Problems with getting text from UIAlertView textfield - ios

Question

In my application I want a alert with a textfield. After clicking on "Done" I want to save the textfield input in a String. After clicking on "Cancel" I want only to close the alert. I've created my alert like this:
var alert = UIAlertView()
alert.title = "Enter Input"
alert.addButtonWithTitle("Done")
alert.alertViewStyle = UIAlertViewStyle.PlainTextInput
alert.addButtonWithTitle("Cancel")
alert.show()
let textField = alert.textFieldAtIndex(0)
textField!.placeholder = "Enter an Item"
println(textField!.text)
The alert looks like this:
I want to know how to get the text from the textfield, and how to create events for the "Done" button and the "Cancel" button.

Answer 1

You may go with UIAlertController instead of UIAlertView.
I've already implemented and tested too using UIAlertController for what you actually want. Please try the following code
var tField: UITextField!
func configurationTextField(textField: UITextField!)
{
print("generating the TextField")
textField.placeholder = "Enter an item"
tField = textField
}
func handleCancel(alertView: UIAlertAction!)
{
print("Cancelled !!")
}
var alert = UIAlertController(title: "Enter Input", message: "", preferredStyle: .Alert)
alert.addTextFieldWithConfigurationHandler(configurationTextField)
alert.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler:handleCancel))
alert.addAction(UIAlertAction(title: "Done", style: .Default, handler:{ (UIAlertAction) in
print("Done !!")
print("Item : \(self.tField.text)")
}))
self.presentViewController(alert, animated: true, completion: {
print("completion block")
})

Answer 2

You will have to implement the UIAlertViewDelegate's
optional func alertView(_ alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int)

Answer 3

For SWIFT 3
#IBAction func ForgotPassword(_ sender: Any) {
let alertController = UIAlertController(title: "Email?", message: "Please input your email:", preferredStyle: .alert)
let confirmAction = UIAlertAction(title: "Confirm", style: .default) { (_) in
if let field = alertController.textFields![0] as? UITextField {
// store and use entered data
} else {
print("please enter email id")
}
}
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) { (_) in }
alertController.addTextField { (textField) in
textField.placeholder = "Email"
}
alertController.addAction(confirmAction)
alertController.addAction(cancelAction)
self.present(alertController, animated: true, completion: nil)
}
I hope it will help someone else :)

Answer 4

For iOS 8+ you should use UIAlertController instead of UIAlertView. To support iOS 7 you should implement (UIAlertViewDelegate):
func alertView(alertView: UIAlertView, clickedButtonAtIndex buttonIndex: Int)
{
//...
let textField = alertView.textFieldAtIndex(0)
}