ios - stored unreadable text - NSJSONSerialization -


i new objective c. got situation causes me lot of trouble... in app, there textfield people can enter comments , store in server , display them somewhere else. however, of these comments in different languages... e.g. chinese... , returns unreadable strings such "ä½ å¥½" in server. pretty sure server set properly... question is: there standard ways/methods can server recognize foreign text?

many in advance!

the followings codes.

    nsmutabledictionary *query = [[nsmutabledictionary alloc] init];       [query setvalue:usercommenttextfield.text forkey:@"comment"];      nsdata *postdata = [nsjsonserialization datawithjsonobject:query options:0 error:null]; // set dictionary json      nsmutableurlrequest * req = [nsmutableurlrequest requestwithurl:[nsurl urlwithstring:@"http://testurl"]];      [req sethttpmethod:@"post"];      [req sethttpbody:postdata];      [req setvalue:@"text/html" forhttpheaderfield:@"content-type"];      [req setvalue:[nsstring stringwithformat:@"%ld", (unsigned long)[postdata length]] forhttpheaderfield:@"content-length"];       nsurlconnection *connection = [[nsurlconnection alloc] initwithrequest:req delegate:self];


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