//animateWithDuration用1秒钟的时间，执行代码
    [UIView animateWithDuration:1.0 animations:^{
      
        //存放需要执行的动画代码
        self.iconBtn.frame=CGRectMake(83,85,150,150);
        self.cover.alpha=0.0;//设置控件的透明度
    } completion:^(BOOL finished) {
        //动画执行完毕后会自动调用这个block内部的代码
        [self.cover removeFromSuperview];
        self.cover=nil;
    }];

  //执行动画代码
   [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(removerCover)];
    
    
    self.iconBtn.frame=CGRectMake(85, 85,150,  150);
    self.cover.alpha=0.0;
    [UIView commitAnimations];
    
    
}

-(void)removerCover
{
        [self.cover removeFromSuperview];
        self.cover=nil;
}