Json 如何在Swift中解码HTML实体？_Json_Swift_Html Entities

Json 如何在Swift中解码HTML实体？

json swift

Json 如何在Swift中解码HTML实体？,json,swift,html-entities,Json,Swift,Html Entities,我正在从一个站点提取一个JSON文件，收到的字符串之一是：周末&8216；秋天的国王’；[视频首映式]|@TheWeeknd |#SoPhi 如何将‘之类的内容转换为正确的字符我制作了一个Xcode游乐场来演示它： import UIKit var error: NSError? let blogUrl: NSURL = NSURL.URLWithString("http://sophisticatedignorance.net/api/get_recent_summ

我正在从一个站点提取一个JSON文件，收到的字符串之一是：

周末&8216；秋天的国王’；[视频首映式]|@TheWeeknd |#SoPhi

如何将

‘

之类的内容转换为正确的字符

我制作了一个Xcode游乐场来演示它：

import UIKit

var error: NSError?
let blogUrl: NSURL = NSURL.URLWithString("http://sophisticatedignorance.net/api/get_recent_summary/")
let jsonData = NSData(contentsOfURL: blogUrl)

let dataDictionary = NSJSONSerialization.JSONObjectWithData(jsonData, options: nil, error: &error) as NSDictionary

var a = dataDictionary["posts"] as NSArray

println(a[0]["title"])

该答案最近一次针对Swift 5.2和iOS 13.4 SDK进行了修订

没有简单的方法可以做到这一点，但您可以使用

NSAttributedString

magic使这个过程尽可能轻松（请注意，此方法也会剥离所有HTML标记）

请记住仅从主线程初始化

NSAttributedString

。它使用WebKit来解析下面的HTML，从而满足需求

//这是您的[0][“title”]
让encodedString=“周末&8216；秋天之王&8217；”
guard let data=htmlEncodedString.data（使用：.utf8）else{
返回
}
let选项：[NSAttributedString.DocumentReadingOptionKey:Any]=[
.documentType:nsAttributeString.documentType.html，
.characterEncoding:String.Encoding.utf8.rawValue
]
guard let attributedString=try？NSAttribute字符串（数据：数据，选项：选项，文档属性：nil）其他{
返回
}
//本周的“秋天之王”
让decodedString=attributedString.string

扩展字符串{
init？（htmlEncodedString:String）{
guard let data=htmlEncodedString.data（使用：.utf8）else{
归零
}
let选项：[NSAttributedString.DocumentReadingOptionKey:Any]=[
.documentType:nsAttributeString.documentType.html，
.characterEncoding:String.Encoding.utf8.rawValue
]
guard let attributedString=try？NSAttributedString（数据：数据，选项：选项，文档属性：nil）else{
归零
}
self.init（attributedString.string）
}
}
让encodedString=“周末&8216；秋天之王&8217；”
让decodedString=String（htmlEncodedString:encodedString）

@akashivsky的答案很好，并演示了如何利用

NSAttributedString

解码HTML实体。一个可能的缺点（正如他所说）是所有的HTML标记也被删除了，所以

<strong> 4 &lt; 5 &amp; 3 &gt; 2</strong>

但这在iOS上不可用

这里是一个纯粹的Swift实现。它解码字符实体引用，如使用字典的

，以及所有数字字符像

&64

或

&x20ac

这样的实体。（请注意，我没有列出所有 252个HTML实体。）

Swift 4:

// Mapping from XML/HTML character entity reference to character
// From http://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
private let characterEntities : [ Substring : Character ] = [
    // XML predefined entities:
    "&quot;"    : "\"",
    "&amp;"     : "&",
    "&apos;"    : "'",
    "&lt;"      : "<",
    "&gt;"      : ">",

    // HTML character entity references:
    "&nbsp;"    : "\u{00a0}",
    // ...
    "&diams;"   : "♦",
]

extension String {

    /// Returns a new string made by replacing in the `String`
    /// all HTML character entity references with the corresponding
    /// character.
    var stringByDecodingHTMLEntities : String {

