xcode 无法 ctrl+drag 从第二个 ViewController 进入 ViewController.h
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Can't ctrl+drag into ViewController.h from second Viewcontroller
提问by Tom
I am building an iOS app for fun and here is where I run into trouble. I can insert an outlet and action in the ViewController.h files directly from my first View Controller through the ctrl+drag method; however, when I try ctrl+drag on the second ViewController it will not allow me.
我正在构建一个有趣的 iOS 应用程序，这就是我遇到麻烦的地方。我可以直接从我的第一个视图控制器通过 ctrl+drag 方法在 ViewController.h 文件中插入一个插座和动作；但是，当我在第二个 ViewController 上尝试 ctrl+drag 时，它不允许我。
Ctrl+drag on first ViewController
Ctrl+拖动第一个 ViewController
Ctrl+drag on second ViewController
Ctrl+拖动第二个 ViewController
回答by foundry
You have the wrong document open in the assistant editor. It should be ViewController.h, but you are displaying UIViewController.h.
您在助理编辑器中打开了错误的文档。它应该是 ViewController.h，但您显示的是 UIViewController.h。
Check you have correctly set your second view controller to your custom class ViewController using the Identity Inspector (third of the right hand utility panels) then make sure it's header file is the document you are displaying on the right.
检查您是否已使用 Identity Inspector（右侧实用程序面板的第三个）将第二个视图控制器正确设置为自定义类 ViewController，然后确保它的头文件是您在右侧显示的文档。
update
更新
From your comments, you are having difficulty setting the second view controller to a custom class.
根据您的评论，您很难将第二个视图控制器设置为自定义类。
Here is how you select it in the storyboard. Note that you are selecting the View Controller, not it's topmost View
这是您在故事板中选择它的方法。请注意，您选择的是View Controller，而不是最顶层的View
