为什么隐藏我的状态栏会完全破坏我的简单动画？ [英] Why does hiding my status bar completely break my simple animation?

问题描述

示例项目： http://cl.ly/0O2t051o081p

我想实现一个滑出侧边栏，如这个问题，状态栏也会移动。我已经完成了所有工作并且侧边栏滑动，但是一旦我试图隐藏状态栏以完成幻觉，它就会阻止任何事情发生并且侧边栏不再滑出。

I want to achieve a slide-out sidebar as described in this question where the status bar moves as well. I've got everything working and the sidebar slides, but as soon as I try to hide the status bar with to complete the "illusion" it stops anything from happening at all and the sidebar no longer slides out.

这是我的代码：

- (void)viewDidAppear:(BOOL)animated {
    double delayInSeconds = 1.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [self.PostsView addSubview:[[UIScreen mainScreen] snapshotViewAfterScreenUpdates:NO]];

        hide = YES;
        [self setNeedsStatusBarAppearanceUpdate];

        [UIView animateWithDuration:1.0 animations:^{
            CGRect postsFrame = self.PostsView.frame;
            postsFrame.origin.x = self.MenuView.frame.size.width;

            self.PostsView.frame = postsFrame;
        }];
    });
}

我的代码基本上包含一个包含两个子视图控制器的包含视图控制器（主视图控制器和侧边栏视图控制器）内置在故事板中。

Where my code basically consists of a containing view controller that contains two child view controllers (the main view controller and the sidebar view controller) built in the Storyboard.

我还尝试设置查看基于控制器的状态栏外观在plist中 NO 并调用 [[UIApplication sharedApplication] setStatusBarHidden] 但确切同样的结果发生在它破裂的地方。

I've also tried setting View controller-based status bar appearance in the plist to NO and calling [[UIApplication sharedApplication] setStatusBarHidden] but the exact same result happens where it breaks.

我做错了什么？

推荐答案

我不确定为什么那条线会破坏你的动画，但是如果我按照你在上一段中所说的那样做了它，但在动画之前在视图中添加了layoutIfNeeded（我确实设置了基于View控制器的状态栏）在info.plist中显示为NO。。

I'm not sure why that line breaks you animation, but it worked properly if I did what you said in your last paragraph, but added a layoutIfNeeded to the view before the animation (I did set View controller-based status bar appearance to NO in the info.plist).

- (void)viewDidAppear:(BOOL)animated {
    double delayInSeconds = 1.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [self.PostsView addSubview:[[UIScreen mainScreen] snapshotViewAfterScreenUpdates:NO]];
        [[UIApplication sharedApplication] setStatusBarHidden:YES];
        [self.view layoutIfNeeded];
        hide = YES;
        [UIView animateWithDuration:1.0 animations:^{
            CGRect postsFrame = self.PostsView.frame;
            postsFrame.origin.x = self.MenuView.frame.size.width;

            self.PostsView.frame = postsFrame;
        }];
    });
}

此外，没有必要实施prefersStatusBarHidden。

Also it's unnecessary to implement prefersStatusBarHidden.

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