How to get visible viewController from app delegate when using storyboard? How to get visible viewController from app delegate when using storyboard? ios ios

How to get visible viewController from app delegate when using storyboard?


This should do it for you:

- (void)applicationWillResignActive:(UIApplication *)application{    UIViewController *vc = [self visibleViewController:[UIApplication sharedApplication].keyWindow.rootViewController];}- (UIViewController *)visibleViewController:(UIViewController *)rootViewController{    if (rootViewController.presentedViewController == nil)    {        return rootViewController;    }    if ([rootViewController.presentedViewController isKindOfClass:[UINavigationController class]])    {        UINavigationController *navigationController = (UINavigationController *)rootViewController.presentedViewController;        UIViewController *lastViewController = [[navigationController viewControllers] lastObject];        return [self visibleViewController:lastViewController];    }    if ([rootViewController.presentedViewController isKindOfClass:[UITabBarController class]])    {        UITabBarController *tabBarController = (UITabBarController *)rootViewController.presentedViewController;        UIViewController *selectedViewController = tabBarController.selectedViewController;        return [self visibleViewController:selectedViewController];    }    UIViewController *presentedViewController = (UIViewController *)rootViewController.presentedViewController;    return [self visibleViewController:presentedViewController];}


@aviatorken89's answer worked well for me. I had to translate it to Swift - for anybody starting out with Swift:

Updated for Swift 3:

func getVisibleViewController(_ rootViewController: UIViewController?) -> UIViewController? {    var rootVC = rootViewController    if rootVC == nil {        rootVC = UIApplication.shared.keyWindow?.rootViewController    }    if rootVC?.presentedViewController == nil {        return rootVC    }    if let presented = rootVC?.presentedViewController {        if presented.isKind(of: UINavigationController.self) {            let navigationController = presented as! UINavigationController            return navigationController.viewControllers.last!        }        if presented.isKind(of: UITabBarController.self) {            let tabBarController = presented as! UITabBarController            return tabBarController.selectedViewController!        }        return getVisibleViewController(presented)    }    return nil}

Old answer:

func applicationWillResignActive(application: UIApplication) {    let currentViewController = getVisibleViewController(nil)}func getVisibleViewController(var rootViewController: UIViewController?) -> UIViewController? {    if rootViewController == nil {        rootViewController = UIApplication.sharedApplication().keyWindow?.rootViewController    }    if rootViewController?.presentedViewController == nil {        return rootViewController    }    if let presented = rootViewController?.presentedViewController {        if presented.isKindOfClass(UINavigationController) {            let navigationController = presented as! UINavigationController            return navigationController.viewControllers.last!        }        if presented.isKindOfClass(UITabBarController) {            let tabBarController = presented as! UITabBarController            return tabBarController.selectedViewController!        }        return getVisibleViewController(presented)    }    return nil}


We implemented it as an UIApplication extension:

import UIKitextension UIApplication {    var visibleViewController: UIViewController? {        guard let rootViewController = keyWindow?.rootViewController else {            return nil        }        return getVisibleViewController(rootViewController)    }    private func getVisibleViewController(_ rootViewController: UIViewController) -> UIViewController? {        if let presentedViewController = rootViewController.presentedViewController {            return getVisibleViewController(presentedViewController)        }        if let navigationController = rootViewController as? UINavigationController {            return navigationController.visibleViewController        }        if let tabBarController = rootViewController as? UITabBarController {            return tabBarController.selectedViewController        }        return rootViewController    }}


matomo