NSDictionary(key与value)

1.key与value关系,用一个key的值控制整个模型 

 NSDictionary *dic = @{@"channelKey":channelModel,@"channelIndexKey":[NSString stringWithFormat:@"%ld",i],channelModel.channelId:columnList };

key是@“channelKey”,value对应的是一个模型channelModel存储所有的栏目,

key是@“channelIndexKey”,value对应的是频道的索引.

key是channelModel.channelId 频道id ,value对应的是所有栏目的模型

 2.NSDictionary *dic =@{@"你好",@"name"};

key 是name, value @"你好"

结果:

{

    5976 =     (

        "<WJNewsChannelModel: 0x170462400>",

        "<WJNewsChannelModel: 0x170462300>",

    );

    channelIndexKey = 1;

    channelKey = "<WJNewsChannelModel: 0x1742680c0>";

}