这样做UIView的动画

// Hide the bar button and show the view
self.navigationItem.rightBarButtonItem = nil;
[self.view viewWithTag:101].alpha = 1.0f;

// Bounce to 115% of the normal size
[UIView beginAnimations:nil context:UIGraphicsGetCurrentContext()];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.4f];
[self.view viewWithTag:101].transform = CGAffineTransformMakeScale(1.15f, 1.15f);
[UIView commitModalAnimations];

// Return back to 100%
[UIView beginAnimations:nil context:UIGraphicsGetCurrentContext()];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.3f];
[self.view viewWithTag:101].transform = CGAffineTransformMakeScale(1.0f, 1.0f);
[UIView commitModalAnimations];

// Pause for a second and appreciate the presentation
[NSThread sleepUntilDate:[NSDate dateWithTimeIntervalSinceNow:1.0f]];

// Slowly zoom back down and hide the view
[UIView beginAnimations:nil context:UIGraphicsGetCurrentContext()];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:1.0f];
[self.view viewWithTag:101].transform = CGAffineTransformMakeScale(0.01f, 0.01f);
[UIView commitModalAnimations];

// Restore the bar button
[self.view viewWithTag:101].alpha = 0.0f;