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iOS获取当前的ViewController

iOS获取当前的ViewController

作者: 清蘂翅膀的技术 | 来源:发表于2017-08-30 09:28 被阅读0次

    +(UIViewController *)getCurrentVC

    {

    UIViewController *result = nil;

    UIWindow * window = [[UIApplication sharedApplication] keyWindow];

    //app默认windowLevel是UIWindowLevelNormal,如果不是,找到UIWindowLevelNormal的

    if (window.windowLevel != UIWindowLevelNormal)

    {

    NSArray *windows = [[UIApplication sharedApplication] windows];

    for(UIWindow * tmpWin in windows)

    {

    if (tmpWin.windowLevel == UIWindowLevelNormal)

    {

    window = tmpWin;

    break;

    }

    }

    }

    id  nextResponder = nil;

    UIViewController *appRootVC=window.rootViewController;

    //    如果是present上来的appRootVC.presentedViewController 不为nil

    if (appRootVC.presentedViewController) {

    nextResponder = appRootVC.presentedViewController;

    }else{

    NSLog(@"===%@",[window subviews]);

    UIView *frontView = [[window subviews] objectAtIndex:0];

    nextResponder = [frontView nextResponder];

    }

    if ([nextResponder isKindOfClass:[UITabBarController class]]){

    UITabBarController * tabbar = (UITabBarController *)nextResponder;

    UINavigationController * nav = (UINavigationController *)tabbar.viewControllers[tabbar.selectedIndex];

    //        UINavigationController * nav = tabbar.selectedViewController ; 上下两种写法都行

    result=nav.childViewControllers.lastObject;

    }else if ([nextResponder isKindOfClass:[UINavigationController class]]){

    UIViewController * nav = (UIViewController *)nextResponder;

    result = nav.childViewControllers.lastObject;

    }else{

    result = nextResponder;

    }

    return result;

    }

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