转场动画2-Pop动画

上一篇试讲push动画,这篇分解pop动画

里面关于矩阵有不懂得,参考CATransform3D 特效详解

上图(虚拟机下,图是渣渣

)

代码直接上

//

//  PopTransition.h

//  转场动画2-Pop

//

//  Created by MAc on 16/5/28.

//  Copyright © 2016年 李赵杰. All rights reserved.

//

#import <Foundation/Foundation.h>

#import <UIKit/UIKit.h>

@interface PopTransition : NSObject<UIViewControllerAnimatedTransitioning>

/** 全局上下文  */

@property (nonatomic,strong) id  transitionContext;

/** fromViewController  */

@property (nonatomic,strong) UIViewController * fromViewController;

@end

实现方法和Push里面基本一致

//

//  PopTransition.m

//  转场动画2-Pop

//

//  Created by MAc on 16/5/28.

//  Copyright © 2016年 李赵杰. All rights reserved.

//

#import "PopTransition.h"

@implementation PopTransition

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext{

    return 5.0;

}

- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext{

    _transitionContext = transitionContext;

    UIViewController * fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

    UIViewController * toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

    UIView * containerView = [transitionContext containerView];

    _fromViewController = fromViewController;

    [containerView addSubview:toViewController.view];

    [containerView addSubview:fromViewController.view];

    CATransform3D transform =CATransform3DIdentity;

    //这个值表示:  m34（透视效果，要操作的这个对象要有旋转的角度，否则没有效果。正直/负值都有意义）

    transform.m34 = - 1/1500.0;

    fromViewController.view.layer.transform = transform;

    fromViewController.view.layer.anchorPoint = CGPointMake(1, 0.5);

    fromViewController.view.layer.position =CGPointMake(CGRectGetMaxX(toViewController.view.frame),CGRectGetMidY(toViewController.view.frame));

    CABasicAnimation * animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];

    animation.duration = [self transitionDuration:transitionContext];

    animation.fromValue = @(0);

    animation.toValue =@(M_PI_2);

    animation.delegate = self;

    [fromViewController.view.layer addAnimation:animation forKey:@"rotateAnimation"];

}

-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{

    if (flag) {

        // This must be called whenever a transition completes (or is cancelled.)

        // Typically this is called by the object conforming to the

        // UIViewControllerAnimatedTransitioning protocol that was vended by the transitioning

        // delegate.  For purely interactive transitions it should be called by the

        // interaction controller. This method effectively updates internal view

        // controller state at the end of the transition.

    //意思就是:必须调用在转场动画结束时(取消),....  最后这个方法有效的更新了试图控制器中转场动画的状态

        [_transitionContext completeTransition:YES];

    }

}

@end

//

//  PopViewController.m

//  转场动画2-Pop

//

//  Created by MAc on 16/5/28.

//  Copyright © 2016年 李赵杰. All rights reserved.

//

#import "PopViewController.h"

#import "PopTransition.h"

@interface PopViewController ()<UINavigationControllerDelegate>

@end

@implementation PopViewController

- (void)viewDidAppear:(BOOL)animated{

    [super viewDidAppear:animated];

    self.navigationController.delegate = self;

}

-(void)viewDidDisappear:(BOOL)animated{

    [super viewDidDisappear:animated];

    self.navigationController.delegate =nil;

}

- (void)viewDidLoad {

    [super viewDidLoad];

      // Do any additional setup after loading the view.

}

- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC{

    if (operation == UINavigationControllerOperationPop) {

        return [[PopTransition alloc]init];

    }

    return nil;

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

/*

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    // Get the new view controller using [segue destinationViewController].

    // Pass the selected object to the new view controller.

}

*/

@end

demo地址

下一篇解析吴彦祖的手势,尽请期待

巴特西

转场动画2-Pop动画

代码直接上

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