swift属性的未知类型名称 [英] Unknown type name for swift property

问题描述

我有一个用Swift编写的CustomViewController类和一个用Objective C编写的CustomNavigationController类。我正在尝试将CustomNavigationController作为属性添加到我的CustomViewController中。我已将 #importCustomNavigationController.h添加到我的桥接标题中。

I have a CustomViewController class written in swift and a CustomNavigationController class written in Objective C. I'm trying to add my CustomNavigationController as a property to my CustomViewController. I've added #import "CustomNavigationController.h" to my bridging header.

在我的CustomViewController中我有：

In my CustomViewController I have:

class CustomViewController: UIViewController {

    var navController: CustomNavigationController?
...
//init methods


...


 override func viewDidLoad() {
        super.viewDidLoad()

        //Set up Navigation Controller
        navController = self.storyboard.instantiateViewControllerWithIdentifier("CustomNavigationController") as CustomNavigationController!
}

在我尝试构建和运行之前没有错误...我得到了未知类型名称'CustomNavigationController';你的意思是'UINavigationController'？

There are no errors until I try to build and run...I get "unknown type name 'CustomNavigationController'; did you mean 'UINavigationController'?"

有谁知道为什么它不能识别这种类型？

Does anyone know why it doesn't recognize the type?

推荐答案

在Objective-C代码中，您可以导入自动生成的 -Swift.h 标题。在相同的代码中，之前 #import 行，插入 #importCustomNavigationController.h。这两个 #import 语句的顺序至关重要！

In your Objective-C code, you are somewhere importing the automatically generated -Swift.h header. In that same code, before that #import line, insert #import "CustomNavigationController.h". The order of these two #import statements is crucial!

这将解决问题，确保CustomNavigationController是在自动生成 -Swift.h 标题之前的命名空间中，后者会知道前者并且一切都会好的。

This will solve the problem by making sure that CustomNavigationController is in the namespace before the automatically generated -Swift.h header, and so the latter will know about the former and all will be well.

如果Objective-C类不需要了解CustomNavigationController，这是一件令人讨厌的事情，但它解决了前面的问题，并允许你继续使用你的混合项目。

This is something of an annoyance if that Objective-C class had no need to know about CustomNavigationController, but it solves the problem going forward and allows you to continue to work with your hybrid project.

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