How do i detect a long press?

I'开发者_运维知识库m wondering how I should go about detecting a long press on a UIButton I have? I've heard of UILongPressGestureRecognizer but am totally unsure how to use it.

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Use this:

UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(selectorname)];
[anyView addGestureRecognizer:longPressGesture];
[longPressGesture release];

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I'm not sure about the UILongPressGestureRecognizer, but you could start a NSTimer when the button is hit, and then when the timer goes off check to see if it is still down.