- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ // 1.URL NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/order"]; // 2.请求 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; // 3.请求方法 request.HTTPMethod = @"POST"; // 4.设置请求体（请求参数） // 创建一个描述订单信息的JSON数据 NSDictionary *orderInfo = @{ @"shop_id" : @"1243324", @"shop_name" : @"啊哈哈哈", @"user_id" : @"899" }; //把字典转换为可以传输的NSData类型 NSData *json = [NSJSONSerialization dataWithJSONObject:orderInfo options:NSJSONWritingPrettyPrinted error:nil]; request.HTTPBody = json; // 5.设置请求头：这次请求体的数据不再是普通的参数，而是一个JSON数据 [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; // 6.发送请求 [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) { if (data == nil || connectionError) return; NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil]; NSString *error = dict[@"error"]; if (error) { [MBProgressHUD showError:error]; } else { NSString *success = dict[@"success"]; [MBProgressHUD showSuccess:success]; } }];}