从iPhone X iOS 12的底部边缘向上滑动时，停止应用程序进入后台 [英] Stop app going to background when swiping up from bottom edge on iPhone X iOS 12

问题描述

在iPhone X iOS 12上从屏幕底部边缘滑动时，我的游戏进入了背景模式.

My game is going into background mode when performing a swipe from the bottom edge of the screen on iPhone X iOS 12.

按照 Apple文档覆盖并调用setNeedsUpdateOfScreenEdgesDeferringSystemGestures应该会阻止应用程序进入后台，但这在iOS 12上不起作用.

As per Apple documentation overriding preferredScreenEdgesDeferringSystemGestures and calling setNeedsUpdateOfScreenEdgesDeferringSystemGestures should stop the app from going to background but this is's not working on iOS 12.

我正在使用Unity3D，并且编辑器具有在边缘上延迟系统手势选项(根据apple文档实现)，但也无法正常工作.

I am using Unity3D and the editor has the Defer system gestures on edges option , which is implemented as per apple documentation, but also does not work.

我正在Xcode 10中编译项目.

I am compiling the project in Xcode 10.

还有其他人有这个问题吗，您有解决办法吗?

Does anyone else have this problem and do you have a fix?

PS:我正在一个空的单视图iOS项目中对此进行测试，唯一添加的代码如下:

PS: I am testing this in an empty single view iOS project, the only added code is the following:

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear: animated];

    [self setNeedsUpdateOfHomeIndicatorAutoHidden];
    [self setNeedsUpdateOfScreenEdgesDeferringSystemGestures];
}

- (UIRectEdge)preferredScreenEdgesDeferringSystemGestures
{
    return UIRectEdgeAll;
}

- (BOOL)prefersHomeIndicatorAutoHidden
{
    return YES;
}

更新:事实证明，如果我使用快速实现，它会起作用.太糟糕了，我无法为Unity3D 2017生成的项目执行此操作.

Update: Turns out that if I use a swift implementation it works. Too bad I cannot do this for the Unity3D 2017 generated project.

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    if #available(iOS 11.0, *){
        setNeedsUpdateOfScreenEdgesDeferringSystemGestures()
    }
}

override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge{
    return [.all];
}
}

推荐答案

删除prefersHomeIndicatorAutoHidden使其也可以在Objective C中使用.

Removing prefersHomeIndicatorAutoHidden makes it work in Objective C also.

这是可行的示例实现，适用于遇到相同问题的任何人:

This is the working example implementation, for anyone having the same problem:

- (void)viewDidLoad {
    [super viewDidLoad];

    if (@available(iOS 11.0, *)) { 
      [self setNeedsUpdateOfScreenEdgesDeferringSystemGestures];
    }
 }

- (UIRectEdge)preferredScreenEdgesDeferringSystemGestures
{
    return UIRectEdgeAll;
}

对于像我一样使用Unity3d的用户，只需从生成的Xcode项目中的UnityViewControllerBase + iOS.mm中删除以下方法即可:

And for those who, like me, are using Unity3d just delete the following method from UnityViewControllerBase+iOS.mm in the generated Xcode project:

- (BOOL)prefersHomeIndicatorAutoHidden
{
    return YES;
}

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