今天小编给大家分享一下UIView翻转效果如何实现的相关知识点,内容详细,逻辑清晰,相信大部分人都还太了解这方面的知识,所以分享这篇文章给大家参考一下,希望大家阅读完这篇文章后有所收获,下面我们一起来了解一下吧。
新建一个view-based模板工程,在ViewController文件中添加下面的代码,即可实现翻转效果; - (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 !"); } 运行程序,点击按钮,就能看到动画效果了 下面我自己在parentView上添加了两个子视图实现动画 - (void)viewDidLoad { [super viewDidLoad]; UIView *parentView = [[UIView alloc] initWithFrame:CGRectMake(0, 150, 320, 200)]; parentView.backgroundColor = [UIColor yellowColor]; parentView.tag = 1000; UIImageView *image1 = [[UIImageView alloc] initWithFrame:CGRectMake(50, 50, 100, 100)]; image1.backgroundColor = [UIColor redColor]; image1.tag = 1001; UIImageView *image2 = [[UIImageView alloc] initWithFrame:CGRectMake(50, 50, 100, 100)]; image2.backgroundColor = [UIColor blueColor]; image2.tag = 1002; [parentView addSubview:image1]; [parentView addSubview:image2]; [self.view addSubview:parentView]; } -(IBAction)ActionFanzhuan{ CGContextRef context = UIGraphicsGetCurrentContext(); [UIView beginAnimations:nil context:context]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationDuration:1.0]; UIView *parentView = [self.view viewWithTag:1000]; [UIView setAnimationTransition: UIViewAnimationTransitionCurlDown forView:parentView cache:YES]; // [UIView setAnimationTransition: UIViewAnimationTransitionCurlUp forView:parentView cache:YES]; // [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:parentView cache:YES]; // [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:parentView cache:YES]; NSInteger purple = [[parentView subviews] indexOfObject:[parentView viewWithTag:1002]]; NSInteger maroon = [[parentView subviews] indexOfObject:[parentView viewWithTag:1001]]; [parentView exchangeSubviewAtIndex:purple withSubviewAtIndex:maroon]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(animationFinished:)]; [UIView commitAnimations]; } - (void) animationFinished: (id) sender{ NSLog(@"animationFinished !"); } 另外:之前在viewDidLoad里面写实现动画的代码,但一致未实现动画效果,原来在viewDidLoad里面执行 CGContextRef context = UIGraphicsGetCurrentContext(); 后context的指针为0
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