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引入    #import <QuartzCore/QuartzCore.h>

公有方法实现

[UIView beginAnimations:@"animationID"context:nil];

[UIView setAnimationDuration:1.0f];

[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

[UIView setAnimationRepeatAutoreverses:NO];

[UIView setAnimationTransition:UIViewAnimationTransitionCurlDownforView:subview2cache:YES];

//最后启动动画

[UIViewcommitAnimations];

以下是私有方法实现

// CATransition *transition = [CATransition animation];

// transition.duration = 1.0f;

// transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

// transition.type = @"pageUnCurl";

// transition.subtype = kCATransitionFromRight;

// transition.delegate = subview2.layer;

// [subview2.layer addAnimation:transition forKey:nil];

函数讲解

//首先设置动画的相关参数

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