Question

I’m using [UIView animateWithDuration:...] for animate sequence of UIImageView views. Like this:

[UIView animateWithDuration:1.0 animations:^{
    imageView.frame = newImageRectPosition;
}completion:^(BOOL finished){
 //animate next UIImageView
}];

I need animate ‘next UIImageView’ not on completion. I need animate ‘next UIImageView’ on the middle of previous animation, not on completion. Is it possible to do so?

Answer 1

You can setup two UIView animation blocks, one which has a delay of half the duration of the first animation:

[UIView animateWithDuration:1.0 
                 animations:^{ ... }
                 completion:^(BOOL finished){ ... }
];

[UIView animateWithDuration:1.0
                      delay:0.5
                    options:UIViewAnimationCurveLinear
                 animations:^{ ... }
                 completion:^(BOOL finished) { ... }
];