Swift Reload textfield from button action - iphone

Question

I have a button that creates many more buttons with a textfield:
func CreateButtonWithIndex(index:Int) {
let newButton = UIButton.buttonWithType(UIButtonType.System) as UIButton
newButton.setTitle(“Button”, forState: UIControlState.Normal)
newButton.addTarget(self, action: Selector("go:"), forControlEvents: UIControlEvents.TouchUpInside)
newButton.tag = index+1;
var textFieldButton: UITextField = UITextField()
textFieldButton.tag = index+1;
textFieldButton.text = “textfield”
self.view.addSubview(textFieldButton)
self.view.addSubview(newButton)
}
func go(sender: AnyObject) {
println(“ok press button“)
}
How can I detect the textfield corresponding to the button pressed?

Answer 1

convert the sender into a UIButton
#IBAction func go(sender: AnyObject) {
let yourButton = sender as UIButton
println(yourButton.titleLabel.text)
}
Even better, if you're certain that only buttons are going to call the "go" action, you could instead do this:
#IBAction func go(sender: UIButton) {
println(sender.titleLabel.text)
if(sender.titleLabel.text == "OK")
println("OK button was pressed")
}
And more information can be found in the "Comparing Strings" section of Apple's Strings & Characters Swift documentation and the #IBOutlet thing I found in this tutorial.

Answer 2

Subclass UIButton. Add a UITextField variable to the subclassed UIButton. Assign the new UITextField variable after you create the UIButton subclass.
UIButton subclass:
class TextFieldButton: UIButton {
var textField: UITextField! // use this to reference the related text field
}
The code in your other class:
func CreateButtonWithIndex(index:Int) {
let newButton = UIButton.buttonWithType(UIButtonType.System) as TextFieldButton // use our new subclass
newButton.setTitle(“Button”, forState: UIControlState.Normal)
newButton.addTarget(self, action: Selector("go:"), forControlEvents: UIControlEvents.TouchUpInside)
newButton.tag = index+1;
var textFieldButton: UITextField = UITextField()
textFieldButton.tag = index+1;
textFieldButton.text = "textfield"
newButton.textField = textFieldButton // set reference to the text field
self.view.addSubview(textFieldButton)
self.view.addSubview(newButton)
}
func go(sender: AnyObject) {
println("ok press button")
println(sender.textField) // now we can access the related text field
}