判断当前VC是不是正在展示的活跃页面:viewController.isViewLoaded && viewController.view.window
获取正在显示的viewController:
//获取Window当前显示的ViewController - (UIViewController*)currentViewController{ UIViewController* vc = [UIApplication sharedApplication].keyWindow.rootViewController; while (1) { if ([vc isKindOfClass:[UITabBarController class]]) { vc = ((UITabBarController*)vc).selectedViewController; } if ([vc isKindOfClass:[UINavigationController class]]) { vc = ((UINavigationController*)vc).visibleViewController; } if (vc.presentedViewController) { vc = vc.presentedViewController; }else{ break; } } return vc; }