JSONKit

发布时间：2020-12-16 19:53:30 所属栏目：百科来源：网络整理

导读：1.将字典或者数组反序列化为NSString. NSMutableDictionary *jsonDic = [NSMutableDictionary dictionary]; NSMutableDictionary *alert = [NSMutableDictionary dictionary]; NSMutableDictionary *aps = [NSMutableDictionary dictionary]; [alert setObje

1.将字典或者数组反序列化为NSString.
NSMutableDictionary *jsonDic = [NSMutableDictionary dictionary];
NSMutableDictionary *alert = [NSMutableDictionary dictionary];
NSMutableDictionary *aps = [NSMutableDictionary dictionary];
[alert setObject:@"a msg come!" forKey:@"body"];
[aps setObject:alert forKey:@"alert"];
[aps setObject:@"3" forKey:@"bage" ];
[aps setObject:@"def.mp3" forKey:@"sound"];
[jsonDic setObject:aps forKey:@"aps"];

NSString *strJson = [jsonDic JSONString];

NSLog(@"%@",strJson);

2.将NSString反序列化为数组、字典.
NSDictionary *result = [strJson objectFromJSONString];
或者
NSDictionary *result = [dataJson objectFromJSONData];

NSLog(@"333%@",result);

JSON和Object-C中数据类型的映射关系如下表所示

Number Array Object

JSON	Objective-C
`null`	`NSNull`
trueand`false`	NSNumber
String	NSString
NSArray
`NSDictionary`

下面写一个简单的程序使用一下JSONKit（只需下载头文件以及源文件，放在项目目录下）

[cpp] view plain copy

#import<Foundation/Foundation.h>
#import"lib/JSONKit.h"
intmain(intargc,constchar*argv[]){
NSAutoreleasePool*pool=[[NSAutoreleasePoolalloc]init];
NSString*res=nil;
/*
*json格式编码
*/
//字符串
NSString*str=@"thisisansstring";
res=[strJSONString];
NSLog(@"res=%@",[NSStringstringWithString:res]);
//res="thisisansstring"
//数组
NSArray*arr=[[NSArrayalloc]initWithObjects:@"One",@"Two",@"Three",nil];
res=[arrJSONString];
NSLog(@"res=%@",[NSStringstringWithString:res]);
[arrrelease];
//res=["One","Two","Three"]
//字典类型（对象）
NSArray*arr1=[NSArrayarrayWithObjects:@"dog",@"cat",nil];
NSArray*arr2=[NSArrayarrayWithObjects:[NSNumbernumberWithBool:YES],[NSNumbernumberWithInt:30],nil];
NSDictionary*dic=[NSDictionarydictionaryWithObjectsAndKeys:arr1,@"pets",arr2,@"other",nil];
res=[dicJSONString];
NSLog(@"res=%@",[NSStringstringWithString:res]);
//res={"pets":["dog","cat"],"other":[true,30]}
/*
*json格式解码
*/
JSONDecoder*jd=[[JSONDecoderalloc]init];
//针对NSData数据
NSData*data=[dicJSONData];
NSDictionary*ret=[jdobjectWithData:data];
NSLog(@"res=%@",[retobjectForKey:@"pets"]);
//res=(
//dog,
//cat
//)
NSLog(@"res=%@",[[retobjectForKey:@"other"]objectAtIndex:0]);
//res=1
//针对NSString字符串数据
NSString*nstr=[dicJSONString];
NSDictionary*ret2=[jdobjectWithUTF8String:(constunsignedchar*)[nstrUTF8String]length:(unsignedint)[nstrlength]];
NSLog(@"res=%d",[[ret2objectForKey:@"pets"]indexOfObject:@"cat"]);
//res=1
NSLog(@"res=%@",[[ret2objectForKey:@"other"]objectAtIndex:1]);
//res=30
[jdrelease];
[pooldrain];
return0;
}

（编辑：李大同）

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