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];

    

}