Question

I have a button and an image. When the button is pressed and held I want the image to movie across the screen quickly. Right now after I press and hold it just moves after I let go. I need it to start moving after a certain amount of time and stop when I let go.
here is what I have:

- (IBAction)buttonDown:(id)sender
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];

    x = x + 100;
}

Answer 1

With below code, you have to push 3 seconds to move _imageView, and then the image begins moving, and when you release the button, the image stops.

- (IBAction)pushToMove:(id)sender {
    [self performSelector:@selector(move) withObject:nil afterDelay:3.0];
}

- (void)move
{
    _nt = [NSTimer scheduledTimerWithTimeInterval:0.1
                                                   target:self
                                                 selector:@selector(goRight)
                                                 userInfo:nil
                                                  repeats:YES];
}

- (void)goRight
{
    _imageView.frame = CGRectMake(_imageView.frame.origin.x + 10, _imageView.frame.origin.y,
                                  _imageView.frame.size.width, _imageView.frame.size.height);
}

- (IBAction)stop
{
    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(move) object:nil];
    [_nt invalidate];
}

I put this sample project to GitHub. You can download and just run it.

https://github.com/weed/p120804_ImageMoveDuringPushButton