POST 上传 JSON 数据

//
//  ViewController.m
//  03-post上传json
//
//  Created by jerry on 15/10/10.
//  Copyright (c) 2015年 jerry. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// 1. url
NSURL *url = [NSURL URLWithString:@"http://127.0.0.1/post/postjson.php"];

// 2. post Request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:1 timeoutInterval:2.0f];
// 2.1 set HTTPMethod
request.HTTPMethod = @"POST";

// 2.2 UpLoad JSON Type Data
// 序列化，将NSArray/NSDictionary转换成特殊数据类型的二进制数据。
// 反序列化 将服务器返回的二进制数据转成NSArray/NSDictionary
NSDictionary *dict1 = @{@"name":@"xiaofeng",@"age":@"18"};
NSDictionary *dict2 = @{@"name":@"xiaosan",@"age":@"21"};

NSArray *array = @[dict1,dict2];
/**
- Top level object is an NSArray or NSDictionary
顶级节点是字典或者数组
- All objects are NSString, NSNumber, NSArray, NSDictionary, or NSNull
所有的对象是 NSString, NSNumber, NSArray, NSDictionary, or NSNull
- All dictionary keys are NSStrings
所有字典的key 是 NSString
- NSNumbers are not NaN or infinity
NSNumbers必须指定，不能是无穷大

+ (BOOL)isValidJSONObject:(id)obj;
用来检验给定的对象是否能够被序列化
*/
//    NSString *str = @"{\"username\":\"xiangfeng\",\"age\":\"18\"}";
if (![NSJSONSerialization isValidJSONObject:array]) {
NSLog(@"格式不正确，不能被序列化！");
return ;
}
request.HTTPBody = [NSJSONSerialization dataWithJSONObject:array options:0 error:NULL];

// connection
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
// 反序列化的一个处理
id result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"%@",result);
}];

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end