使用id< protocol>在Interface Builder中的文件所有者？ [英] Using id<protocol> for file's owner in Interface Builder?

问题描述

我有一个自定义的 UITableViewCell 我使用 instantiateWithOwner：（id）所有者选项：（NSDictionary *）选项从nib实例化。实例化nib时，我将其保存到我的视图控制器中定义的IBOutlet，该控制器在.xib文件中设置为文件的所有者。一切都很好。

I have a custom UITableViewCell that I am instantiating from a nib using instantiateWithOwner:(id)owner options:(NSDictionary *)options. When the nib is instantiated, I am saving it to an IBOutlet defined in my view controller, which is set as the file's owner in the .xib file. Everything's been working great.

我现在遇到了在多个视图控制器中使用这个自定义单元的需要。我希望我可以定义一个协议（例如CustomCellOwner），多个视图控制器可以实现该协议。该协议将简单地定义用于在实例化时引用单元格的IBOutlet。

I've now come across the need to use this custom cell in multiple view controllers. I was hoping that I could define a protocol (e.g. CustomCellOwner), which multiple view controllers could implement. The protocol would simply define the IBOutlet used to reference the cell when instantiated.

理想情况下，我想将文件所有者设置为：

So ideally, I would like to set "file's owner" to:

id <CustomCellOwner>

。

但是， Interface Builder似乎只允许你将文件的所有者设置为已知类，而不是实现协议的id？

However, Interface Builder only seems to allow you to set file's owner to a known class, not to an id implementing a protocol?

有没有办法做到这一点？或者，更简单的方法来解决这个问题？

Is there any way to do this? Or, a simpler way to approach this problem?

谢谢！

推荐答案

这不是您要求的解决方案，但您可以创建一个 UIViewController 子类，为每个需要使用nib的视图控制器创建子类。类似于：

This isn't the solution you're asking for, but you could make a UIViewController subclass that you subclass for each view controller that needs to use your nib. Something like:

@interface CustomCellOwnerViewController : UIViewController
@property (nonatomic, strong) IBOutlet UIButton *someButton;
-(IBAction)doSomething;
@end

然后将其用作每个基类：

And then use that as the base class for each:

@interface FirstView : CustomCellOwnerViewController

然后您只需将文件所有者设置为 CustomCellOwnerViewController 即可。

Then you could simply set File's Owner to CustomCellOwnerViewController with no problems.

只是一个想法。

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