JSONKit 使用示例

@H_502_1@JSONKit是Object-C一个处理json数据的库，非常高效而且易用，对比同类型的库有非常明显的性能优势，见下图：

@H_502_1@

@H_502_1@JSON和Object-C中数据类型的映射关系如下表所示

@H_502_1@

@H_502_1@Number @H_502_1@Array @H_502_1@Object

@H_502_1@JSON	@H_502_1@Objective-C
@H_502_1@`null`	@H_502_1@`NSNull`
trueand`false`	@H_502_1@NSNumber
@H_502_1@String	@H_502_1@NSString
@H_502_1@NSArray
@H_502_1@`NSDictionary`

@H_502_1@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）

@H_502_1@[cpp] view plain copy

@H_502_1@#import<Foundation/Foundation.h>
@H_502_1@#import"lib/JSONKit.h"
@H_502_1@
@H_502_1@intmain(intargc,constchar*argv[]){
@H_502_1@NSAutoreleasePool*pool=[[NSAutoreleasePoolalloc]init];
@H_502_1@
@H_502_1@NSString*res=nil;
@H_502_1@
@H_502_1@/*
@H_502_1@*json格式编码
@H_502_1@*/
@H_502_1@
@H_502_1@//字符串
@H_502_1@NSString*str=@"thisisansstring";
@H_502_1@res=[strJSONString];
@H_502_1@NSLog(@"res=%@",[NSStringstringWithString:res]);
@H_502_1@//res="thisisansstring"
@H_502_1@
@H_502_1@
@H_502_1@//数组
@H_502_1@NSArray*arr=[[NSArrayalloc]initWithObjects:@"One",@"Two",@"Three",nil];
@H_502_1@res=[arrJSONString];
@H_502_1@NSLog(@"res=%@",[NSStringstringWithString:res]);
@H_502_1@[arrrelease];
@H_502_1@//res=["One","Two","Three"]
@H_502_1@
@H_502_1@
@H_502_1@//字典类型（对象）
@H_502_1@NSArray*arr1=[NSArrayarrayWithObjects:@"dog",@"cat",nil];
@H_502_1@NSArray*arr2=[NSArrayarrayWithObjects:[NSNumbernumberWithBool:YES],[NSNumbernumberWithInt:30],nil];
@H_502_1@NSDictionary*dic=[NSDictionarydictionaryWithObjectsAndKeys:arr1,@"pets",arr2,@"other",nil];
@H_502_1@res=[dicJSONString];
@H_502_1@NSLog(@"res=%@",[NSStringstringWithString:res]);
@H_502_1@//res={"pets":["dog","cat"],"other":[true,30]}
@H_502_1@
@H_502_1@
@H_502_1@/*
@H_502_1@*json格式解码
@H_502_1@*/
@H_502_1@JSONDecoder*jd=[[JSONDecoderalloc]init];
@H_502_1@
@H_502_1@//针对NSData数据
@H_502_1@NSData*data=[dicJSONData];
@H_502_1@NSDictionary*ret=[jdobjectWithData:data];
@H_502_1@NSLog(@"res=%@",[retobjectForKey:@"pets"]);
@H_502_1@//res=(
@H_502_1@//dog,
@H_502_1@//cat
@H_502_1@//)
@H_502_1@NSLog(@"res=%@",[[retobjectForKey:@"other"]objectAtIndex:0]);
@H_502_1@//res=1
@H_502_1@
@H_502_1@//针对NSString字符串数据
@H_502_1@NSString*nstr=[dicJSONString];
@H_502_1@NSDictionary*ret2=[jdobjectWithUTF8String:(constunsignedchar*)[nstrUTF8String]length:(unsignedint)[nstrlength]];
@H_502_1@NSLog(@"res=%d",[[ret2objectForKey:@"pets"]indexOfObject:@"cat"]);
@H_502_1@//res=1
@H_502_1@NSLog(@"res=%@",[[ret2objectForKey:@"other"]objectAtIndex:1]);
@H_502_1@//res=30
@H_502_1@
@H_502_1@[jdrelease];
@H_502_1@
@H_502_1@[pooldrain];
@H_502_1@return0;
@H_502_1@}

@H_502_1@JSONKit的接口中还可以自行定制序列化和反序列化选项

JSONKit 使用示例

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