        // ===== Utility functions =====

        // Convert the number in the string to the corresponding
        // Unicode character, e.g.
        //    decodeNumeric("64", 10)   --> "@"
        //    decodeNumeric("20ac", 16) --> "€"
        func decodeNumeric(_ string : Substring, base : Int) -> Character? {
            guard let code = UInt32(string, radix: base),
                let uniScalar = UnicodeScalar(code) else { return nil }
            return Character(uniScalar)
        }

        // Decode the HTML character entity to the corresponding
        // Unicode character, return `nil` for invalid input.
        //     decode("&#64;")    --> "@"
        //     decode("&#x20ac;") --> "€"
        //     decode("&lt;")     --> "<"
        //     decode("&foo;")    --> nil
        func decode(_ entity : Substring) -> Character? {

            if entity.hasPrefix("&#x") || entity.hasPrefix("&#X") {
                return decodeNumeric(entity.dropFirst(3).dropLast(), base: 16)
            } else if entity.hasPrefix("&#") {
                return decodeNumeric(entity.dropFirst(2).dropLast(), base: 10)
            } else {
                return characterEntities[entity]
            }
        }

        // ===== Method starts here =====

        var result = ""
        var position = startIndex

        // Find the next '&' and copy the characters preceding it to `result`:
        while let ampRange = self[position...].range(of: "&") {
            result.append(contentsOf: self[position ..< ampRange.lowerBound])
            position = ampRange.lowerBound

            // Find the next ';' and copy everything from '&' to ';' into `entity`
            guard let semiRange = self[position...].range(of: ";") else {
                // No matching ';'.
                break
            }
            let entity = self[position ..< semiRange.upperBound]
            position = semiRange.upperBound

            if let decoded = decode(entity) {
                // Replace by decoded character:
                result.append(decoded)
            } else {
                // Invalid entity, copy verbatim:
                result.append(contentsOf: entity)
            }
        }
        // Copy remaining characters to `result`:
        result.append(contentsOf: self[position...])
        return result
    }
}

// Mapping from XML/HTML character entity reference to character
// From http://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
private let characterEntities : [ String : Character ] = [
    // XML predefined entities:
    "&quot;"    : "\"",
    "&amp;"     : "&",
    "&apos;"    : "'",
    "&lt;"      : "<",
    "&gt;"      : ">",

    // HTML character entity references:
    "&nbsp;"    : "\u{00a0}",
    // ...
    "&diams;"   : "♦",
]

extension String {

    /// Returns a new string made by replacing in the `String`
    /// all HTML character entity references with the corresponding
    /// character.
    var stringByDecodingHTMLEntities : String {

        // ===== Utility functions =====

        // Convert the number in the string to the corresponding
        // Unicode character, e.g.
        //    decodeNumeric("64", 10)   --> "@"
        //    decodeNumeric("20ac", 16) --> "€"
        func decodeNumeric(_ string : String, base : Int) -> Character? {
            guard let code = UInt32(string, radix: base),
                let uniScalar = UnicodeScalar(code) else { return nil }
            return Character(uniScalar)
        }

        // Decode the HTML character entity to the corresponding
        // Unicode character, return `nil` for invalid input.
        //     decode("&#64;")    --> "@"
        //     decode("&#x20ac;") --> "€"
        //     decode("&lt;")     --> "<"
        //     decode("&foo;")    --> nil
        func decode(_ entity : String) -> Character? {

            if entity.hasPrefix("&#x") || entity.hasPrefix("&#X"){
                return decodeNumeric(entity.substring(with: entity.index(entity.startIndex, offsetBy: 3) ..< entity.index(entity.endIndex, offsetBy: -1)), base: 16)
            } else if entity.hasPrefix("&#") {
                return decodeNumeric(entity.substring(with: entity.index(entity.startIndex, offsetBy: 2) ..< entity.index(entity.endIndex, offsetBy: -1)), base: 10)
            } else {
                return characterEntities[entity]
            }
        }

