UITextField - capture return button event

问题

How can I detect when a user pressed "return" keyboard button while editing UITextField? I need to do this in order to dismiss keyboard when user pressed the "return" button.

Thanks.

回答1:

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [textField resignFirstResponder];
    return NO;
}

---

Don't forget to set the delegate in storyboard...

回答2:

Delegation is not required, here's a one-liner:

- (void)viewDidLoad {
    [textField addTarget:textField
                  action:@selector(resignFirstResponder)
        forControlEvents:UIControlEventEditingDidEndOnExit];
}

Sadly you can't directly do this in your Storyboard (you can't connect actions to the control that emits them in Storyboard), but you could do it via an intermediary action.

回答3:

SWIFT 3.0

override open func viewDidLoad() {
    super.viewDidLoad()    
    textField.addTarget(self, action: #selector(enterPressed), for: .editingDidEndOnExit)
}

in enterPressed() function put all behaviours you're after

func enterPressed(){
    //do something with typed text if needed
    textField.resignFirstResponder()
}

回答4:

You can now do this is storyboard using the sent event 'Did End On Exit'.

In your view controller subclass:

 @IBAction func textFieldDidEndOnExit(textField: UITextField) {
    textField.resignFirstResponder()
}

In your storyboard for the desired textfield:

回答5:

Swift version using UITextFieldDelegate :

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    resignFirstResponder()
    return false
}

回答6:

- (BOOL)textFieldShouldReturn:(UITextField *)txtField 
{
[txtField resignFirstResponder];
return NO;
}

When enter button is clicked then this delegate method is called.you can capture return button from this delegate method.

来源：https://stackoverflow.com/questions/976861/uitextfield-capture-return-button-event