Swift HTML解码问题

问题描述

在Swift中，我使用 NSAttributedString 解码HTML，见下：

 <$ c $ 
让encodedData = encodedString.dataUsingEncoding（NSUTF8StringEncoding）
 let attributedOptions = [NSDocumentTypeDocumentAttribute：NSHTMLTextDocumentType] 
 let attributedString =我的编码 = NSAttributedString（data：encodedData，options：attributedOptions，documentAttributes：nil，error：nil）
 let decodeString = attributedString.string 
 println（decodedString）
  pre> 
 
 
但是结果如下：
 
 
真正的结果必须与 encodedString  
 
 
 
相同。这种方法有什么问题？
解决方案您必须在文档选项中指定使用的字符编码： 
 
 
  let encodedString =Phảicôngnhậnrằng 
 let encodedData = encodedString.dataUsingEncoding（NSUTF8StringEncoding）！
 let encodedData = encodedString.dataUsingEncoding（NSUTF8StringEncoding）！ 
 let attributedOptions：[String：AnyObject] = [
 NSDocumentTypeDocumentAttribute：NSHTMLTextDocumentType，
 NSCharacterEncodingDocumentAttribute：NSUTF8StringEncoding] //<  -  ADDED 
 let attributedString = NSAttributedString（data：encodedData，options ：属性选项，documentAttributes：无，错误：无）！ 
 let decodedString = attributedString.string 
 println（decodedString）
 //输出：输出：PhảicôngnhậnrằngkểtừlúcôngThănglàmbộtrưởng
  
请注意，我必须插入两个unwrap操作符！才能使用Xcode 6.1.1进行编译。 
您可能希望使用可选绑定来检查结果。
 
 
 
 （针对Swift 1.2进行了更新） 
 
In Swift, I Decoding HTML using NSAttributedString, see below:
let encodedString = "Phải công nhận rằng kể từ lúc ông Thăng làm bộ trưởng"
let encodedData = encodedString.dataUsingEncoding(NSUTF8StringEncoding)
let attributedOptions = [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType]
let attributedString = NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil, error: nil)
let decodedString = attributedString.string
println(decodedString)
But the result like this:
The true result must be the same with the encodedString
What's wrong in this method?
 解决方案 
You have to specify the used character encoding in the document options:
let encodedString = "Phải công nhận rằng kể từ lúc ông Thăng làm bộ trưởng"
let encodedData = encodedString.dataUsingEncoding(NSUTF8StringEncoding)!
let attributedOptions : [String : AnyObject ] = [
    NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
    NSCharacterEncodingDocumentAttribute: NSUTF8StringEncoding ] // <- ADDED
let attributedString = NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil, error: nil)!
let decodedString = attributedString.string
println(decodedString)
// Output: Phải công nhận rằng kể từ lúc ông Thăng làm bộ trưởng
Note that I had to insert two unwrap operators ! to make it compile with Xcode 6.1.1.You might want to check the results with optional binding instead.
(Updated for Swift 1.2)
                        
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