在NSTextView中替换NSTextStorage的正确方法？ [英] Proper way to replace NSTextStorage in NSTextView?
问题描述
我正在制作一些文本查看器应用程序。当前，我需要非常频繁且精确的行处理能力，因此我想将 NSTextStorage 类作为子类。但是我找不到任何方法来将新的文本存储设置为 NSTextView 。我能找到的唯一方法是
I am making some text viewer app. Currently I need very frequent and precise line handling ability, so I want to subclass NSTextStorage class. But I couldn't find any method to set a new text storage to NSTextView. The only method I could find was
-[NSLayoutManager replaceTextStorage:]
方法。但这是否就是我想要的。因为似乎只是替换链接的NSLayoutManager的文本存储而不是NSTextView。
method. But it's confusing whether this is what I was looking for. Because it seems just replace text storage of linked NSLayoutManagers instead of NSTextView.
我还考虑了NSTextView的子类化并覆盖了 -textStorage 方法，但是如果该类不是为子类设计的，它将产生不确定的结果。
I also considered subclassing NSTextView and overriding -textStorage method, but if the class is not designed for subclassing, it will make undefined result.
有人尝试过在NSTextView上使用自定义NSTextStorage吗？我怎样才能做到这一点？还是这是设计所禁止的？
Anyone has tried to use custom NSTextStorage on NSTextView? How can I do this? Or is this prohibited by design?
推荐答案
您可以执行以下操作来更改NSTextView的存储：
You can do something like this to change the storage for an NSTextView:
NSTextStorage *newStorage = [[NSTextStorage alloc] initWithString: @"test"];
[aTextView.layoutManager replaceTextStorage: newStorage];
由于NSTextStorage是NSMutableAttributedString的子类，因此可以使用所有相同的方法对其进行操作。
Since NSTextStorage is a subclass of NSMutableAttributedString you can manipulate it with all of the same methods.
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