iOS UIView动画01

-(void) launchButtonAnimations {

    CGRect frame =
_launchButton.frame;

    CGPoint center =
_launchButton.center;

    //首尾式动画

    [UIView
beginAnimations:nil
context:nil];

    //执行动画

   
//设置动画执行时间

    [UIView
setAnimationDuration:2.0];

    //设置代理

    [UIView
setAnimationDelegate:self];

   
//设置动画执行完毕调用的事件

    self.launchButton.center = center;

    self.launchButton.bounds =
CGRectMake(0,
0, frame.size.height, frame.size.height)
;

    [UIView
setAnimationDidStopSelector:@selector(didStopAnimation)];

    [UIView
commitAnimations];

    

}