Press and hold to make Image move - objective-c

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

Answer 2

This can be done in interface builder by simply liking to the buttons touch down property instead of touch up inside. In code it looks like this:
[myButton addTarget:self action:#selector(myMethod) forControlEvents:UIControlEventTouchDown];
In addition to this, you'll want to do some state checking on your animation, and use UIViewAnimationOptionBeginFromCurrentState as an option to help it pick up where it left off when the user presses the button again.