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  • Objective c 还原iOS7之前的UINavigationController pushViewController动画

Objective c 还原iOS7之前的UINavigationController pushViewController动画

objective-c animation ios7

Objective c 还原iOS7之前的UINavigationController pushViewController动画,objective-c,animation,uinavigationcontroller,ios7,pushviewcontroller,Objective C,Animation,Uinavigationcontroller,Ios7,Pushviewcontroller,所以。刚开始将我的IOS代码转换到IOS7，遇到了一些问题 我有一个UINavigationController，它有子视图控制器，我正在使用pushViewController显示下一个视图。若要使用一组图像创建视差动画，请自定义UINavigationController以设置一组UIImageViews的动画，并且我的子视图控制器都具有self.backgroundColor=[UIColor clearColor]，透明度 自iOS7以来，UINavController通过部分移动当前视

所以。刚开始将我的IOS代码转换到IOS7，遇到了一些问题

我有一个
UINavigationController
，它有子视图控制器，我正在使用
pushViewController
显示下一个视图。若要使用一组图像创建视差动画，请自定义
UINavigationController
以设置一组
UIImageViews
的动画，并且我的子视图控制器都具有
self.backgroundColor=[UIColor clearColor]
，透明度

自iOS7以来，
UINavController
通过部分移动当前视图控制器并在顶部按下新的viewcontroller来更新其子vc的动画方式，我的视差动画看起来糟透了。我看到以前的VC移动了一点，然后消失了。是否有任何方法可以恢复以前的
UINavigationController
pushViewController动画？我似乎在代码中找不到这个

WelcomeLoginViewController* welcomeLoginViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"WelcomeLogin"];
    [self.navigationController pushViewController:welcomeLoginViewController animated:YES];
甚至尝试使用：

    [UIView animateWithDuration:0.75
                     animations:^{
                         [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
                         [self.navigationController pushViewController:welcomeLoginViewController animated:NO];
                         [UIView setAnimationTransition:<specific_animation_form> forView:self.navigationController.view cache:NO];
                     }];

[UIView animateWithDuration:0.75
动画：^{
[UIView设置动画曲线：UIViewAnimationCurveEaseInOut]；
[self.navigationController pushview控制器：welcomeLoginViewController动画：否]；
[UIView setAnimationTransition:forView:self.navigationController.view缓存：否]；
}];
有人有任何线索吗？

我通过为
UINavigationController
创建一个类别，设法绕过了新的转换类型。在我的例子中，我需要将其恢复为旧的过渡样式，因为我有透明的ViewController，可以在静态背景上滑动

  • UINavigationController+Retro.h

    @interface UINavigationController (Retro)

- (void)pushViewControllerRetro:(UIViewController *)viewController;
- (void)popViewControllerRetro;

@end
  • UINavigationController+Retro.m

    #import "UINavigationController+Retro.h"

@implementation UINavigationController (Retro)

- (void)pushViewControllerRetro:(UIViewController *)viewController {
    CATransition *transition = [CATransition animation];
    transition.duration = 0.25;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromRight;
    [self.view.layer addAnimation:transition forKey:nil];

    [self pushViewController:viewController animated:NO];
}

- (void)popViewControllerRetro {
    CATransition *transition = [CATransition animation];
    transition.duration = 0.25;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromLeft;
    [self.view.layer addAnimation:transition forKey:nil];

    [self popViewControllerAnimated:NO];
}

@end
      • 感谢各位的反馈。找到了完全重新创建UINavigationController行为的解决方案。当我快做完的时候，我遇到了尼克·洛克伍德的解决方案：

      OSNavigationController是UINavigationController的开源重新实现。它目前只具有UINavigationController功能的一个子集，但长期目标是复制100%的功能

      OSNavigationController实际上并不打算按原样使用。这样做的目的是，您可以将其分叉，然后轻松定制其外观和行为，以满足您的应用程序可能具有的任何特殊要求。自定义OSNavigationController比尝试自定义UINavigationController简单得多，因为代码是开放的，您不需要担心私有方法、未记录的行为或版本之间的实现更改

      通过用他的代码覆盖我的UINavigationController，我能够在UINavigationcontrollers中处理背景图像

      谢谢

      显然，在iOS7中，有一种新的方式定义您自己的自定义UIViewController转换。在文档中查找UIViewControllerTransitioningDelegate。另外，这里还有一个关于它的文章链接：

      找到了另一个很好的帮助资源：

      使用iOS7 TLTransitionAnimator创建自定义动画时，我遇到了一个问题，当UIViewController a使用pushViewController来推UIViewController B时，推送动画将在25%左右停止，然后在剩余的过程中滑动B

      这在iOS 6上没有发生，但当我开始在XCode 5中使用iOS 7作为基本SDK时，这种情况就开始发生了

      修复方法是视图控制器B在其根视图上没有设置backgroundColor（根视图是通常在loadView中设置的viewController.view的值）。在根视图的初始值设定项中设置backgroundColor修复了该问题

      我成功地解决了这个问题，如下所示：

      // CASE 1: The root view for a UIViewController subclass that had a halting animation

- (id)initWithFrame:(CGRect)frame

{

     if ((self = [super initWithFrame:frame])) {

          // Do some initialization ...

          // self.backgroundColor was NOT being set

          // and animation in pushViewController was slow and stopped at 25% and paused

     }

     return self;

}

// CASE 2: HERE IS THE FIX

- (id)initWithFrame:(CGRect)frame

{

     if ((self = [super initWithFrame:frame])) {

          // Do some initialization ...

          // Set self.backgroundColor for the fix!