        // ===== Method starts here =====

        var result = ""
        var position = startIndex

        // Find the next '&' and copy the characters preceding it to `result`:
        while let ampRange = self.range(of: "&", range: position ..< endIndex) {
            result.append(self[position ..< ampRange.lowerBound])
            position = ampRange.lowerBound

            // Find the next ';' and copy everything from '&' to ';' into `entity`
            if let semiRange = self.range(of: ";", range: position ..< endIndex) {
                let entity = self[position ..< semiRange.upperBound]
                position = semiRange.upperBound

                if let decoded = decode(entity) {
                    // Replace by decoded character:
                    result.append(decoded)
                } else {
                    // Invalid entity, copy verbatim:
                    result.append(entity)
                }
            } else {
                // No matching ';'.
                break
            }
        }
        // Copy remaining characters to `result`:
        result.append(self[position ..< endIndex])
        return result
    }
}

// Mapping from XML/HTML character entity reference to character
// From http://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
private let characterEntities : [ String : Character ] = [
    // XML predefined entities:
    "&quot;"    : "\"",
    "&amp;"     : "&",
    "&apos;"    : "'",
    "&lt;"      : "<",
    "&gt;"      : ">",

    // HTML character entity references:
    "&nbsp;"    : "\u{00a0}",
    // ...
    "&diams;"   : "♦",
]

extension String {

    /// Returns a new string made by replacing in the `String`
    /// all HTML character entity references with the corresponding
    /// character.
    var stringByDecodingHTMLEntities : String {

        // ===== Utility functions =====

        // Convert the number in the string to the corresponding
        // Unicode character, e.g.
        //    decodeNumeric("64", 10)   --> "@"
        //    decodeNumeric("20ac", 16) --> "€"
        func decodeNumeric(string : String, base : Int32) -> Character? {
            let code = UInt32(strtoul(string, nil, base))
            return Character(UnicodeScalar(code))
        }

        // Decode the HTML character entity to the corresponding
        // Unicode character, return `nil` for invalid input.
        //     decode("&#64;")    --> "@"
        //     decode("&#x20ac;") --> "€"
        //     decode("&lt;")     --> "<"
        //     decode("&foo;")    --> nil
        func decode(entity : String) -> Character? {

            if entity.hasPrefix("&#x") || entity.hasPrefix("&#X"){
                return decodeNumeric(entity.substringFromIndex(entity.startIndex.advancedBy(3)), base: 16)
            } else if entity.hasPrefix("&#") {
                return decodeNumeric(entity.substringFromIndex(entity.startIndex.advancedBy(2)), base: 10)
            } else {
                return characterEntities[entity]
            }
        }

        // ===== Method starts here =====

        var result = ""
        var position = startIndex

        // Find the next '&' and copy the characters preceding it to `result`:
        while let ampRange = self.rangeOfString("&", range: position ..< endIndex) {
            result.appendContentsOf(self[position ..< ampRange.startIndex])
            position = ampRange.startIndex

            // Find the next ';' and copy everything from '&' to ';' into `entity`
            if let semiRange = self.rangeOfString(";", range: position ..< endIndex) {
                let entity = self[position ..< semiRange.endIndex]
                position = semiRange.endIndex

                if let decoded = decode(entity) {
                    // Replace by decoded character:
                    result.append(decoded)
                } else {
                    // Invalid entity, copy verbatim:
                    result.appendContentsOf(entity)
                }
            } else {
                // No matching ';'.
                break
            }
        }
        // Copy remaining characters to `result`:
        result.appendContentsOf(self[position ..< endIndex])
        return result
    }
}

