获取当前显示的viewController

//获取当前的UIViewController 

+ (NSString *)getViewController

{

    UIViewController *resultVC = [selftopViewController:[[UIApplicationsharedApplication].keyWindowrootViewController]];

    while (resultVC.presentedViewController) {

        resultVC = [selftopViewController:resultVC.presentedViewController];

    }

    NSLog(@"当前viewController===========%@",resultVC);

    returnresultVC;

}

+ (UIViewController *)topViewController:(UIViewController *)vc {

    if ([vc isKindOfClass:[UINavigationController class]]) {

        return [self topViewController:[(UINavigationController *)vc topViewController]];

    } elseif ([vc isKindOfClass:[UITabBarController class]]) {

        return [selftopViewController:[(UITabBarController *)vc selectedViewController]];

    } else {

        return vc;

    }

    returnnil;

}

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