Objective C: ResignFirstResponder with a button

问题

Is there a way for a UIButton to trigger resignFirstResponder? I have my program set to do so in a function when you tap outside of a textfield, but I want the keyboard to go away when the user hits the submit button.

This is what I have for the UITextFields

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
 [x1 resignFirstResponder];
 [x2 resignFirstResponder];
 [y1 resignFirstResponder];
 [y2 resignFirstResponder];
}

回答1:

Given the existence of the method you mention, how about:

- (IBAction)solve:(id)sender {
   [x1 resignFirstResponder];
   [x2 resignFirstResponder];
   [y1 resignFirstResponder];
   [y2 resignFirstResponder];
}

来源：https://stackoverflow.com/questions/4456204/objective-c-resignfirstresponder-with-a-button