UITextField in UIAlertView on iPhone - how to make it responsive?

Question

I placed a UITextField into a UIAlertView and moved it up so the keyboard wouldn\'t cover it up with the following code:

[dialog setDelegate:self];
[dialog s         


        

Answer 1

A quite nice approach is, you can use the delegate methods of the UITextFieldDelegate to move the dialog up only when the keyboard is activated. See below.

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationDelegate:self];

    CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, -20);
    [dialog setTransform: moveUp];

    [UIView commitAnimations];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationDelegate:self];

    CGAffineTransform moveDown = CGAffineTransformMakeTranslation(0.0, 0.0);
    [dialog setTransform: moveDown];

    [textField resignFirstResponder];

    return YES;
}