几个UINavigation控制器(每个选项卡一个)，作为我的应用程序委托的插座吗? [英] Several UINavigation controllers, one for each tab, as an outlets from my app delegate?

问题描述

这更多是关于一个问题和我的实现的讨论，这似乎是引起问题的原因.

This is more of a discussion on an issue and my implementation, which seems to be causing issues.

我的应用程序具有一个标签栏和导航控制器.在每个选项卡中，您都可以进入视图，并且选项卡栏将被隐藏，直到您从子视图中单击回来为止.

My app has a tab bar and navigation controllers. Within each tab you can go into views, and the tab bar will be hidden until you click back from your sub view.

我的每个选项卡上都有一个导航控制器，它们在我的应用程序委托中声明为插座，并且还具有 @class tab1navcontroller

I have a navigation controller for each on my tabs, these are declared as outlets in my app delegate and also have @class tab1navcontroller

典型的用途是

MyAppDelegate *delegate = (MyAppDelegate *)[[UIApplication sharedApplication] 
       delegate];
[delegate.tab1NavController pushViewController:nextController animated:YES];

过去我对此并没有很多问题，我相信我是从当时正在阅读的书中复制这种方法的.

I haven't had many problems with this in the past and I believe I copied the approach from a book I was reading at the time.

但是，几个月前，我与一位同事进行了讨论，他说我的应用程序应该只有一个导航控制器.

However, I had a discussion with a colleuge some months ago who said I should only have one navigation controller for my app.

当时我确实尝试替换了代码(如上所示)并使用了 self.navigationcontroller ，但这引起了问题，我不记得它们是什么，但是我放弃了这些修复程序

At the time I did try and replace the code (shown above) and use self.navigationcontroller instead, but this caused problems, I can't remember what they were, but I discarded those fixes.

今天，当按下视图并快速向后轻按时，发生了一个错误.我还使用僵尸事件探查器运行了该应用程序，这表明上面的代码是问题所在.

Today an error has occurred, when the view is pushed and back tapped quickly. I also ran the app with the zombie profiler and this indicated the code above was the problem.

我相信上面的代码可能会导致泄漏.

I believe the code above could be causing leaks.

我只是不知道哪种方法最好，从这里去哪里?

I just don't know what approach is best and where to go from here ?

推荐答案

正如@Dima在评论中所说，您的同事是错误的.在我的应用程序中，我有一个tabbarController作为窗口rootViewController.您可以在属性或其viewController数组或单个导航控制器中公开它.您不能在多个选项卡中重复使用导航控制器-每个选项卡一个或混合使用.也就是说，在我的tabbarController中，我有4个naviationControllers和一个普通的UIViewController子类.

As @Dima said in the comment, your colleague was wrong. In my app I have one tabbarController as the window rootViewController. You can either expose it in a property or its viewController array or the individual navigation controllers. You CANNOT reuse a navigation controller in multiple tabs - its one for each, or a mix. That is, in my tabbarController, I have 4 naviationControllers and one plain UIViewController subclass.

标签栏控制器保留其所有viewController，而NavigationControllers保留其所有viewController.就是说，如果您对弹出的viewController具有分配"类型引用，就会遇到问题.

The tab bar controller retains the all its viewControllers, and the navigationControllers retain all their viewControllers. That said, you get into problems if you have a 'assign' type reference to a viewController that gets popped.

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