How to get the active view in an iOS application from the app delegate?

Question

how can i get the currently active view (the main view currently being viewed by the user) from the app delegate for references sake?

Define "main view". There could be several `UIView` objects (and subclasses) on-screen at once. Which one would you expect to get? — Shaggy Frog, Sep 14 '10 at 00:54
Say the user is currently on a screen to perform a specific action, I want to get the viewcontroller for the container view for that screen — David, Sep 14 '10 at 01:39
You'll have to keep track of that yourself. Like views, there could be more than one view controller active on the screen. — Shaggy Frog, Sep 14 '10 at 03:08

score 34 · Answer 1 · answered May 31 '13 at 19:12

34

UIWindow *window = [[UIApplication sharedApplication] keyWindow];
UIView *topView = window.rootViewController.view;

answered May 31 '13 at 19:12

phatmann

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skywinder · Answer 2 · 2014-08-12T07:34:57.817

16

All top answers doesn't work with modal presented views! Use this code instead:

UIView * topView = [[[[UIApplication sharedApplication] keyWindow] subviews] lastObject];

edited Aug 12 '14 at 07:34

answered Aug 12 '14 at 07:26

skywinder

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score 9 · Answer 3 · answered Nov 02 '11 at 17:22

9

It depends on how your app is set up.

Typically, your app delegate will have a main view controller property that will let you get to it.

To get your app delegate

MyAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];

UIView *topView = appDelegate.viewController.view;

If your app has a navigation controller property in the app delegate you can do something like this.

UIView *topView = appDelegate.navigationController.topViewController.view;

answered Nov 02 '11 at 17:22

Randall

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The third line gives me an error: Property 'navigationController' not found on object of type 'kzAppDelegate' – zakdances May 11 '12 at 15:44
you probably aren't using a navigation controller then. Look at the second line of code in my answer. – Randall May 11 '12 at 23:59

score 1 · Answer 4 · edited Mar 26 '18 at 17:03

I found this and it works great for me for all types of segues and view controllers.

+(UIViewController*) getTopController{
    UIViewController *topViewController = [UIApplication sharedApplication].keyWindow.rootViewController;

    while (topViewController.presentedViewController) {
        topViewController = topViewController.presentedViewController;
    }

    return topViewController;
}

score 0 · Answer 5 · answered Jun 12 '12 at 08:53

0

you can use [appDelegate.navigationController.topViewController class] to log the class of the controller or get the title property to know which one it is.

answered Jun 12 '12 at 08:53

Farrukh Javeid

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score 0 · Answer 6 · answered May 28 '13 at 15:17

Hope this helps you

UINavigationController *navCnt = (UINavigationController *)self.window.rootViewController;

if([navCnt.topViewController isMemberOfClass:[WebViewController class]])
{
    return UIInterfaceOrientationMaskAll;
}
else
return UIInterfaceOrientationMaskPortrait;

score 0 · Answer 7 · answered Jan 22 '14 at 10:16

0

Anywhere in the app you can get your rootViewController View also like that:

id<UIApplicationDelegate> appDelegate = [[UIApplication sharedApplication] delegate];
UIView *rootView = appDelegate.window.rootViewController.view;

answered Jan 22 '14 at 10:16

Krzysztof Przygoda

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score 0 · Answer 8 · edited May 23 '17 at 10:30

0

Try Eric's answer:

+ (UIViewController*) topMostController
{
    UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;

    while (topController.presentedViewController) {
        topController = topController.presentedViewController;
    }

    return topController;
}

edited May 23 '17 at 10:30

Community

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answered Feb 02 '17 at 04:13

Hsm

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How to get the active view in an iOS application from the app delegate?

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