ios下解析json字符串

在ios下解析json可以使用官方的库，下载地址https://github.com/johnezang/JSONKit

包里只有两个文件，jsonkit.h/jsonkit.m包含到类里面即可

//使用一个json字符串来作为被解析对象

NSString *jsonstring = @"[{\"age\":18,\"book\":{\"price\":23.2,\"title\":\"booooooook1\"},\"name\":\"samyou\"},{\"age\":22,\"book\":{\"price\":21,\"title\":\"booooooook2\"},\"name\":\"samsam\"}]";

//转换为nsdata为了模拟从http得到的json数据类型

NSData *data = [jsonstring   dataUsingEncoding:NSUTF8StringEncoding];

//如果json串最外层是jsonarray则用mutableObjectFromJSONData,返回NSArray，否则用objectFromJSONData，返回NSDictionary

NSArray *arr = (NSArray *)[data  mutableObjectFromJSONData];

NSLog(@"count=%d",arr.count);

for(int i=0;i<arr.count;i++)

{

NSDictionary *people = [arr   objectAtIndex:i];

NSString *name = [people   objectForKey:@"name"];

NSNumber *age = [people  objectForKey:@"age"];//NSDictionary不能存储基本数据类型，所以所有的基本数据类型都是通过NSNumber封装

NSLog(@"person withname=%@,age = %d",name,[age   intValue]);

NSDictionary *book = [people  objectForKey:@"book"];

NSString *bookname = [book  objectForKey:@"title"];

NSNumber *price = [book  objectForKey:@"price"];

NSLog(@"book with title=%@, price=%f",bookname,[price   doubleValue]);

}

哥的源代码下载地址

http://download.youkuaiyun.com/detail/samguoyi/4286190