UIViewAnimation blocks user interaction

Question

I have a UIView following the users finger as they move it around inside my app. Sometimes, other things on screen are animating with UIViewAnimation blocks, but this freezes the tracking of their finger, so if they continue moving their finger during the animation, it won't follow. How can i stop the animation from blocking up the main thread?

Answer 1

Try using UIViewAnimationOptionAllowUserInteraction with [UIView animateWithDuration:delay:options:animations:completion:]

Answer 2

you can use the NSObject's method: performSelector:onThread:withObject:waitUntilDone:

More details in Apple NSObject Documentation