无法在applicationWillResignActive中获取当前ViewController

问题描述

我有一个基于故事板的Single View应用程序;

I have a storyboard based Single View App;

我有3个 ViewControllers ViewController 代码中的类;

I have 3 ViewControllers on my Storyboard linked to 3 ViewController classes in the code;

我在 ViewControllers之间浏览通过这样做：

UIStoryboard*  sb = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle:[NSBundle mainBundle]];
MenuViewController* mainMenu = [sb instantiateViewControllerWithIdentifier:@"vcMainMenu"];

mainMenu.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:mainMenu animated:YES];

现在我需要访问不同的 UIcontrols 来自当前活动 ViewController 的 applicationWillResignActive ，我将根据 ViewController ，我试图这样做：

Now I need to access different UIcontrols on the applicationWillResignActive from the current active ViewController, I will access different controls depending of the ViewController, I'm trying to accomplish this by doing:

if ([self.window.rootViewController isKindOfClass:[LowProfileViewController class]])
{
    NSLog(@"here!");
}

但它总是返回 rootViewController 。如何获取当前显示 rootViewController 从 applicationWillResignActive ？

But it always returns the rootViewController. How Can I get the current displayed rootViewController from applicationWillResignActive?

请，并入 NavigationController 不是一个选项...

Please, Incorporate NavigationController is not an option...

感谢

推荐答案

您可以试试这个 -

You could try this -

1. code> AppDelegate @property （即 currentModelViewController ）

@property (nonatomic, retain) UIViewController *currentModelViewController;

对于每个 ViewController viewDidAppear 或在 viewWillAppear

appDelegate = [[UIApplication sharedApplication] delegate];
appDelegate.currentModelViewController = self;

b
$ b

Now this will work

if ([self.currentModelViewController isKindOfClass:[LowProfileViewController class]])
{
    NSLog(@"here!");
}

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