iOS development--Send JSON data to the server

2. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
4. {
6. // 1.URL
8. NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/order"];
12. // 2.请求
14. NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
18. // 3.请求方法
20. request.HTTPMethod = @"POST";
24. // 4.设置请求体（请求参数）
26. // 创建一个描述订单信息的JSON数据
28. NSDictionary *orderInfo = @{
30. @"shop_id" : @"1243324",
32. @"shop_name" : @"啊哈哈哈",
34. @"user_id" : @"899"
36. };
38. //把字典转换为可以传输的NSData类型
40. NSData *json = [NSJSONSerialization dataWithJSONObject:orderInfo options:NSJSONWritingPrettyPrinted error:nil];
42. request.HTTPBody = json;
46. // 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
48. [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
52. // 6.发送请求
54. [nsurlconnection:request queue:[ Nsoperationqueue Mainqueue] Completionhandler :^ (nsurlresponse * Response, nsdata *< Span class= "PLN" >data, nserror*connectionerror) {
56. if ( Data == nil | | Connectionerror) return
58. NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
60. NSString *error = dict[@"error"];
62. if (error) {
64. [MBProgressHUD showError:error];
66. } else {
68. NSString *success = dict[@"success"];
70. [MBProgressHUD showSuccess:success];
72. }
74. }];
78. }

iOS development--Send JSON data to the server