NSOperation for animation loop causes strange scrolling behaviour
- by Tricky
Hi,
I've created an animation loop which I run as an operation in order to keep the rest of my interface responsive. Whilst almost there, there is still one remaining issue. My UIScrollViews don't seem to be reliably picking up when a user touch ends. What this means is, for example, if a user drags down on a scroll view, when they lift their fingers the scrollview doesn't bounce back into place and the scrollbar remains visible. As if the finger hasn't left the screen. It takes another tap on the scrollview for it to snap to its correct position and the scrollbar to fade away...
Here's the loop I created in a subclassed NSOperation:
(void)main
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
_displayLink = [[CADisplayLink displayLinkWithTarget: self selector: @selector(animationLoop:)] retain];
[_displayLink setFrameInterval: 1.0f];
[_displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode: NSRunLoopCommonModes];
while (![self isCancelled])
{
NSAutoreleasePool *loopPool = [[NSAutoreleasePool alloc] init];
[runLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
[loopPool drain];
}
[_displayLink invalidate];
[pool release];
}
DOes anyone have any idea what might be going on here, and even better how to fix it...
Thanks!
