以前對iOS 的專場動畫一直不敢去動自定義動畫(非交互式) 怕自己搞不好，最近無事就突突一下。發(fā)現(xiàn)沒有想象的那么難?。?strong>大神就莫見笑。純屬自我學(xué)習(xí)）
儲備只是 簡單UIView動畫。僅此而已，
能看懂 代理 協(xié)議神馬的。

首先我們以PresentViewController 為例簡單說一下 蘋果自己定義了幾種動畫效果這里就不說了；上代碼！ 創(chuàng)建一個Button

- (IBAction)presentaction:(id)sender { UIViewController * vc = [[UIViewController alloc]init]; [vc.view setBackgroundColor:[UIColor yellowColor]]; 
//將呈現(xiàn)樣式選為定值型 自己定義
 [vc setModalPresentationStyle:UIModalPresentationCustom]; 
//過度代理設(shè)為自己，這里是要點！一定要制定一個代理是它的過渡動畫走它的代理。沒用過的同學(xué)可以進去看看代理方法 
[vc setTransitioningDelegate:self]; NSLog(@"%s\nvc.view:%@\nself.view:%@\nself.navigationController.view:%@",__func__,vc.view,self.view,self.navigationController.view);
 [self.navigationController presentViewController:vc animated:YES completion:^{ for(UIView * v in self.navigationController.view.subviews){ NSLog(@"%@",v); } }];
}

上面之所以打很多l(xiāng)og 是為了想弄明白一個

 UIView * containerView = [transitionContext containerView];

這個view 是個神馬鬼。下面再說
看完UIViewControllerTransitioningDelegate的同學(xué)是不是發(fā)現(xiàn)點什么。非交互轉(zhuǎn)場動畫就看前兩個就ok 交互式下次再說。

/*開始彈出時走的方法。 返回一個實現(xiàn)UIViewControllerAnimatedTransitioning的對象*/
- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source;
/*消失時走的方法。 返回一個實現(xiàn)UIViewControllerAnimatedTransitioning的對象*/
- (nullable id <UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed;

從上面可以看出不管是呈現(xiàn)還是消失都會返回一個實現(xiàn)UIViewControllerAnimatedTransitioning的對象。所以呢 我們需要創(chuàng)建一個對象實現(xiàn)UIViewControllerAnimatedTransitioning這玩意兒 點協(xié)議進去后你發(fā)現(xiàn)只有3個方法！兩個必須實現(xiàn)的！

- (NSTimeInterval)transitionDuration:(nullable id <UIViewControllerContextTransitioning>)transitionContext;
- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext;@optional- (void)animationEnded:(BOOL) transitionCompleted;

管它什么鬼先實現(xiàn)再說

- (NSTimeInterval)transitionDuration:(nullable id <UIViewControllerContextTransitioning>)transitionContext{ 
return 1;
}
- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext{}

第一個方法沒啥說的動畫時間。關(guān)鍵看第二個方法如下

- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext{
 UIView * containerView = [transitionContext containerView];
//暫時我理解為一個容器View 動畫在它內(nèi)實現(xiàn) 如有錯誤請留言打臉！小弟多謝！ 
NSLog(@"containerView:%@",containerView); UIViewController * fromeVC = 
[transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
//字面意思來自哪個VC UIViewController * toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
//字面意思將呈現(xiàn)哪個VC 
NSLog(@"fromeVC.view:%@\ntoVC.view:%@",fromeVC.view,toVC.view); 
[toVC.view setFrame:containerView.frame]; toVC.view.layer.anchorPoint = 
CGPointMake(0.5, 1); toVC.view.layer.position = CGPointMake(containerView.center.x, containerView.frame.size.height); fromeVC.view.layer.position = CGPointMake(containerView.center.x, containerView.frame.size.height); 
fromeVC.view.layer.anchorPoint = CGPointMake(0.5, 1);
 [containerView addSubview:toVC.view];
 /*動畫自己*/
 [UIView animateWithDuration:[self transitionDuration:transitionContext] animations:^{ 
[fromeVC.view setFrame:CGRectMake(20, 20, containerView.bounds.size.width-40, containerView.frame.size.height-10)]; 
toVC.view.transform = CATransform3DGetAffineTransform(CATransform3DMakeRotation(-0.5,0.3,0,0)); 
} completion:^(BOOL finished) { 
/*結(jié)束過渡*/
 [transitionContext completeTransition:YES];
 }];

然后回到剛vc 的

- (nullable id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC NS_AVAILABLE_IOS(7_0)
{ 
    vcAnimation * animation = [[vcAnimation alloc]init]; return animation;
}