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detecting touch and hold vs touch in UIButton
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detecting touch and hold vs touch in UIButton


  • Subject: detecting touch and hold vs touch in UIButton
  • From: Alejandro Marcos Aragón <email@hidden>
  • Date: Fri, 4 Jun 2010 21:16:50 -0500

Hi all,

I've been trying to detect touch and hold vs touch on a subclass of UIButton. I basically accomplished that by doing the following:

I first add the following when the button is created:


	[button addTarget:self action:@selector(sourceSelected:)
		forControlEvents:UIControlEventTouchUpInside];
	[button addTarget:self action:@selector(sourceTouchDown:)
		forControlEvents:UIControlEventTouchDown];

Then in the functions:

- (void) sourceSelected:(UIButton*) sender {


	// cancel request for extended meny
	[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(sourceSelectedExtended:) object:sender];
	...
}

- (void) sourceTouchDown:(UIButton*) sender {

	// give time before performing action
	[self performSelector:@selector(sourceSelectedExtended:) withObject:sender afterDelay:0.5];
}

- (void) sourceSelectedExtended:(UIButton*) sender {

	// remove action from button
	[sender removeTarget:self action:@selector(sourceSelected:) forControlEvents:UIControlEventTouchUpInside];
	...
	...
	// give time before performing action
	[self performSelector:@selector(addSourceAction:) withObject:sender afterDelay:1.];

}

- (void) addSourceAction:(UIButton*)sender {

	// remove action from button
	[sender addTarget:self action:@selector(sourceSelected:) forControlEvents:UIControlEventTouchUpInside];

}



Now, this works fine, but then I thought there must be an easier (and definitely more elegant) way to accomplish the same thing.

Can someone through me a line here?

Thank you all,

aa


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