How to get source (sender) for an event in Swift

Question

I have a function

@IBAction func fblogin(sender: AnyObject) {
println (sender)
}

The action of two button is this function. If I print sender nil gets printer. How do I check which button called it. Do I need to create outlet for buttons or how do I create ids for buttons?

Answer 1

You could use sender 's tag value

Just connect both buttons to your action, and check with:

    if(sender.tag == 1) {
    ... button 1
    } else if( sender.tag == 2) {
    .. button 2
    }

And use sender from type UIButton (you can select it directly in Xcode too)

• how set tag value？
  • code
    • someBtn.tag = 1;
      • normally inside ViewDidLoad
  • UI
    • XCode->Storyboard->select UI (your UIButton) -> right side panel(Inspector) -> Attribute Inspector -> View -> Tag
      •