Error showing a UIAlertView in swift

Question

Im trying to show a UIAlertView in my swift App

    alert = UIAlertView(title: \"\",
        message: \"bla\",
        delegate: self,
        cancelButtonTitle:         


        

Answer 1

Swift 5

You should do it this way:

let alert = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Button", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)

Answer 2

let alert = UIAlertController(title: "Title", message: "Message", preferredStyle: UIAlertController.Style.alert)
                    alert.addAction(UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: nil))
                    self.present(alert, animated: true, completion: nil)

Answer 3

This is what I have used to make an alert popup in swift.

let myAlert = UIAlertView(title: "Invalid Login",     
message: "Please enter valid user name",       
delegate: nil, cancelButtonTitle: "Try Again") 
myAlert.show()

Answer 4

Even though UIAlertView is depreciated in iOS8, you can get away with using it but not through it's init function. For example:

    var alert = UIAlertView()
    alert.title = "Title"
    alert.message = "message"
    alert.show()

Atleast this is the only way so far I've been able to successfully use an UIAlertView. I'm unsure on how safe this is though.

Answer 5

I was successfully able to show a UIAlertView using this code:

var alert = UIAlertView()
alert.title = "Title"
alert.message = "Message"
alert.addButtonWithTitle("Understood")
alert.show()

The code "alert.addButtonWithTitle("Understood")" adds a button for the user to push after they have read the error message.

Hope this helps you.

Answer 6

var 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)

To handle actions:

alert.addAction(UIAlertAction(title: "Ok", style: .Default, handler: { 
    action in switch action.style {
    case .Default:
        println("default")
    case .Cancel:
        println("cancel")
    case .Destructive:
        println("destructive")
    }
}))