iOS开发 -- 发送JSON数据给服务器

1. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
2. {
3. // 1.URL
4. NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/order"];
6. // 2.请求
7. NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
9. // 3.请求方法
10. request.HTTPMethod = @"POST";
12. // 4.设置请求体（请求参数）
13. // 创建一个描述订单信息的JSON数据
14. NSDictionary *orderInfo = @{
15. @"shop_id" : @"1243324",
16. @"shop_name" : @"啊哈哈哈",
17. @"user_id" : @"899"
18. };
19. //把字典转换为可以传输的NSData类型
20. NSData *json = [NSJSONSerialization dataWithJSONObject:orderInfo options:NSJSONWritingPrettyPrinted error:nil];
21. request.HTTPBody = json;
23. // 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
24. [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
26. // 6.发送请求
27. [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
28. if (data == nil || connectionError) return;
29. NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
30. NSString *error = dict[@"error"];
31. if (error) {
32. [MBProgressHUD showError:error];
33. } else {
34. NSString *success = dict[@"success"];
35. [MBProgressHUD showSuccess:success];
36. }
37. }];
39. }