Add a UIView above all, even the navigation bar

Question

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

• full screen black background with a 0.5 alph

Answer 1

Note if you want add view in Full screen then only use below code

Add these extension of UIViewController

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
      }
   }
}

Continue as normal adding process of subview

Now use in adding UIViewController's viewDidAppear

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

     self.makeViewAsFullScreen()
}

Answer 2

@Nam's answer works great if you just want to display your custom view but if your custom view needs user interaction you need to disable interaction for the navigationBar.

self.navigationController.navigationBar.layer.zPosition = -1
self.navigationController.navigationBar.isUserInteractionEnabled = false

Like said in Nam's answer don't forget to reverse these changes:

self.navigationController.navigationBar.layer.zPosition = 0
self.navigationController.navigationBar.isUserInteractionEnabled = true

---

You can do this in a better way with an extension:

extension UINavigationBar {
    func toggle() {
        if self.layer.zPosition == -1 {
            self.layer.zPosition = 0
            self.isUserInteractionEnabled = true
        } else {
            self.layer.zPosition = -1
            self.isUserInteractionEnabled = false
        }
    }
}

And simply use it like this:

self.navigationController.navigationBar.toggle()

Answer 3

[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];

Answer 4

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];

UPDATE -- For Swift 4.1 and above

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

UPDATE for iOS13 and above

keyWindow is deprecated. You should use the following:

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

Answer 5

In Swift 4.2 and Xcode 10

var spinnerView: UIView? //This is your view

spinnerView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height))
//Based on your requirement change width and height like self.view.bounds.size.width
spinnerView?.backgroundColor = UIColor.black.withAlphaComponent(0.6)
//        self.view.addSubview(spinnerView)
let currentWindow: UIWindow? = UIApplication.shared.keyWindow
currentWindow?.addSubview(spinnerView!)

In Objective C

UIView *spinnerView;//This is your view

self.spinnerView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, UIScreen.mainScreen.bounds.size.width, UIScreen.mainScreen.bounds.size.height)];  
//Based on your requirement change width and height like self.view.bounds.size.width
self.spinnerView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.6];
// [self.view addSubview:self.spinnerView];
UIWindow *currentWindow = [UIApplication sharedApplication].keyWindow;
[currentWindow addSubview:self.spinnerView];

This can work either Portrait OR Landscape mode only.

One more simple code is:

yourViewName.layer.zPosition = 1//Change you view name

Answer 6

Dalef great solution in swift:

self.navigationController?.view.addSubview(view)