How to stop the UITextField from responding to the

问题:

By default, if you shake the iPhone while entering text in a UITextField, a little box will appear asking if you want to undo typing. How can I prevent this from happening? I looked through the UITextField, UITextFieldDelegate, and UITextInputTraits docs and found nothing relating to shaking.

Presumably I could subclass UITextField to ignore the shake event, but I'm not exactly confident in my ability to not screw other things up. I'd love something like

textField.respondsToShake = FALSE;

What's the best way to do this?

回答1:

[UIApplication sharedApplication].applicationSupportsShakeToEdit = NO;

回答2:

You could try to subclass UITextField and override canPerformAction:withSender: in such a way that it will disallow the undo: action. But then you lose undo both by shaking and through the context menu.