Source of UIView Implicit Animation delay?

Try it with a single subview or with no subviews at all to make sure the delay is not caused by so many children Profile the code in Instruments to see where exactly the code lags. You might get down to some internal Core Animation function call that will hint you what’s going on Try the code without the “lot that’s going on” to make sure you’re not stepping on Core Animation’s toes with your other code Or, in short: experiment and measure, because conjectures seldom work when optimizing.

Try it with a single subview or with no subviews at all to make sure the delay is not caused by so many children. Profile the code in Instruments to see where exactly the code lags. You might get down to some internal Core Animation function call that will hint you what’s going on.

Try the code without the “lot that’s going on” to make sure you’re not stepping on Core Animation’s toes with your other code. Or, in short: experiment and measure, because conjectures seldom work when optimizing.

In your pasted block, you specify the selector animationWillStart (no colon), but later in your question, you refer to animationWillStart: (with colon). These selectors are not equivalent, so is it possible that your intended selector is never being called on account of this animation, and is being called 0.5 seconds later on account of some other animation?

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.