Swift HTML解码麻烦

发布时间：2020-12-14 05:42:55 所属栏目：百科来源：网络整理

导读：在Swift中,我使用NSAttributedString解码HTML,见下文： let encodedString = "Ph?i c?ng nh?n r?ng k? t? lúc ?ng Th?nglàm b? tr??ng"let encodedData = encodedString.dataUsingEncoding(NSUTF8StringEncoding)let attributedOptions = [NSDocumentTypeD

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

let encodedString = "Ph?i c?ng nh?n r?ng k? t? lúc ?ng Th?nglàm b? tr??ng"
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)

但结果是这样的：

Pháo￡i c?′ng nháo-n ráo±ng ká?? tá?? l?oc ?′ng Th??ng?l?m bá??
tr?°á??ng

真实结果必须与encodedString相同

这种方法有什么问题？

您必须在文档选项中指定使用的字符编码：

let encodedString = "Ph?i c?ng nh?n r?ng k? t? lúc ?ng Th?ng làm b? tr??ng"
let encodedData = encodedString.dataUsingEncoding(NSUTF8StringEncoding)!
let attributedOptions : [String : AnyObject ] = [
    NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute: NSUTF8StringEncoding ] // <- ADDED
let attributedString = NSAttributedString(data: encodedData,error: nil)!
let decodedString = attributedString.string
println(decodedString)
// Output: Ph?i c?ng nh?n r?ng k? t? lúc ?ng Th?ng làm b? tr??ng

请注意,我必须插入两个解包操作符！使用Xcode 6.1.1进行编译.
您可能希望使用可选绑定检查结果.

(针对Swift 1.2更新)

（编辑：李大同）

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