[iOS 多线程 & 网络 - 2.6] - 使用POST上传JSON数据 & 多值参数

A.上传JSON

1.思路：

必须使用POST方法才能上传大量JSON数据

设置请求头：设置Content-Type

设置请求体，JSON实际相当于字典，可以用NSDictionary

NSJSONSerialization把字典数据转换成JSON二进制

 

 

2.实现

 //
 //  ViewController.m
 //  PostJsonDemo
 //
 //  Created by hellovoidworld on 15/1/28.
 //  Copyright (c) 2015年 hellovoidworld. All rights reserved.
 //

 #import "ViewController.h"

 @interface ViewController ()
 - (IBAction)postJson;

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.
 }

 - (IBAction)postJson {
     // 1.创建请求
     NSURL *url = [NSURL URLWithString:@"http://192.168.0.21:8080/MyTestServer/acceptJson"];
     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
     // 设置post发送
     request.HTTPMethod = @"POST";

     // 2.设置请求头
     [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

     // 3.设置请求体
     NSDictionary *json = @{@"name":@"tom",
                            @"age":@""};
     request.HTTPBody = [NSJSONSerialization dataWithJSONObject:json options:NSJSONWritingPrettyPrinted error:nil];

     // 4.发送请求
     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
         NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil]);
     }];

 }
 @end

 

 

B.多值参数

1.概念

一个参数名对应多个参数值

http://localhost:8080/MyTestServer/upload?type=aaa&type=bbb&type=ccc

这样在服务器接收到的就是一个数组