IOS笔记Json解析

新版SDK自身提供Json解析库，为了向下兼容很多程序仍会采用其他类库来解析，以下就是用JSONKit解析的例子

    NSLog(@"打印测试");

    NSString *jsonstring =@"[{\"age\":18,\"book\":{\"price\":23.2,\"title\":\"boook111\"},\"name\":\"samyou\"},{\"age\":22,\"book\":{\"price\":33,\"title\":\"booook222\"},\"name\":\"samsam\"}]";

    NSData *data=[jsonstring dataUsingEncoding:NSUTF8StringEncoding];

    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"];

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

        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]);

    }