let yourStringEncoded = yourStringWithHtmlcode.htmlDecoded

//从XML/HTML字符实体引用到字符的映射
//从http://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references
私有let characterEntities:[子字符串：字符]=[
//XML预定义实体：
"""    : "\"",
“&；”：“&”，
“&apos；”：“”，
""      : "",
//HTML字符实体引用：
“”：“\u{00a0}”，
// ...
“&diams；”：”♦",
]
扩展字符串{
///返回通过在`字符串中替换而生成的新字符串`
///所有HTML字符实体引用都具有相应的
///性格。
var stringByDecodingHTMLEntities:String{
//====实用程序功能=====
//将字符串中的数字转换为相应的数字
//Unicode字符，例如。
//解码数字（“64”，10）-->“@”
//解码数字（“20ac”，16）-->“€”
func decodeNumeric（uString:Substring，base:Int）->字符{
guard let code=UInt32（字符串，基数：基数），
让uniScalar=UnicodeScalar（code）else{return nil}
返回字符（uniScalar）
}
//将HTML字符实体解码为相应的
//Unicode字符，对于无效输入返回'nil'。
//解码（@；“”-->“@”
//解码（€；“”-->“€”
//解码（“”-->“这将是我的方法。您可以添加Michael瀑布提到的实体词典
extension String {
    func htmlDecoded()->String {

        guard (self != "") else { return self }

        var newStr = self

        let entities = [
            "&quot;"    : "\"",
            "&amp;"     : "&",
            "&apos;"    : "'",
            "&lt;"      : "<",
            "&gt;"      : ">",
        ]

        for (name,value) in entities {
            newStr = newStr.stringByReplacingOccurrencesOfString(name, withString: value)
        }
        return newStr
    }
}

或
Swift 2版本
使用：
Swift 3版本
我正在寻找一个纯Swift 3.0实用程序，以从HTML字符引用（即macOS和Linux上的服务器端Swift应用程序）转义到/unescape，但没有找到任何全面的解决方案，因此我编写了自己的实现：
该包名为HTMLEntities
，可与HTML4命名字符引用以及十六进制/十二进制数字字符引用一起使用，它将根据W3 HTML5规范识别特殊的数字字符引用（即和#x80；
应不替换为欧元符号（unicodeU+20AC
）而不是作为U+0080
的unicode字符，并且在取消切换时，某些范围的数字字符引用应替换为替换字符U+FFFD
）
用法示例：
import HTMLEntities

// encode example
let html = "<script>alert(\"abc\")</script>"

print(html.htmlEscape())
// Prints ”&lt;script&gt;alert(&quot;abc&quot;)&lt;/script&gt;"

// decode example
let htmlencoded = "&lt;script&gt;alert(&quot;abc&quot;)&lt;/script&gt;"

print(htmlencoded.htmlUnescape())
// Prints ”<script>alert(\"abc\")</script>"

编辑：HTMLEntities
从2.0.0版开始，现在支持HTML5命名字符引用。还实现了符合规范的解析。
更新了Swift 3上的答案
extension String {
    init?(htmlEncodedString: String) {
        let encodedData = htmlEncodedString.data(using: String.Encoding.utf8)!
        let attributedOptions = [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType]

        guard let attributedString = try? NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil) else {
            return nil
        }
        self.init(attributedString.string)
   }

计算的var版本
具有实际字体大小转换的Swift 3.0版本
通常，如果您直接将HTML内容转换为属性字符串，则字体大小会增加。您可以尝试将HTML字符串转换为属性字符串，然后再次转换以查看差异
相反，这里是实际大小转换，通过在所有字体上应用0.75的比例，确保字体大小不会改变：
extension String {
    func htmlAttributedString() -> NSAttributedString? {
        guard let data = self.data(using: String.Encoding.utf16, allowLossyConversion: false) else { return nil }
        guard let attriStr = try? NSMutableAttributedString(
            data: data,
            options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],
            documentAttributes: nil) else { return nil }
        attriStr.beginEditing()
        attriStr.enumerateAttribute(NSFontAttributeName, in: NSMakeRange(0, attriStr.length), options: .init(rawValue: 0)) {
            (value, range, stop) in
            if let font = value as? UIFont {
                let resizedFont = font.withSize(font.pointSize * 0.75)
                attriStr.addAttribute(NSFontAttributeName,
                                         value: resizedFont,
                                         range: range)
            }
        }
        attriStr.endEditing()
        return attriStr
    }
}

