如何用`NSControl`和`NSActionCell`编写一个自定义控件 [英] How do I write a custom control with `NSControl` and `NSActionCell`

问题描述

我在这里寻找一个最小可行的例子。我已经googleing和阅读了几天，我找不到一个单一的资源是最新的。

我的NSControl工作正常，但一旦我添加

  +（Class）cellClass {
 return [MYCustomCell class]; 
} 
  

我得到这个输出，我的窗口停止绘制正确

 <错误> ;: kCGErrorFailure：CGSShapeWindow 
<错误> ;: kCGErrorFailure：设置断点@ CGErrorBreakpoint因为他们被记录。 
 _NXPlaceWindow：错误设置窗口形状（1000）
<错误> ;: kCGErrorFailure：CGSShapeWindow 
 _NSShapeRoundedWindowWithWeighting：错误设置窗口形状（1000）
  / pre> 
 
 
我已经阅读了我可以找到的关于这个主题（包括苹果文档）的一切，但一切似乎都模糊不清，来正确实现。 
解决方案
我相信我最终找到了答案。
 
 
 
 -cellSize方法必须在NSCell / NSActionCell子类中重写。堆栈跟踪后，我发现这个方法将返回（40000,40000）作为您的单元格大小，如果它没有被覆盖，从而创建我们已经看到的大小错误。因为我在NSActionCell子类中有特殊的需求，需要单元格来占据整个NSControl的绘图区域，所以我只是使用了以下内容。
  - （NSSize）cellSize {
 return self.controlView.bounds.size; 
} 
  
希望这有助于您的处境。
 
I'm looking for a minimal viable example here. I've been googleing and reading up for days now and I can't find a single resource that is up to date.

My NSControl works ok, but as soon as I add
+ (Class)cellClass {
    return [MYCustomCell class];
}
to it I get this output and my window stops to draw properly
<Error>: kCGErrorFailure: CGSShapeWindow
<Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
_NXPlaceWindow: error setting window shape (1000)
<Error>: kCGErrorFailure: CGSShapeWindow
_NSShapeRoundedWindowWithWeighting: error setting window shape (1000)
I've read everything I could find about this subject (including the Apple docs), but everything seems far to vague to come to a proper implementation. I would really appreciate it if somebody could point me in the right direction (proper code example or article).
解决方案
I believe I have finally found the answer.

The -cellSize method must be overridden in your NSCell/NSActionCell subclass. After gobs of stack tracing I discovered that this method will return (40000, 40000) as your cell size if it is not overridden thus creating the sizing errors that we have seen. Since I have special needs in my NSActionCell subclass that require the cell to occupy the entire NSControl's drawing area I simply used the following.
- (NSSize)cellSize {
    return self.controlView.bounds.size;
}
Hope this helps your situation.

                        
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