UIView Transform - Performance Memory issue

[Jecht]

Hi All~

I have this animation. Basically the a "pin" image just rotates left and right slowly. Here's my animation code:

- (void)pinAnimation{
// Blah blah calculate rotation

compassPin.superview.transform = CGAffineTransformMakeRotation(PI*rotation);
}

And this animation is called by the timer:
pinAnimationTimer = [NSTimer scheduledTimerWithTimeInterval:0.1
target:self
selector:@selector(pinAnimation)
userInfo:nil repeats:YES];

Using instrument, the memory usage keeps on going up on its own. And the weird thing is, when I remove the compassPin.superview.transform... code, the memory remains constant. Why would this transform add up the memory usage? And how do I fix this?

Thanks so much

[smasher]

If it all generalblocks? Your code looks fine, assuming you're only calling scheduledTimerWithTimeInterval once.

Turn on the "Memory Monitor" instrument and see the memory usage of your app is really increasing or not. According to apple, there's a bug in ObjectAlloc that get triggered by quartz calls:

https://devforums.apple.com/message/88251

[Jecht]

Hey~

Thanks for the reply. I only called scheduledTimerWithTimeInterval once but the memory usage is still going crazy. I think I might need to just not have that animation in my app.

Originally Posted by smasher

If it all generalblocks? Your code looks fine, assuming you're only calling scheduledTimerWithTimeInterval once.

Turn on the "Memory Monitor" instrument and see the memory usage of your app is really increasing or not. According to apple, there's a bug in ObjectAlloc that get triggered by quartz calls:

https://devforums.apple.com/message/88251