确定Unicode字符是否可见？ [英] Determining if a Unicode character is visible?

问题描述

我写一个文本编辑器，它有一个选项来显示一个项目符号，代替任何不可见的Unicode字符。不幸的是，似乎没有简单的方法来确定Unicode字符是否是不可见的。

I am writing a text editor which has an option to display a bullet in place of any invisible Unicode character. Unfortunately there appears to be no easy way to determine whether a Unicode character is invisible.

我需要找到一个包含每个Unicode字符的文本文件，对于不可见字符。

I need to find a text file containing every Unicode character in order that I can look through for invisible characters. Would anyone know where I can find such a file?

编辑：我在Cocoa for Mac OS X中编写这个应用程序。

I am writing this app in Cocoa for Mac OS X.

推荐答案

哦，我看到...实际的隐藏字符;）这个FAQ可能是有用的：

Oh, I see... actual invisble characters ;) This FAQ will probably be useful:

a href =http://www.unicode.org/faq/unsup_char.html =nofollow noreferrer> http://www.unicode.org/faq/unsup_char.html

http://www.unicode.org/faq/unsup_char.html

它列出了当前不可见的编码点，并有其他可能有帮助的信息。

It lists the current invisible codepoints and has other information that you might find helpful.

编辑：特定信息

由于您使用的是Cocoa，您可以获取控制字符的unicode字符集，并进行比较：

Since you're using Cocoa, you can get the unicode character set for control characters and compare against that:

NSCharacterSet* controlChars = [NSCharacterSet controlCharacterSet];

您可能还想看看我在上面发布的FAQ链接，认为您可能需要根据控制字符集返回的字符集的信息。

You might also want to take a look at the FAQ link I posted above and add any characters that you think you may need based on the information there to the character set returned by controlCharacterSet.

编辑：添加了一个从Unicode字符创建Unicode字符串的示例

unichar theChar = 0x000D;
NSString* thestring = [NSStirng stringWithCharacters:&theChar length:1];

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