首先添加一个 UIView，甚至导航栏 [英] Add a UIView above all, even the navigation bar

问题描述

我想在任何其他视图(甚至导航栏)上方显示一种弹出"视图，如下所示:

I want to display, above any other views, even the navigation bar, a kind of "pop-up" view that looks like this:

• 带有 0.5 alpha 的全屏黑色背景，可以看到下面的其他 UIViewController.
• 中间有一个 UIView 窗口，其中包含一些信息(如果您想了解所有信息，可以使用日历).

• full screen black background with a 0.5 alpha to see the other UIViewController underneath.
• a UIView window in the middle with some information, (a calendar if you want to know everything).

为此，我创建了一个包含两个 UIViews(背景和窗口)的 UIViewController，并尝试显示它.我已经尝试了一个简单的 [mySuperVC addSubview:myPopUpVC.view]，但我仍然有上面的导航栏.

To do that, I've created a UIViewController that contains the two UIViews (background and window), and I'm trying to display it. I've tried a simple [mySuperVC addSubview:myPopUpVC.view], but I still have the navigation bar above.

我试图将它呈现为一个模态，但下面的 UIViewController 消失了，我失去了我的透明效果.

I've tried to present it as a modal, but the UIViewController underneath disappears, and I lose my transparency effect.

任何想法都可以做到这一点，我相信这很简单......

Any idea to do this, I'm sure it's quite simple...

谢谢！

推荐答案

您可以通过将视图直接添加到 keyWindow 来实现:

You can do that by adding your view directly to the keyWindow:

UIView *myView = /* <- Your custom view */;
UIWindow *currentWindow = [UIApplication sharedApplication].keyWindow;
[currentWindow addSubview:myView];

更新 -- 适用于 Swift 4.1 及更高版本

let currentWindow: UIWindow? = UIApplication.shared.keyWindow
currentWindow?.addSubview(myView)

iOS13 及以上更新

keyWindow 已弃用.您应该使用以下内容:

keyWindow is deprecated. You should use the following:

UIApplication.shared.windows.first(where: { $0.isKeyWindow })?.addSubview(myView)

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