NSAttributedString initWithHTML字符编码不正确？ [英] NSAttributedString initWithHTML incorrect character encoding?

问题描述

-[NSMutableAttributedString initWithHTML：documentAttributes：] 似乎会破坏特殊字符：

-[NSMutableAttributedString initWithHTML:documentAttributes:] seems to mangle special characters:

NSString *html = @""Hello" World"; // notice the smart quotes
NSData *htmlData = [html dataUsingEncoding:NSUTF8StringEncoding];
NSMutableAttributedString *as = [[NSMutableAttributedString alloc] initWithHTML:htmlData documentAttributes:nil];
NSLog(@"%@", as);

随后打印 Hello World 通过一些RTF命令。在我的应用程序中，我将属性字符串转换为RTF并将其显示在 NSTextView 中，但是那里的字符也损坏了。

That prints “Hello†World followed by some RTF commands. In my application, I convert the attributed string to RTF and display it in an NSTextView, but the characters are corrupted there, too.

根据文档，默认编码为UTF-8，但我尝试了明确的编码，结果是相同的：

According to the documentation, the default encoding is UTF-8, but I tried being explicit and the result is the same:

NSDictionary *attributes = @{NSCharacterEncodingDocumentAttribute: [NSNumber numberWithInt:NSUTF8StringEncoding]};
NSMutableAttributedString *as = [[NSMutableAttributedString alloc] initWithHTML:htmlData documentAttributes:&attributes];

推荐答案

使用 [html dataUsingEncoding：创建NSData并在将HTML解析为属性字符串时将匹配的编码选项设置为NSUnicodeStringEncoding] ：

<$ c的文档$ c> NSCharacterEncodingDocumentAttribute 有点令人困惑：

NSNumber，包含一个指定的int
文件的NSStringEncoding ；用于读写纯文本文件和编写HTML；纯文本的默认
是默认编码； HTML的默认值为
UTF-8。

NSNumber, containing an int specifying the NSStringEncoding for the file; for reading and writing plain text files and writing HTML; default for plain text is the default encoding; default for HTML is UTF-8.

因此，您的代码应为：

NSString *html = @""Hello" World";
NSData *htmlData = [html dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *options = @{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
                                    NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)};
NSMutableAttributedString *as =
    [[NSMutableAttributedString alloc] initWithHTML:htmlData
                                            options: options
                                 documentAttributes:nil];

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