UIView 实现翻转效果

代码：

• (void)viewDidLoad {
  [super viewDidLoad];
  //需要翻转的视图
  UIView *parentView = [[UIView alloc] initWithFrame:CGRectMake(0, 150, 320, 200)];
  parentView.backgroundColor = [UIColor yellowColor];
  parentView.tag = 1000;
  [self.view addSubview:parentView];
  }
  //需要在h头文件声明下面的动作响应函数
  //在xib文件中添加一个button，其响应函数为下面的函数
  //运行程序后，点击button就看到翻转效果
  -(IBAction)ActionFanzhuan{
  //获取当前画图的设备上下文
  CGContextRef context = UIGraphicsGetCurrentContext();
  //开始准备动画
  [UIView beginAnimations:nil context:context];
  //设置动画曲线，翻译不准，见苹果官方文档
  [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
  //设置动画持续时间
  [UIView setAnimationDuration:1.0];
  //因为没给viewController类添加成员变量，所以用下面方法得到viewDidLoad添加的子视图
  UIView *parentView = [self.view viewWithTag:1000];
  //设置动画效果
  [UIView setAnimationTransition: UIViewAnimationTransitionCurlDown forView:parentView cache:YES]; //从上向下
  // [UIView setAnimationTransition: UIViewAnimationTransitionCurlUp forView:parentView cache:YES]; //从下向上
  // [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:parentView cache:YES]; //从左向右
  // [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:parentView cache:YES];//从右向左
  //设置动画委托
  [UIView setAnimationDelegate:self];
  //当动画执行结束，执行animationFinished方法
  [UIView setAnimationDidStopSelector:@selector(animationFinished:)];
  //提交动画
  [UIView commitAnimations];
  }

//动画效果执行完毕

• (void) animationFinished: (id) sender{
  NSLog(@"animationFinished !");
  }