xcode 无法设置参考出口
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Unable to Set Referencing Outlet
提问by vfvfvfvfvfvfvfvfv
I am unable to set a referencing outlet for a text field I have created. I am trying to do this via Ctrl-Drag. Can anyone advise? I have set the delegate as the View Controller. In general, I only have one view which is populated with a few text fields and I have written the following code for the ViewController.h which is what I'm trying to set up as a Referencing Outlet:
我无法为我创建的文本字段设置引用出口。我正在尝试通过 Ctrl-Drag 执行此操作。任何人都可以建议吗？我已将委托设置为视图控制器。通常，我只有一个视图，其中填充了几个文本字段，并且我为 ViewController.h 编写了以下代码，这是我尝试将其设置为引用插座的内容：
@property (weak, nonatomic) IBOutlet UITextField *userIDText;
回答by nhgrif
First, make sure the control you're dragging from is the same class as the outlet (in this case, UITextField) or it could be a subclass of that class.
首先，确保您从中拖动的控件与插座属于同一类（在本例中为UITextField），或者它可能是该类的子类。
Second, make sure control's parent view is a subclass of the file you're dragging to.
其次，确保控件的父视图是您要拖动到的文件的子类。
Third, make sure the file you're dragging to is saved. This is the most common problem I run into. Go to the source file you're dragging to and push Cmd+S to save.
第三，确保您要拖动到的文件已保存。这是我遇到的最常见的问题。转到您要拖动到的源文件，然后按 Cmd+S 进行保存。
Fourth, when in doubt, Cmd+Shift+K to clean, Cmd+B to build, then try again. If that still doesn't work, restart Xcode. And if it's still not working, go back through the checklist.
四、当有疑问时，Cmd+Shift+K 进行清理，Cmd+B 进行构建，然后再试一次。如果这仍然不起作用，请重新启动 Xcode。如果它仍然不起作用，请返回检查清单。
回答by oabarca
In my case, to be able to create a referencing outlet,
就我而言，为了能够创建一个引用出口，
- I had to open the Storyboard.
- Click on the top View Controller element (left panel in the Storyboard)
- In the Identity Inspector (right panel), I had to select from the list my custom view controller class before I could drag and create the referencing outlet in it.
- 我不得不打开故事板。
- 单击顶部的视图控制器元素（故事板中的左侧面板）
- 在 Identity Inspector（右面板）中，我必须从列表中选择我的自定义视图控制器类，然后才能在其中拖动和创建引用出口。
回答by Hideyasu.T
In my cace,(swift3) 1.right click on the storyboard. 2.Ctrl-Drag from black window and ReferencingOutlet to View on the storyboard. enter image description here
在我的情况下，(swift3) 1.右键单击故事板。2.Ctrl-从黑色窗口和ReferencingOutlet 拖动到情节提要上的查看。 在此处输入图片说明
