具有透明内容的ios 7视图与先前视图重叠

Question

最近我更新了我的xcode项目以使用iOS 7,但我遇到了一个大问题.因为我的整个应用程序只有一个背景图像(UIImageView添加到关键窗口)并且所有视图都是透明的,所以我在推UIViewController时遇到问题,因为推送的视图控制器与之前的视图重叠(你可以在这里看到它:http:/ /grab.by/qp0k).我可以预测这是因为在iOS 7中推送转换已经改变,因为现在它滑动了半个屏幕.也许有人知道如何解决这个问题？

这就是我设置关键窗口的方法

  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 
 UIImageView *background = [[UIImageView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
 background.image = [UIImage imageNamed:@"background.png"]; 
UINavigationController *navi = [[UINavigationController alloc]initWithRootViewController:self.viewController];
self.window.rootViewContro??ller = navi;
 [self.window makeKeyAndVisible];

之后当用户点击"开始锻炼"按钮时,我会一如既往地推送我的下一个视图:

workoutView *w = [[workoutView alloc]initWithNibName:@"workoutView" bundle:nil];
        [self.navigationController pushViewController:w animated:YES];

Answer 1

我这样做了

-(void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    [self.view setAlpha:0];
}

回来时不要忘记重新设置alpha.

- (void) viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [self.view setAlpha:1];
}

Answer 2

我通过实现新UINavigationControllerDelegate方法解决了这个问题animationControllerForOperation.

例如:

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

PushTransition* transition = [PushTransition new];
[transition setNavigationControllerOperation: operation];

return transition;
}

PushTransition是一个实现UIViewControllerAnimatedTransitioning协议的类,以及来自该协议的两个方法transitionDuration和animateTransition.另外,我添加了一个属性来传递操作(告诉我它是推送还是弹出过渡).

只需将用于移动视图的动画代码放入animateTransition,如下所示:

// the containerView is the superview during the animation process.
UIView *container = transitionContext.containerView;

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

UIView *fromView = fromVC.view;
UIView *toView = toVC.view;
CGFloat containerWidth = container.frame.size.width;

// Set the needed frames to animate.

CGRect toInitialFrame = [container frame];
CGRect fromDestinationFrame = fromView.frame;

if ([self navigationControllerOperation] == UINavigationControllerOperationPush)
{
    toInitialFrame.origin.x = containerWidth;
    toView.frame = toInitialFrame;
    fromDestinationFrame.origin.x = -containerWidth;
}
else if ([self navigationControllerOperation] == UINavigationControllerOperationPop)
{
    toInitialFrame.origin.x = -containerWidth;
    toView.frame = toInitialFrame;
    fromDestinationFrame.origin.x = containerWidth;
}

// Create a screenshot of the toView.
UIView *move = [toView snapshotViewAfterScreenUpdates:YES];
move.frame = toView.frame;
[container addSubview:move];

[UIView animateWithDuration:TRANSITION_DURATION delay:0
     usingSpringWithDamping:1000 initialSpringVelocity:1
                    options:0 animations:^{
                        move.frame = container.frame;
                        fromView.frame = fromDestinationFrame;
                    }
                 completion:^(BOOL finished) {
                     if (![[container subviews] containsObject:toView])
                     {
                         [container addSubview:toView];
                     }

                     toView.frame = container.frame;
                     [fromView removeFromSuperview];
                     [move removeFromSuperview];
                     [transitionContext completeTransition: YES];
                 }];

描述它,你可以完成.此外,您可以制作任何您喜欢的推送或流行动画.

Answer 3

我在初始化视图时通过执行此操作来修复它:

self.view.clipsToBounds = YES;