animation similar to opening app in ios7

Question

I want to create an animation similar to app opens in iPhone in iOS7. In this animation it just shows that app is opening from which point and closing at same point.

Answer 1

I personally prefer to use CGAffineTransformMakeScale() and setting -[CALayer affineTransform] in this case.

affineTransform is super easy to use and comes with a few nice, implicit benefits from Core Animation. Examples being that does things like handling of changing the frame's origin for you implicitly and making it really easy to reset back to the initial size if needed -- you never lost it in the first place!

[UIView animateWithDuration:0.3 animations:^{
    view.layer.affineTransform = CGAffineTransformMakeScale(10.0, 10.0); // To make a view larger:
    otherView.layer.affineTransform = CGAffineTransformMakeScale(0.0, 0.0); // to make a view smaller
}];

and

// To reset views back to their initial size after changing their sizes:
[UIView animateWithDuration:0.3 animations:^{
    view.layer.affineTransform = CGAffineTransformIdentity;
    otherView.layer.affineTransform = CGAffineTransformIdentity;
}];