//// ViewController.m// Json//// Created by City--Online on 15/4/28.// Copyright (c) 2015年 CYW. All rights reserved.//#define strUrl @"http://app.api.autohome.com.cn/autov3.2/news/newslist-a2-pm1-v3.2.0-c0-nt0-p1-s20-l0.html"#import "ViewController.h"#import "SBJson.h"#import "CJSONDeserializer.h"#import "CJSONSerializer.h"#import "JSONKit.h"@interface ViewController ()@property(nonatomic,strong)NSString *stringData;@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad];// json解析 NSURL *url=[NSURL URLWithString:strUrl]; NSError *err=NULL; //获取Json字符串 NSString *Jsonstr=[NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&err]; NSData *data=[Jsonstr dataUsingEncoding:NSUTF8StringEncoding];// 第一种:IOS5以上自带的JSONObjectWithData// typedef NS_OPTIONS(NSUInteger, NSJSONReadingOptions) {// NSJSONReadingMutableContainers = (1UL << 0),//返回可变容器，NSMutableDictionary或NSMutableArray// NSJSONReadingMutableLeaves = (1UL << 1),//返回的JSON对象中字符串的值为NSMutableString// NSJSONReadingAllowFragments = (1UL << 2)//允许JSON字符串最外层既不是NSArray也不是NSDictionary，但必须是有效的JSON Fragment。例如使用这个选项可以解析 @“123” 这样的字符串。// } //解析 NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&err]; if (err==nil) { NSLog(@"%@",[dic objectForKey:@"message"]); NSArray *array=[[dic objectForKey:@"result"] objectForKey:@"focusimg"]; NSLog(@"%@",[array objectAtIndex:1]); } //生成 //判断是否能转为Json if ([NSJSONSerialization isValidJSONObject:dic]) { //转为Json NSData *data= [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil]; NSString *str=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]; NSLog(@"%@",str); //json再次转为字典 NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&err]; NSLog(@"%@",dic); }// 第二种:SBJson// 解析 //引入#import "SBJson.h" SBJsonParser *parser=[[SBJsonParser alloc]init]; NSDictionary *SBJsonDic=[parser objectWithString:Jsonstr error:nil]; NSLog(@"%@",SBJsonDic); SBJsonWriter *sbwriter=[[SBJsonWriter alloc]init]; NSString *sbstr=[sbwriter stringWithObject:SBJsonDic]; NSLog(@"%@",sbstr);// 第三种:Touch Json// 解析// #import "TouchJson/JSON/CJSONDeserializer.h" NSDictionary *touchDic=[[CJSONDeserializer deserializer] deserialize:data error:nil]; NSLog(@"%@",touchDic);// 生成 NSString *touchstr=[[NSString alloc]initWithData: [[CJSONSerializer serializer] serializeDictionary:touchDic error:nil] encoding:NSUTF8StringEncoding]; NSLog(@"%@",touchstr);// 第四种:JsonKit// 使用Jsonkit时引入第三方稍微麻烦// 第一步:引入Jsonkit// 第二步:JsonKit支持MRC，不支持ARC(伟哥指导纠正thanks)。点击Targets->Build Phases->Compile Sources中找到JsonKit.m点击输入-fno-objc-arc// 第三步:在Build Setting中Levels中搜索 Direct usage of 'isa'设置为NO //生成 NSDictionary *JsonKitDic=[Jsonstr objectFromJSONString]; NSLog(@"%@",JsonKitDic); //解析 NSString *JsonKitstr=[JsonKitDic JSONString]; NSLog(@"%@",JsonKitstr);}- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}@end
Json比较简单，直接上代码，具体说明找度娘,JsonKit在ios9中会出现闪退报错 需要下载最新的JsonKit
