如何将自定义NSFormatter设置为NSTextView? [英] How do I set a Custom NSFormatter to a NSTextView?

问题描述

我有一个NSTextView，我有一个自定义的NSFormatter，它限制了字符串的长度.但是我如何在NSTextView上"[_textView setFormatter:customFormatter]"?我找不到该怎么办.
示例代码将不胜感激！

I have a NSTextView and i have a custom NSFormatter that limits the string length. But how do i "[_textView setFormatter:customFormatter]" on a NSTextView? I can't find how to do that.
Example code would be appreciated!

推荐答案

无法将自定义NSFormatter与NSTextView一起使用. (这似乎是NSControl的省，其中NSTextField是其子类.)

It's not possible to use a custom NSFormatter with a NSTextView. (That appears to be the province of NSControl, of which NSTextField is a subclass.)

但是，可以为您的文本视图的文本存储(NSTextStorage)设置一个委托，并实现-textStorageWillProcessEditing:(一种NSTextStorageDelegate的方法)；在这里您可以限制用户的输入.您自定义的NSFormatter的现有代码可能会在此处进行修改.

However, it is possible to set up a delegate for your text view's text storage (NSTextStorage), and implement -textStorageWillProcessEditing: (a method of NSTextStorageDelegate) ; this is where you could constrain your user's input. Your existing code for your custom NSFormatter might be adapted for use there.

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