iOS Move Button to front programmatically

[nickculbertson]

Hello,
I have a number of UIButtons moving in an animation where they overlap. Is there a way to programmatically move one button in front of another when passing a given coordinate?

- (IBAction) onTimer1 {
	button1.center = CGPointMake(button1.center.x+pos1.x,button1.center.y+pos1.y);
	
	if (button1.center.x > 270|| button1.center.x+pos1.y < 55) 
		pos1.x = -pos1.x;
	if (button1.center.y > 400|| button1.center.y+pos1.y < 292.5) 
		pos1.y = -pos1.y;
	if (button1.center.y > 395)
		button1.transform = CGAffineTransformMakeScale(1, 1);
//Here is where I want to move to front.
	if (button1.center.y < 394)
		button1.transform = CGAffineTransformMakeScale(.5, .5); //...
//Here is where I want to move to back.
}

Thanks,
Nick

 

[robbieduncan]

The only way I can think of doing it would be to alter the zPosition property of the buttons layer to position it above the other buttons.

 

[dejo]

Well, there's the possibility of UIView's bringSubviewToFront:

 

[nickculbertson]

The only way I can think of doing it would be to alter the zPosition property of the buttons layer to position it above the other buttons.

Thank you, Sir. That seemed to do the trick.

- (IBAction) onTimer1 {
	button1.center = CGPointMake(button1.center.x+pos1.x,button1.center.y+pos1.y);
	
	if (button1.center.x > 270|| button1.center.x+pos1.y < 55) 
		pos1.x = -pos1.x;
	if (button1.center.y > 400|| button1.center.y+pos1.y < 292.5) 
		pos1.y = -pos1.y;
	if (button1.center.y > 395){
		button1.transform = CGAffineTransformMakeScale(1, 1);
button1.layer.zPosition=5.0f;
}
	if (button1.center.y < 394){
		button1.transform = CGAffineTransformMakeScale(.5, .5); //...
button1.layer.zPosition=-5.0f;
}
}

Nick

 

[robbieduncan]

Well, there's the possibility of UIView's bringSubviewToFront:

I suspect that does the same thing in one handy call so is probably a better option, yes

 

[dejo]

I suspect that does the same thing in one handy call so is probably a better option, yes

Yeah, I wasn't sure if the OP was wanting to move the view to the very front or just higher up in the z-index, so that's why I said "possibly".