Swift 4版本
Swift 4
extension String {
    var replacingHTMLEntities: String? {
        do {
            return try NSAttributedString(data: Data(utf8), options: [
                .documentType: NSAttributedString.DocumentType.html,
                .characterEncoding: String.Encoding.utf8.rawValue
            ], documentAttributes: nil).string
        } catch {
            return nil
        }
    }
}

extension String {

    mutating func toHtmlEncodedString() {
        guard let encodedData = self.data(using: .utf8) else {
            return
        }

        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.documentType.rawValue): NSAttributedString.DocumentType.html,
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.characterEncoding.rawValue): String.Encoding.utf8.rawValue
        ]

        do {
            let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
            self = attributedString.string
        }
        catch {
            print("Error: \(error)")
        }
    }

func decodeHTML(string: String) -> String? {

    var decodedString: String?

    if let encodedData = string.data(using: .utf8) {
        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ]

        do {
            decodedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil).string
        } catch {
            print("\(error.localizedDescription)")
        }
    }

    return decodedString
}

简单用法
let clean = "Weeknd &#8216;King Of The Fall&#8217".replacingHTMLEntities ?? "default value"

Swift 4
extension String {
    var replacingHTMLEntities: String? {
        do {
            return try NSAttributedString(data: Data(utf8), options: [
                .documentType: NSAttributedString.DocumentType.html,
                .characterEncoding: String.Encoding.utf8.rawValue
            ], documentAttributes: nil).string
        } catch {
            return nil
        }
    }
}

extension String {

    mutating func toHtmlEncodedString() {
        guard let encodedData = self.data(using: .utf8) else {
            return
        }

        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.documentType.rawValue): NSAttributedString.DocumentType.html,
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.characterEncoding.rawValue): String.Encoding.utf8.rawValue
        ]

        do {
            let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
            self = attributedString.string
        }
        catch {
            print("Error: \(error)")
        }
    }

func decodeHTML(string: String) -> String? {

    var decodedString: String?

    if let encodedData = string.data(using: .utf8) {
        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ]

        do {
            decodedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil).string
        } catch {
            print("\(error.localizedDescription)")
        }
    }

    return decodedString
}

Swift 4
extension String {
    var replacingHTMLEntities: String? {
        do {
            return try NSAttributedString(data: Data(utf8), options: [
                .documentType: NSAttributedString.DocumentType.html,
                .characterEncoding: String.Encoding.utf8.rawValue
            ], documentAttributes: nil).string
        } catch {
            return nil
        }
    }
}

extension String {

    mutating func toHtmlEncodedString() {
        guard let encodedData = self.data(using: .utf8) else {
            return
        }

        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.documentType.rawValue): NSAttributedString.DocumentType.html,
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.characterEncoding.rawValue): String.Encoding.utf8.rawValue
        ]

        do {
            let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
            self = attributedString.string
        }
        catch {
            print("Error: \(error)")
        }
    }

func decodeHTML(string: String) -> String? {

    var decodedString: String?

    if let encodedData = string.data(using: .utf8) {
        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ]

        do {
            decodedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil).string
        } catch {
            print("\(error.localizedDescription)")
        }
    }

    return decodedString
}



字符串扩展计算变量
没有额外的保护、做、抓等
如果解码失败，则返回原始字符串
<
extension String {

    init(htmlEncodedString: String) {
        self.init()
        guard let encodedData = htmlEncodedString.data(using: .utf8) else {
            self = htmlEncodedString
            return
        }

        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ]

        do {
            let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
            self = attributedString.string
        } 
        catch {
            print("Error: \(error)")
            self = htmlEncodedString
        }
    }
}

extension String {
    var replacingHTMLEntities: String? {
        do {
            return try NSAttributedString(data: Data(utf8), options: [
                .documentType: NSAttributedString.DocumentType.html,
                .characterEncoding: String.Encoding.utf8.rawValue
            ], documentAttributes: nil).string
        } catch {
            return nil
        }
    }
}

let clean = "Weeknd &#8216;King Of The Fall&#8217".replacingHTMLEntities ?? "default value"

extension String {

    mutating func toHtmlEncodedString() {
        guard let encodedData = self.data(using: .utf8) else {
            return
        }