          // and animation in pushViewController is no longer slow and and no longer stopped at 25% and paused

          self.backgroundColor = [UIColor whiteColor]; // or some other non-clear color

     }

     return self;

}
      首先，我不使用故事板。我尝试使用UINavigationController+Retro。出于某种原因，UINavigationController很难在堆栈顶部释放UIViewController。以下是使用iOS 7自定义转换为我提供的解决方案

    • 将委托设置为self

      navigationController.delegate = self;
    • 声明此UINavigationControllerDelegate

      - (id<UIViewControllerAnimatedTransitioning>)navigationController (UINavigationController *)navigationController 
animationControllerForOperation:(UINavigationControllerOperation)operation
fromViewController:(UIViewController *)fromVC 
toViewController:(UIViewController *)toVC 
{
    TransitionAnimator *animator = [TransitionAnimator new]; 
    animator.presenting = YES;
    return animator;
}
    • 创建扩展NSObject的animator类。我叫我的TransitionAnimator，它是从TeehanLax的TLTransitionAnimator内部修改而来的

      过渡反应器

      #import <Foundation/Foundation.h>
@interface TransitionAnimator : NSObject <UIViewControllerAnimatedTransitioning>
@property (nonatomic, assign, getter = isPresenting) BOOL presenting;
@end

      #导入
@接口TransitionAnimator:NSObject
@属性（非原子、赋值、getter=isPresenting）布尔呈现；
@结束
      传递函数

      #import "TransitionAnimator.h"
@implementation TransitionAnimator
- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
    return 0.5f;
}
- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext{
    UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];    
    if (self.presenting) {
        //ANIMATE VC ENTERING FROM THE RIGHT SIDE OF THE SCREEN
        [transitionContext.containerView addSubview:fromVC.view];
        [transitionContext.containerView addSubview:toVC.view];     
        toVC.view.frame = CGRectMake(0, 0, 2*APP_W0, APP_H0); //SET ORIGINAL POSITION toVC OFF TO THE RIGHT                
        [UIView animateWithDuration:[self transitionDuration:transitionContext] 
            animations:^{
                fromVC.view.frame = CGRectMake(0, (-1)*APP_W0, APP_W0, APP_H0); //MOVE fromVC OFF TO THE LEFT
                toVC.view.frame = CGRectMake(0, 0, APP_W0, APP_H0); //ANIMATE toVC IN TO OCCUPY THE SCREEN
            } completion:^(BOOL finished) {
                [transitionContext completeTransition:YES];
            }];
    }else{
        //ANIMATE VC EXITING TO THE RIGHT SIDE OF THE SCREEN
    }
}
@end

      #导入“TransitionAnimator.h”
@实现传递器
-（NSTimeInterval）transitionDuration：（id）transitionContext{
返回0.5f；
}
-（void）animateTransfion:（id）transitionContext{
UIViewController*fromVC=[transitionContext ViewControllerWorky:UITransitionContextFromViewControllerKey]；
UIViewController*toVC=[transitionContext ViewControllerWorky:UITransitionContextToViewControllerKey]；
如果（自我介绍）{
//设置VC从屏幕右侧进入的动画
[transitionContext.containerView添加子视图：fromVC.view]；
[transitionContext.containerView添加子视图：toVC.view]；
toVC.view.frame=CGRectMake（0,0,2*APP_W0，APP_H0）；//将原始位置设置为右侧的VC OFF
[UIView animateWithDuration:[自转换持续时间：转换上下文]
动画：^{
fromVC.view.frame=CGRectMake（0，（-1）*APP_W0，APP_W0，APP_H0）；//将fromVC移到左侧
toVC.view.frame=CGRectMake（0,0，APP_W0，APP_H0）；//设置toVC的动画以占据屏幕
}完成：^（布尔完成）{
[transitionContext completeTransition:是]；
}];
}否则{
//设置VC退出到屏幕右侧的动画
}
}
@结束
      使用presenting flag可设置要设置动画的方向或您喜欢的条件 
      #import "TransitionAnimator.h"
@implementation TransitionAnimator
- (NSTimeInterval)transitionDuration:(id <UIViewControllerContextTransitioning>)transitionContext {
    return 0.5f;
}
- (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionContext{
    UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];    
    if (self.presenting) {
        //ANIMATE VC ENTERING FROM THE RIGHT SIDE OF THE SCREEN
        [transitionContext.containerView addSubview:fromVC.view];
        [transitionContext.containerView addSubview:toVC.view];     
        toVC.view.frame = CGRectMake(0, 0, 2*APP_W0, APP_H0); //SET ORIGINAL POSITION toVC OFF TO THE RIGHT                
        [UIView animateWithDuration:[self transitionDuration:transitionContext] 
            animations:^{
                fromVC.view.frame = CGRectMake(0, (-1)*APP_W0, APP_W0, APP_H0); //MOVE fromVC OFF TO THE LEFT
                toVC.view.frame = CGRectMake(0, 0, APP_W0, APP_H0); //ANIMATE toVC IN TO OCCUPY THE SCREEN
            } completion:^(BOOL finished) {
                [transitionContext completeTransition:YES];
            }];
    }else{
        //ANIMATE VC EXITING TO THE RIGHT SIDE OF THE SCREEN
    }
}
@end

      - (void)viewWillDisappear:(BOOL)animated {
    if ([self.navigationController.viewControllers indexOfObject:self] == NSNotFound) {
        [self.navigationController popViewControllerRetro];
    }

    [super viewWillDisappear:animated];
}

      // NavigationController does not retain delegate, so you should hold it.
self.navigationController.delegate = self.navigationTransitioningDelegate;

      - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

      [[self window] setBackgroundColor:[UIColor whiteColor]];

      - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions (NSDictionary *)launchOptions {    
    [[self window] setBackgroundColor:[UIColor whiteColor]];

    // Override point for customization after application launch.
    return YES;
}