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iOS转场动画初探

一般我们就用两种转场push和present

present

 /**  1.设置代理  - (instancetype)init  {  self = [super init];  if (self) {  self.transitioningDelegate = self;  self.modalPresentationStyle = UIModalPresentationCustom;  }  return self;  }  2.添加协议<UIViewControllerTransitioningDelegate>  3.重写协议方法 － 在协议方法里面初始化  - (id<UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source{    }    - (id<UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed{    }  **/

2.push

第一个控制器推第二个控制器的时候

  　　ViewController2 *vc = [[ViewController2 alloc]init];     self.navigationController.delegate = vc; //必须写这句话     [self.navigationController pushViewController:vc animated:YES];

第二个控制器

 @interface ViewController2 : UIViewController<UINavigationControllerDelegate>  @end

代理方法

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

上面就是push和present发生的地方，都需要返回一个 UIViewControllerAnimatedTransitioning

所以我们写一个类

@interface WJTransiation_Mobile : NSObject<UIViewControllerAnimatedTransitioning>

@end

然后修改里面的协议方法

//动画时间

- (NSTimeInterval)transitionDuration:(nullable id <UIViewControllerContextTransitioning>)transitionContext;

//自定义过渡动画

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

执行过渡动画

1.获取前后控制器

  　　UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];     UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

2.获得转场动画视图

 UIView *containerView = [transitionContext containerView];

3.将前后控制器需要进行动画的视图添加到containerView上

  　　[containerView addSubview:tempView];     [containerView addSubview:toVC.view];

4.执行自己的动画

demo链接:http://pan.baidu.com/s/1kTPPUMb

效果图：

iOS转场动画初探

补：

 //动态添加transiationView属性  @interface UIViewController (transiationView)  @property (nonatomic,strong)UIView *transiationView;  @end

 #import <objc/runtime.h>  @implementation UIViewController (transiationView)  static char transiationViewKey;  - (void)setTransiationView:(UIView *)transiationView {     return objc_setAssociatedObject(self, &transiationViewKey, transiationView, OBJC_ASSOCIATION_RETAIN_NONATOMIC); }  - (UIView *)transiationView {      return objc_getAssociatedObject(self, &transiationViewKey); }  @end

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