UIImageView实现简单动画

关于ios动画，自己在以往的开发中用到的很少，这次遇到这么个需求：在一个操作完成前我需要加上动画效果，其实只是两张图片不断替换。图片当然用UIImageview加载。在请教别人之后，知道了uiimageview使用动画的方法，我又把它跟MBProgressHUD相结合使用，代码如下：

 //添加开门动画

    MBProgressHUD *
animationHud= [[MBProgressHUD
alloc]
initWithView:self.view];

    [animationHud
setRemoveFromSuperViewOnHide:YES];

    UIView *view =[[UIView
alloc]initWithFrame:CGRectMake(0,0,
57,
81)];

    UIImageView *imageview=[[UIImageView
alloc]initWithImage:[UIImage
imageNamed:@"icon_open.png"]];

    imageview.animationImages = [NSArray
arrayWithObjects: [UIImage
imageNamed:@"icon_open_noCharacter"],[UIImage
imageNamed:@"icon_close_noCharacter"],nil];

    imageview.animationDuration =
0.5f;

    imageview.animationRepeatCount =
0;    //0代表无限大

    imageview.userInteractionEnabled =
YES;

    [imageview startAnimating];

    imageview.frame=view.frame;

    [view addSubview:imageview];

    [animationHud
setCustomView:view];

    [animationHud
setMode:MBProgressHUDModeCustomView];

    [self.view
addSubview:animationHud];

    [animationHud
show:YES];