Json文件/网址解析

//
//  main.m
//  OC8-Json文件解析
//
//  Created by qianfeng on 15/6/23.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import <Foundation/Foundation.h>
//Json
//Javascript 语法的子集
//key : value 类似OC中的键值对
//1.json文件 的最外层结构通常为字典或者数组,以字典居多.
//2.json数据可以为 基本类型数据,字符串对象,数组对象([]包含),字典对象({}包含),null类型,bool类型
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        
#if 0
        //1.先把文件的数据读成NSdata对象.
        // NSData *data =[NSData dataWithContentsOfFile:<#(NSString *)#>];
        NSString *fileString =[NSString stringWithContentsOfFile:@"/Users/qianfeng/Downloads/jsonUserList.txt" encoding:NSUTF8StringEncoding error:nil];
        NSData *data =[fileString dataUsingEncoding:NSUTF8StringEncoding];
        //2.解析json数据,解析成字典对象还是数组对象,看文件结构
        NSDictionary *ditc =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
        
        NSLog(@" %@",ditc);
        
        NSArray *users =[ditc objectForKey:@"users"];
        for (NSDictionary *dict in users) {
            NSLog(@"name= %@",[dict objectForKey:@"username"]);
        }
        
#endif
        
        
        //Json 网址解析
        
        
        NSURL *url =[NSURL URLWithString:@"http://www.oschina.net/code/snippet_160697_34201"];
        NSString *urlString =[NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
         //NSLog(@"%@",urlString);
        NSData *data =[urlString dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary *weatherInfo =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
         NSLog(@" %@",weatherInfo);
        
    }
    return 0;
}