iphone - Is there a way to force Core Animation to run it's thread?

Question

Core Animation uses a background thread to do it's job. Now the problem is this: I have a heavy calculation going on in the main thread. Core Animation immediately freezes until that calculation is done. And then it continues to finish it's animations. I remember reading in a document that CA has a low priority in processing time, meaning that whatever the main thread wants to do is high-prio and will be done more likely than any fancy animation at the same time.

I want to force Core Animation to schedule it's background thread nicely with the main thread under any circumstances. Or alternatively a separate thread that will run the heavy calculation outside the main thread. I tried that already, but CA still freezes until that's done. I expect the scheduler to switch processing time quickly between CA and that calculation.

How could CA be forced to keep on working? If things go just a bit slower than, that's fine. But most important thing is that all things keep on going from the users point of view.

Answer 1

You can use [CATransaction flush] to flush core animation if you don't let the runloop take its course