[iOS 多线程 & 网络

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":@"21"};
    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