iOS开发中以application/json上传文件实例详解

NSString *accessUrl = [NSString stringWithFormat:@"%@/xxx",@"https://www.xxxxx.com:xxxx"]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:accessUrl]]; request.HTTPMethod = @"POST"; //设置请求头 [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; //设置请求体 NSMutableData *body = [NSMutableData data]; [body appendData:[jsonStr dataUsingEncoding:NSUTF8StringEncoding]]; [request setHTTPBody:body]; NSHTTPURLResponse* urlResponse = nil; NSError *error = [[NSError alloc] init]; NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error]; NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; if (result == nil) {  NSLog(@"json解析失败!"); } else {  NSData *jsonData = [result dataUsingEncoding:NSUTF8StringEncoding];  NSError *err;  NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData               options:NSJSONReadingMutableContainers                error:&err];  if(err) {   NSLog(@"json解析失败：%@",err);  }  success(dic); }