: .alert)
let rect = CGRect(x: 15, y: 15, width: 240, height: 150)//CGRectMake(15, 50, 240, 150.0)
let textView = UITextView(frame: rect)
textView.font = UIFont(name: "Helvetica", size: 15)
textView.textColor = UIColor.lightGray
textView.backgroundColor = UIColor.white
textView.layer.borderColor = UIColor.lightGray.cgColor
textView.layer.borderWidth = 1.0
textView.text = "Enter message here"
textView.delegate = self
alertController.view.addSubview(textView)
let cancel = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
let action = UIAlertAction(title: "Ok", style: .default, handler: { action in
let msg = (textView.textColor == UIColor.lightGray) ? "" : textView.text
print(msg!)
})
alertController.addAction(cancel)
alertController.addAction(action)
self.present(alertController, animated: true, completion: {
textView.becomeFirstResponder()
})
alertControllerPositon = alertController.view.frame.origin.y
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
alertControllerPositon = alertController.view.frame.origin.y
let result = self.view.frame.height - (alertController.view.frame.height + alertController.view.frame.origin.y) - 20
self.alertController.view.frame.origin.y -= (keyboardSize.height - result)
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if self.alertController.view.frame.origin.y != alertControllerPositon {
self.alertController.view.frame.origin.y = alertControllerPositon
}
}
I want to add a UIStepper to my alerView but the stepper is not showing here is my code
var alert = UIAlertView(title: "Hello works", message: "\n\n", delegate: nil, cancelButtonTitle: "OK", otherButtonTitles: "")
var stepper = UIStepper()
stepper.frame = CGRect(x: CGFloat(12.0), y: CGFloat(5.0), width: CGFloat(100), height: CGFloat(10))
alert.addSubview(stepper)
alert.show()
UIAlertView is deprecated. You should use UIAlertController instead. Here is an answer that explains how you can implement what you want using a UIAlertController:
UIAlertController - add custom views to actionsheet
// Below is code for implementing UIAlertView Using UIAlertController in swift and add your custom views on it .
let logoutAlert = UIAlertController(title: "Alert", message: "DemoAlert", preferredStyle: UIAlertControllerStyle.alert)
logoutAlert.addAction(UIAlertAction(title: "cancel", style: .default, handler: nil))
logoutAlert.addAction(UIAlertAction(title: "Ok", style: .default, handler: { (action: UIAlertAction!) in
// Write your code here
}))
var stepper = UIStepper()
stepper.frame = CGRect(x: CGFloat(12.0), y: CGFloat(5.0), width: CGFloat(100), height: CGFloat(10))
// You can add any view on UIAlert controller using below code:
logoutAlert.popoverPresentationController?.sourceRect = stepper.frame
logoutAlert.popoverPresentationController?.sourceView = stepper
self.present(logoutAlert, animated: true, completion: nil)
I am very new to swift coding so I want to know that is there any way to show tableview in alertcontroller using swift.
var alrController = UIAlertController(title: "\n\n\n\n\n\n", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
let margin:CGFloat = 8.0
let rect = CGRectMake(margin, margin, alrController.view.bounds.size.width - margin * 4.0, 100.0)
var tableView = UITableView(frame: rect)
tableView.delegate = self
tableView.dataSource = self
tableView.backgroundColor = UIColor.greenColor()
alrController.view.addSubview(tableView)
let somethingAction = UIAlertAction(title: "Something", style: UIAlertActionStyle.Default, handler: {(alert: UIAlertAction!) in println("something")})
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: {(alert: UIAlertAction!) in println("cancel")})
alrController.addAction(somethingAction)
alrController.addAction(cancelAction)
self.presentViewController(alrController, animated: true, completion:{})
private var alertController = UIAlertController()
private var tblView = UITableView()
private func setupCitySelectionAlert() {
let alertVC = UIViewController.init()
let rect = CGRect(x: 0.0, y: 0.0, width: 300.0, height: 300.0)
alertVC.preferredContentSize = rect.size
tblView = UITableView(frame: rect)
tblView.delegate = self;
tblView.dataSource = self;
tblView.tableFooterView = UIView(frame: .zero)
tblView.separatorStyle = .singleLine
alertVC.view.addSubview(tblView)
alertVC.view.bringSubviewToFront(tblView)
alertVC.view.isUserInteractionEnabled = true
tblView.isUserInteractionEnabled = true
tblView.allowsSelection = true
self.alertController = UIAlertController(title: "Title", message: nil, preferredStyle: .alert)
alertController.setValue(alertVC, forKey: "contentViewController")
let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
alertController.addAction(cancelAction)
self.present(alertController, animated: true, completion: nil)
}