无法更改 splitviewcontroller 中的视图

发布于 2024-10-13 05:27:33 字数 694 浏览 7 评论 0原文

我试图通过单击模态视图中的按钮（一个人正在选择一个选项）来更改 splitview 控制器中的视图。我使用通知来完成此操作：

当在模式视图中单击按钮时，它会发出通知，然后自行关闭（解除）：
[[NSNotificationCenter defaultCenter] postNotificationName:@"launchProject" object:nil];
分割视图控制器内的 DetailViewController 正在侦听此通知，并切换 SVC 中的视图

-(void)launchProject:(NSNotification *)notification {
    Project* secondDetail2 = [[Project alloc] initWithNibName:nil bundle:nil];
    ProjectRootController* secondRoot2 = [[ProjectRootController alloc] initWithNibName:nil bundle:nil ]; 
    self.splitViewController.viewControllers =[NSArray arrayWithObjects: secondRoot2, secondDetail2 , nil];

}

I不明白为什么视图没有切换。欢迎对此提出任何建议。

原文

I am trying to change the views in a splitview controller based upon clicking a button in a modalview (a person is selecting an option). I am using notifications to accomplish this:

When the button is clicked in the modal view, it issues a notice, then closes (dismisses) itself:
[[NSNotificationCenter defaultCenter] postNotificationName:@"launchProject" object:nil];
The DetailViewController inside the split view controller is listening for this notification, and switches out the views in the SVC

-(void)launchProject:(NSNotification *)notification {
    Project* secondDetail2 = [[Project alloc] initWithNibName:nil bundle:nil];
    ProjectRootController* secondRoot2 = [[ProjectRootController alloc] initWithNibName:nil bundle:nil ]; 
    self.splitViewController.viewControllers =[NSArray arrayWithObjects: secondRoot2, secondDetail2 , nil];

}

I don't understand why the views aren't switching out. Any advice on this will be welcome.

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往日 2024-10-20 05:27:33

您没有显示所有代码，所以我猜测问题是对通知工作方式的误解。最初可能会令人困惑，但它非常简单。到目前为止，您已经有了：

[[NSNotificationCenter defaultCenter] postNotificationName:@"launchProject" object:nil]

，这很好。

但您还需要在

[[NSNotificationCenter defaultCenter]
 addObserver:self 
 selector:@selector(launchProject:) // selector should be your function name, launchProject
 name:@"launchProject" // notification name - must be same as what is given to postNotificatioName.
 object: nil];

某个地方，例如 init 函数中。

换句话说，postNotificationName:@"launchProject" 不会调用您的函数 launchProject。它将名为“launchProject”的通知放入 NSNotificationCenter defaultCenter 中。如果您不寻找该特定通知，那么什么都不会发生。

希望有帮助..

You haven't shown all the code, so I'm guessing the problem is a misunderstanding of how notifications work. It can be initially confusing, but it's very straightforward. So far, you have:

[[NSNotificationCenter defaultCenter] postNotificationName:@"launchProject" object:nil]

which is fine.

But you also need to have

[[NSNotificationCenter defaultCenter]
 addObserver:self 
 selector:@selector(launchProject:) // selector should be your function name, launchProject
 name:@"launchProject" // notification name - must be same as what is given to postNotificatioName.
 object: nil];

somewhere, like in an init function.

In other words, postNotificationName:@"launchProject" does NOT call your function launchProject. It puts a notification with the name "launchProject" into the NSNotificationCenter defaultCenter. If you're not looking for that particular notification, then nothing will happen.

Hope that helps..

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