iOS7使用代理自定义导航转场动画

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如果你已经厌倦了使用UINavigationController进行简单粗暴的push和pop转场操作，你完全可以使用自定义的导航转场效果，iOS7提供了许多漂亮的代理方法帮助你实现各种自定义动画，下面演示一个简单的导航转场动画Demo的实现过程，效果如图一所示：

STEP 1：创建一个项目，其中包含，一个名为FirstViewController和一个SecondViewController的视图控制器，两个继承自NSObject的PopAnimation和PushAnimation类。

STEP2：使用UIViewControllerAnimatiedTransitioning代理方法自定义Push 动画

1.）让PopAnimation使用UIViewControllerAnimatedTransitioning代理的方法：

@interface PushAnimation : NSObject <UIViewControllerAnimatedTransitioning>

2.）PopAnimation的实现

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {        UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];    UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];        [[transitionContext containerView] addSubview:toViewController.view];    toViewController.view.alpha = 0;      [UIView animateWithDuration:0.3*[self transitionDuration:transitionContext]  animations:^{        fromViewController.view.transform = CGAffineTransformMakeScale(0.6, 0.6);        toViewController.view.alpha = 0.3;    } completion:^(BOOL finished) {                [UIView animateWithDuration:0.3*[self transitionDuration:transitionContext]  animations:^{                        fromViewController.view.transform = CGAffineTransformMakeScale(1.1, 1.1);            toViewController.view.alpha = 0.6;        } completion:^(BOOL finished){                        [UIView animateWithDuration:0.4*[self transitionDuration:transitionContext] animations:^{                                fromViewController.view.transform = CGAffineTransformMakeScale(0.1, 0.1);                toViewController.view.alpha = 1.0;            } completion:^(BOOL finished){                                fromViewController.view.transform = CGAffineTransformIdentity;                [transitionContext completeTransition:![transitionContext transitionWasCancelled]];            }];                  }];    }];}

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext {    return 3.0f;}

STEP 3：使用UIViewControllerAnimatiedTransitioning代理方法自定义Pop 动画

@interface PopAnimation : NSObject <UIViewControllerAnimatedTransitioning>

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext {            UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];    UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];        [[transitionContext containerView] addSubview:toViewController.view];        toViewController.view.alpha = 0;    toViewController.view.transform = CGAffineTransformMakeScale(0.1, 0.1);    [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{        toViewController.view.transform = CGAffineTransformMakeScale(1.0, 1.0);        toViewController.view.alpha = 1.0f;        fromViewController.view.alpha = 0.0f;        } completion:^(BOOL finished) {        fromViewController.view.transform = CGAffineTransformIdentity;        [transitionContext completeTransition:![transitionContext transitionWasCancelled]];            }];}- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext {    return 3.0f;}

STEP4：在FirstViewController中实现UINavigationControllerDelegate的一些方法

#import "PushAnimation.h"@interface FirstViewController : UIViewController <UINavigationControllerDelegate>@property (nonatomic, strong) PushAnimation *animation;

- (void)viewDidLoad{    [super viewDidLoad];    _animation = [PushAnimation new];        //隐藏NavigationBar    self.navigationController.navigationBarHidden = YES;        //设置背景图片    UIImageView *imageView = [[UIImageView alloc]initWithFrame:self.view.frame];    [imageView setImage:[UIImage imageNamed:@"1.jpg"]];    [self.view addSubview:imageView];        //定义一个button    UIButton *pushBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];    pushBtn.frame = CGRectMake(284, 700, 200, 40);    [pushBtn setTitle:@"push" forState:UIControlStateNormal];    pushBtn.titleLabel.font = [UIFont systemFontOfSize:32.0f];    [pushBtn addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];        [self.view addSubview:pushBtn];    }- (void)viewDidAppear:(BOOL)animated {    [super viewDidAppear:animated];    self.navigationController.delegate = self;}- (void)viewWillDisappear:(BOOL)animated {    [super viewWillDisappear:animated];    if (self.navigationController.delegate == self) {        self.navigationController.delegate = nil;    }}- (void)buttonClicked:(id)sender {        SecondViewController *presentController = [[SecondViewController alloc]init];        [self.navigationController pushViewController:presentController animated:YES];}#pragma mask UINavigationControllerDelegate- (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController                                   animationControllerForOperation:(UINavigationControllerOperation)operation                                                fromViewController:(UIViewController *)fromVC                                                  toViewController:(UIViewController *)toVC {    if (operation == UINavigationControllerOperationPush) {        return self.animation;    }    return nil;}

STEP5：在SecondViewController中调用PopAnimation动画

@interface SecondViewController : UIViewController <UINavigationControllerDelegate>@property(nonatomic, strong) PopAnimation *animation;

- (void)viewDidLoad{    [super viewDidLoad];        _animation = [PopAnimation new];        //隐藏NavigationBar    self.navigationController.navigationBarHidden = YES;        //设置背景图片    UIImageView *imageView = [[UIImageView alloc]initWithFrame:self.view.frame];    [imageView setImage:[UIImage imageNamed:@"2.jpg"]];    [self.view addSubview:imageView];        //定义一个button    UIButton *pushBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];    pushBtn.frame = CGRectMake(284, 700, 200, 40);    [pushBtn setTitle:@"Pop" forState:UIControlStateNormal];    pushBtn.titleLabel.font = [UIFont systemFontOfSize:32.0f];    [pushBtn addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];        [self.view addSubview:pushBtn];    }- (void)viewDidAppear:(BOOL)animated {    [super viewDidAppear:animated];    self.navigationController.delegate = self;}- (void)viewWillDisappear:(BOOL)animated {    [super viewWillDisappear:animated];    if (self.navigationController.delegate == self) {        self.navigationController.delegate = nil;    }}- (void)buttonClicked:(id)sender {            [self.navigationController popViewControllerAnimated:YES];    }#pragma mask UINavigationControllerDelegate- (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController                                   animationControllerForOperation:(UINavigationControllerOperation)operation                                                fromViewController:(UIViewController *)fromVC                                                  toViewController:(UIViewController *)toVC {    if (operation == UINavigationControllerOperationPop) {        return self.animation;    }    return nil;}

STEP6： Over 了

源码下载地址： http://download.csdn.net/detail/luozhonglan/7979545

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