Ios url encoding and decoding

1. url Encoding

When the HTTP request in IOS encounters Chinese characters, it needs to be converted into a UTF-8, the method used is:

Nsstring * encodingstring = [urlstring stringbyaddingpercentescapesusingencoding: nsutf8stringencoding];

2. URL Decoding

After the request, the returned data, how to display the format: % 3A % 2f % 2f, at this time we need to perform UTF-8 decoding, the method used is:

Nsstring * STR = [model. album_name stringbyreplacingpercentescapesusingencoding: nsutf8stringencoding];