无法在 UIViewController 中为 UIBarButtonItem 创建 IBOutlet

问题描述

我正在尝试创建一个从 UIBarButtonItem 到 UIViewController 的 IBoutlet，但是当 ctrl+单击并拖动到控制器时，我看不到任何指示器，因此无法创建它.不知道我做错了什么.

I'm trying to create an IBoutlet from a UIBarButtonItem to a UIViewController, but when ctrl+clicking and dragging to the controller, I see no indicator whatsoever, and thus it's impossible to create it. Not sure what I'm doing wrong.

这是屏幕截图，以防万一:

Here's the screenshot, in case it could clear something up:

非常感谢！

我还尝试使用 @property (weak,nonatomic) IBOutlet UIBarButtonItem *barButtonItem; 手动创建 IBOutlet，然后按 ctrl+单击并拖动，但结果相同.

I also tried to create the IBOutlet manually with @property (weak,nonatomic) IBOutlet UIBarButtonItem *barButtonItem; and then ctrl+clicking and dragging, but same result.

推荐答案

我能够创建一个 UIBarButtonItem IBOutlet

I was able to create a UIBarButtonItem IBOutlet

@property (nonatomic, weak) IBOutlet UIBarButtonItem *cameraLibraryToggleButton;

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