How the illegal network request address in IOS development solves _ios

NSString *const kwebsite = @http://image.baidu.com/search/index?tn=baiduimage&ipn=r&ct=201326592&cl=2 &lm=-1&st=-1&fr=&sf=1&fmq=1459502303089_R&pv=&ic=0&nc=1&z=&se=1& Showtab=0&fb=0&width=&height=&face=0&istype=2&ie=utf-8&word= scenery;

This is a picture of Baidu picture in the category of the address, when I send a request, the Unsuppotedurl error occurred

Baidu a bit, the reason for the error is that the URL can not contain the ASCII character set, kanji, such characters must be escaped characters

NSString *urlstring = [Kwebsite stringbyaddingpercentencodingwithallowedcharacters:[nscharacterset Urlqueryallowedcharacterset]];

The above is a small set to introduce the development of the iOS in the illegal Internet request address all the narration, I hope to help you, if you have any questions welcome to my message, small series will promptly reply to everyone!