Swift 2 How to encode from ASCII to Hexadecimal
问题 I have a simple ASCII string and i want to convert it to hexadecimal (base16). I'm using xCode 7 (so i'm on IOS9) but i can't find any solution anywhere. I tried to change the format of my string: StringToConvert(String(format: "%02hhx", $0)) Thanks for your help :) 回答1: "abcdefghijklmnopqrstuvwxyz0123456789".utf8.map{ $0 }.reduce("") { $0 + String($1, radix: 16, uppercase: false) } modify it by your needs "ABCD".utf8.map{ $0 }.reduce("") { $0 + "0x" + String($1, radix: 16, uppercase: false)