UIView animation block: if duration is 0, is it the same as without animation?

Question

I need to handle a case where you can do something with or without animation, instead of:

if (animation)
{
    [UIView animateWithBlock:^(){...}];
}
else
{
    ...
}

I want to do:

[UIView animateWithBlock:^(){...} duration:(animation ? duration : 0)]

but not sure if it works, even if it does, is there any overhead for using this instead of directly change the view?

Thanks

Answer 1

What I do in this cases, is to create a block that contains all the animations I want to make. Then execute an UIView animation passing the animation block as a parameter, or directly calling that block, whether I want it to be animated or not. Something like this :

void (^animationBlock)();
animationBlock=^{
      // Your animation code goes here
};
if (animated) {
    [UIView animateWithDuration:0.3 animations:animationBlock completion:^(BOOL finished) {

    }];
}else{
    animationBlock();
}

That would avoid the overhead

Answer 2

According to the Apple docs:

If the duration of the animation is 0, this block is performed at the beginning of the next run loop cycle.