Control-drag in Xcode provides constraint options instead of IBOutlet options

Question

I've added a new IBOutlet that I want to connect in Interface Builder - however, all of a sudden, control-dragging from the class to the interface item provides me with a list of constraint options instead of a list of outlets/received actions.

This does not seem to affect all items, only some of them, but I've double-checked both the designated class of the cell view, as well as the @IBOutlet declaration in the source file, and everything seems to match up properly:

Answer 1

通过右键单击源项目（不拖动），然后连接列表中的各个出口，我能够解决此问题。