iOS 获取当前屏幕显示的viewcontroller

//获取当前屏幕显示的viewcontroller

• (UIViewController *)getCurrentVC

{

UIViewController *rootViewController = [UIApplication sharedApplication].keyWindow.rootViewController;



UIViewController *currentVC = [self getCurrentVCFrom:rootViewController];



return currentVC;

}

• (UIViewController *)getCurrentVCFrom:(UIViewController *)rootVC

{

UIViewController *currentVC;



if ([rootVC presentedViewController]) {

    // 视图是被presented出来的

    

    rootVC = [rootVC presentedViewController];

}



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

    // 根视图为UITabBarController

    

    currentVC = [self getCurrentVCFrom:[(UITabBarController *)rootVC selectedViewController]];

    

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

    // 根视图为UINavigationController

    

    currentVC = [self getCurrentVCFrom:[(UINavigationController *)rootVC visibleViewController]];

    

} else {

    // 根视图为非导航类

    

    currentVC = rootVC;

}



return currentVC;

}