Why is detecting touches getting slower and slower?

Question

In my game if I play a particular game for several times, my touches need more time to be detected. It stores all touches and then applies those touches all at the same time.

Can anybody tell me what's the problem?

In touchesBegan I wrote:

if (CGRectContainsPoint([tapView frame], [touch locationInView:self])
    && tapView.alpha == 1) {
    [self callTapCode];
}

This is the code of touchesEnded. If I tapped and release the tapped it shows one tapping event.

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    if (checkTap == TRUE && tapView.alpha == 1 )
        tap_effect_view.alpha = 0;
}

- (void)callTapCode {
    // Move player code by 6 pixels
    // not possible to write all code
}

In tapView I continuously tap. callTapCode moves the player by six pixels. But after some time my touches detected very slowly, so that the player looks like he's jumping around. I played the game continuously 15 to 16 times.

Answer 1

Try to look for any memory leaks. Maybe the iPhone has to use virtual memory a lot.

Answer 2

You might work through this tutorial to learn how to use the Leaks Instrument. This is part of the Instruments suite that comes with Xcode, which will, among other things, help you track down memory leaks and general performance issues with your application.

Answer 3

I'm afraid I have no answer but I may have a similar problem. This afternoon I noticed my app slowing down as I ran it and generated events.

It seemed to happen only for debug builds on the phone under the debugger (i.e. I can't reproduce it away from my Mac). Do you see this bahaviour on the simlator or running without attachment to the debugger?

Answer 4

Hi to all

I found the solution to my problem. In my game I had enabled the tapView.multipleTouchEnabled = TRUE

tapView is the view where I was continuously tapping.

When I make it FALSE it works.

i.e.

tapView.multipleTouchEnabled = FALSE;

I exactly dont know how. But it works.

Thanks for the replies.