iphone开发之iphone解析xml&json-2

解析json文件示例。

首先在项目中加入解析json的相关包。

1，JSON.h 

2，NSObject+SBJSON.h & NSObject+SBJSON.m

3，NSString+SBJSON.h & NSString+SBJSON.m

4，SBJSON.h & SBJSON.m

代码1

 

 1 #import <UIKit/UIKit.h>
 2 
 3 @interface jsonTestAppDelegate : NSObject <UIApplicationDelegate> {
 4     UIWindow *window;
 5 }
 6 
 7 @property (nonatomic, retain) IBOutlet UIWindow *window;
 8 -(void)json1;
 9 -(void)json2;
10 -(void)json3;
11 -(void)json4;
12 @end

代码2

 

  1 #import "jsonTestAppDelegate.h"
  2 #import "SBJSON.h"
  3 @implementation jsonTestAppDelegate
  4 
  5 @synthesize window;
  6 //{"recommend":[{ },{ },{ },{ },{ }]}
  7 //{"recommend":"资讯机器人","dog":"狗仔机器人"};
  8 NSString *str1 = @"{\"recommend\":\"资讯机器人\",\"dog\":\"狗仔机器人\"}";
  9 NSString *str2=@"{\"data\":{\"user\":\"vcom\",\"userToken\":\"xx\"}}";
 10 NSString *str3 =@"{\"data\":[{\"recommend\":\"资讯机器人\",\"dog\":\"狗仔机器人\"}],\"data2\":[{\"recommend\":\"资讯机器人\",\"dog\":\"狗仔机器人\"}] }";
 11 NSString *str4 = @"{\"data\":[{\"recommend\":\"资讯机器人\",\"dog\":\"狗仔机器人\"},{\"recommend\":\"资讯机器人2\",\"dog\":\"狗仔机器人2\"}]}";
 12 - (void)applicationDidFinishLaunching:(UIApplication *)application {    
 13 
 14     //[self json1];
 15 //[self json2];
 16 //[self json3];
 17     [self json4];
 18     [window makeKeyAndVisible];
 19 }
 20 
 21 //{"recommend":"资讯机器人","dog":"狗仔机器人"}
 22 -(void)json1{
 23     NSLog(@"要解析的字符串%@",str1);
 24     //创建JSON对象
 25     SBJSON *json = [[SBJSON new] autorelease];
 26     
 27     NSDictionary *jsonDic = [json objectWithString:str1 error:nil];
 28     
 29     NSString *s=[jsonDic objectForKey:@"recommend"]; 
 30     NSString *s2=[jsonDic objectForKey:@"dog"]; 
 31     
 32     NSLog(@"%@",s);
 33     NSLog(@"%@",s2);
 34 }
 35 
 36 //{"data":{"user":"vcom","userToken":"xx"},"data2":{"user":"vcom","userToken":"xx"}}
 37 -(void)json2{
 38     NSLog(@"要解析的字符串%@",str2);
 39     SBJSON *json = [[SBJSON new] autorelease];
 40     NSDictionary *jsonDic = [json objectWithString:str2 error:nil];
 41     
 42     NSDictionary  *userlist=nil;
 43     //遍历大字典中所有的键
 44     for(NSString *key in jsonDic)
 45     {
 46         if([key compare:@"data"] == NSOrderedSame)
 47         {
 48             userlist=[jsonDic objectForKey:key];
 49              
 50             NSString *s2=[userlist objectForKey:@"user"];
 51             NSLog(@"======%@",s2);
 52         }
 53     }
 54     
 55 }
 56 
 57 //{"data":[{"recommend":"资讯机器人","dog":"狗仔机器人"}],"data2":[{"recommend":"资讯机器人","dog":"狗仔机器人"}] }
 58 -(void)json3{
 59  NSLog(@"要解析的字符串%@",str3);
 60     SBJSON *json = [[SBJSON new] autorelease];
 61     NSDictionary *jsonDic = [json objectWithString:str3 error:nil];
 62     //NSArray *array=[jsonDic objectForKey:@"data"];
 63 //    NSDictionary *dict=[array objectAtIndex:0];
 64 //    NSString *rec=[dict objectForKey:@"recommend"];
 65     
 66     NSMutableArray  *userlist=nil;
 67     for(NSString *key in jsonDic)
 68     {
 69         if([key isEqualToString:@"data2"])
 70         {
 71             userlist=[jsonDic objectForKey:key];
 72             //遍历数组中的每一个字典
 73             for(NSDictionary *dic in userlist){
 74                 NSString *s2=[dic objectForKey:@"dog"];
 75                 NSLog(@"******%@",s2);
 76             }
 77         }
 78     }
 79     
 80 }
 81 
 82 //{"data":[{"recommend":"资讯机器人","dog":"狗仔机器人"},{"recommend":"资讯机器人2","dog":"狗仔机器人2"}]}
 83 -(void)json4{
 84     NSLog(@"要解析的字符串%@",str4);
 85     SBJSON *json = [[SBJSON new] autorelease];
 86     NSDictionary *jsonDic = [json objectWithString:str4 error:nil];
 87      
 88     NSMutableArray  *userlist;
 89     for(NSString *key in jsonDic)
 90     {
 91         NSLog(@"key:%@",key);
 92         if([key compare:@"data"] == NSOrderedSame)
 93         {
 94             userlist=[jsonDic objectForKey:key];
 95             NSLog(@"------%@",userlist);
 96             NSLog(@"长度:%D",[userlist count]);
 97          
 98             for(NSDictionary *dic in userlist){
 99               
100                 NSString *s2=[dic objectForKey:@"dog"];
101                 NSLog(@"解析的内容:%@",s2);
102                 
103             }
104         }
105     }
106     
107 }
108 
109 - (void)dealloc {
110     [window release];
111     [super dealloc];
112 }
113 
114
115 @end