如何做一个NSOutlineView其中一些entires是按钮？ [英] How can I make an NSOutlineView where some of the entires are buttons?

问题描述

我想创建一个NSOutlineView子类，其中一些条目看起来像按钮。它看起来像这样：

I want to create an NSOutlineView subclass where some of the entries look like buttons. It would look something like this:

+ Fruits
  + Organic
    - Apples
    - Bananas
    [Add Item]
  + Non-organic
    - Cherries
    [Add Item]
  [Add Item]
+ Vegetables
  - Carrots
  [Add Item]

所有[Add Item]都是按钮。

Where all of the "[Add Item]"'s are buttons.

我有一种感觉，这涉及到使用outlineView：willDisplayCell：forTableColumn：item：delegate方法？

I have a feeling this involves using the outlineView:willDisplayCell:forTableColumn:item: delegate method somehow?

推荐答案

您将需要在大纲视图的委托中实现 outlineView：dataCellForTableColumn：item：方法，以便为需要按钮的行返回一个NSButtonCell，用于其他行的NSTextFieldCell。注意这个委托方法是在10.5中添加的，如果你需要支持10.4或更早版本，那么你需要一个自定义的NSTableColumn子类来覆盖 dataCellForRow：方法。

You'll want to implement the outlineView:dataCellForTableColumn:item: method in your outline view's delegate to return an NSButtonCell for the rows where you want a button, and an NSTextFieldCell for the other rows. Note that this delegate method was added in 10.5, if you need to support 10.4 or earlier, then you'll need to have a custom NSTableColumn subclass that overrides the dataCellForRow: method.

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