        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.documentType.rawValue): NSAttributedString.DocumentType.html,
            NSAttributedString.DocumentReadingOptionKey(rawValue: NSAttributedString.DocumentAttributeKey.characterEncoding.rawValue): String.Encoding.utf8.rawValue
        ]

        do {
            let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
            self = attributedString.string
        }
        catch {
            print("Error: \(error)")
        }
    }

extension String {
    var htmlDecoded: String {
        let decoded = try? NSAttributedString(data: Data(utf8), options: [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ], documentAttributes: nil).string

        return decoded ?? self
    }
}

myString = String(htmlString: encodedString)

extension String {

    init(htmlString: String) {
        self.init()
        guard let encodedData = htmlString.data(using: .utf8) else {
            self = htmlString
            return
        }

        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
           .documentType: NSAttributedString.DocumentType.html,
           .characterEncoding: String.Encoding.utf8.rawValue
        ]

        do {
            let attributedString = try NSAttributedString(data: encodedData,
                                                          options: attributedOptions,
                                                          documentAttributes: nil)
            self = attributedString.string
        } catch {
            print("Error: \(error.localizedDescription)")
            self = htmlString
        }
    }
}

textField.attributedText = try? NSAttributedString(htmlString: encodedString)

extension NSAttributedString {

    convenience init(htmlString html: String) throws {
        try self.init(data: Data(html.utf8), options: [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
            ], documentAttributes: nil)
    }

}

func decodeHTML(string: String) -> String? {

    var decodedString: String?

    if let encodedData = string.data(using: .utf8) {
        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ]

        do {
            decodedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil).string
        } catch {
            print("\(error.localizedDescription)")
        }
    }

    return decodedString
}

extension String {
    var htmlDecoded: String {
        let decoded = try? NSAttributedString(data: Data(utf8), options: [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
            ], documentAttributes: nil).string

        return decoded ?? self
    }
}

let yourStringEncoded = yourStringWithHtmlcode.htmlDecoded

var yourNewString = String(yourStringEncoded.filter { !"\n\t\r".contains($0) })
yourNewString = yourNewString.replacingOccurrences(of: "\'", with: "", options: NSString.CompareOptions.literal, range: nil)

var htmlDecoded: String {


    let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [

        NSAttributedString.DocumentReadingOptionKey.documentType : NSAttributedString.DocumentType.html,
        NSAttributedString.DocumentReadingOptionKey.characterEncoding : String.Encoding.utf8.rawValue
    ]


    let decoded = try? NSAttributedString(data: Data(utf8), options: attributedOptions
        , documentAttributes: nil).string

    return decoded ?? self
} 

+(NSString *) decodeHTMLEnocdedString:(NSString *)htmlEncodedString {
    if (!htmlEncodedString) {
        return nil;
    }

    NSData *data = [htmlEncodedString dataUsingEncoding:NSUTF8StringEncoding];
    NSDictionary *attributes = @{NSDocumentTypeDocumentAttribute:     NSHTMLTextDocumentType,
                             NSCharacterEncodingDocumentAttribute:     @(NSUTF8StringEncoding)};
    NSAttributedString *attributedString = [[NSAttributedString alloc]     initWithData:data options:attributes documentAttributes:nil error:nil];
    return [attributedString string];
}

import UIKit

extension String {

    init(htmlEncodedString: String) {
        self.init()
        guard let encodedData = htmlEncodedString.data(using: .utf8) else {
            self = htmlEncodedString
            return
        }

        let attributedOptions: [NSAttributedString.DocumentReadingOptionKey : Any] = [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ]

        do {
            let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil)
            self = attributedString.string
        } 
        catch {
            print("Error: \(error)")
            self = htmlEncodedString
        }
    }
}