我想在任何其他视图，甚至是导航栏上，显示一种“弹出”视图，看起来像这样:
全屏黑色背景，0.5 alpha，可以看到下面的另一个UIViewController。 中间有一个带有一些信息的UIView窗口，(如果你想知道一切，一个日历)。
为了做到这一点，我已经创建了一个UIViewController，它包含了两个uiview (background和window)，我试图显示它。我尝试了一个简单的[mySuperVC addSubview:myPopUpVC。视图]，但我仍然有上面的导航栏。
我试着把它表示为一个模态，但是下面的UIViewController消失了，我失去了透明效果。
有什么办法可以做到这一点吗，我相信这很简单……
谢谢!
当前回答
You need to add a subview to the first window with the UITextEffectsWindow type. To the first, because custom keyboards add their UITextEffectsWindow, and if you add a subview to it this won't work correctly. Also, you cannot add a subview to the last window because the keyboard, for example, is also a window and you can`t present from the keyboard window. So the best solution I found is to add subview (or even push view controller) to the first window with UITextEffectsWindow type, this window covers accessory view, navbar - everything.
let myView = MyView()
myView.frame = UIScreen.main.bounds
guard let textEffectsWindow = NSClassFromString("UITextEffectsWindow") else { return }
let window = UIApplication.shared.windows.first { window in
window.isKind(of: textEffectsWindow)
}
window?.rootViewController?.view.addSubview(myView)
其他回答
UIApplication.shared.keyWindow?.insertSubview(yourView, at: 1)
这个方法适用于xcode 9.4, iOS 11.4
[self.navigationController。视图addSubview overlayView):;是你真正想要的吗
[self.navigationController.navigationBar.layer setZPosition:-0.1];
UIView *view = [[UIView alloc]initWithFrame:CGRectMake(10, 20, 35, 35)];
[view setBackgroundColor:[UIColor redColor]];
[self.navigationController.view addSubview:view];
[self.navigationController.view bringSubviewToFront:view];
self.navigationController.view.clipsToBounds = NO;
[self.navigationController.navigationBar.layer setZPosition:0.0];
注意，如果你想在全屏中添加视图，那么只能使用下面的代码
添加这些UIViewController的扩展
public extension UIViewController {
internal func makeViewAsFullScreen() {
var viewFrame:CGRect = self.view.frame
if viewFrame.origin.y > 0 || viewFrame.origin.x > 0 {
self.view.frame = UIScreen.main.bounds
}
}
}
继续正常的子视图添加过程
现在用于添加UIViewController的viewDidAppear
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.makeViewAsFullScreen()
}
将您的视图添加为NavigationController的子视图。
[self.navigationController.navigationBar addSubview: overlayView)]
你也可以把它加在窗户上:
UIView *view = /* Your custom view */;
UIWindow *window = [UIApplication sharedApplication].keyWindow;
[window addSubview:view];
希望这能有所帮助。：）
