通过添加百分比快速创建字符串

Question

如何将其转换为当前的Swift语法。我很难过。

extension String {
    var escaped: String {
        return CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,self as CFString!,"[]." as CFString!,":/?&=;+!#$()@',*" as CFString!,CFStringConvertNSStringEncodingToEncoding(String.Encoding.utf8.rawValue)) as String
    }
}

Answer 1

简单地：

var escaped: String {
   let allowedCharacters = CharacterSet(charactersIn: ":/?&=;+!#$()@',*")
   return addingPercentEncoding(withAllowedCharacters: allowedCharacters)!
}