在Swift中将Unicode符号或其XML / HTML实体转换为其Unicode数字

更新： Xpre 9•Swift 4

extension String {    var html2AttributedString: NSAttributedString? {        do { return try NSAttributedString(data: Data(utf8), options: [.documentType: NSAttributedString.documentType.html, .characterEncoding: String.Encoding.utf8.rawValue], documentAttributes: nil)        } catch { print(error) return nil        }    }    var unipres: [UInt32] { return unipreScalars.map{$0.value} }}

Xpre 8•Swift 3

extension String {    var html2AttributedString: NSAttributedString? {        do { return try NSAttributedString(data: Data(utf8), options: [NSdocumentTypedocumentAttribute: NSHTMLTextdocumentType, NSCharacterEncodingdocumentAttribute: String.Encoding.utf8.rawValue], documentAttributes: nil)        } catch { print(error) return nil        }    }    var unipres: [UInt32] { return unipreScalars.map{$0.value} }}

let str = "<span>&euro;€</span>".html2AttributedString?.string ?? ""print(str.unipres)     // [8364, 8364]