以无序形式获取字典键和值

Question

NSData* myData = [NSData dataWithBytes:&pEvent length:sizeof(pEvent)];
    wTimerId = 99;

    [m_cAppIdMap setObject:myData forKey:[NSNumber numberWithUnsignedShort:wTimerId]];
    wTimerId = 96;
    [m_cAppIdMap setObject:myData forKey:[NSNumber numberWithUnsignedShort:wTimerId]];
    wTimerId = 97;
    [m_cAppIdMap setObject:myData forKey:[NSNumber numberWithUnsignedShort:wTimerId]];
    wTimerId = 98;
    [m_cAppIdMap setObject:myData forKey:[NSNumber numberWithUnsignedShort:wTimerId]];
    wTimerId = 95;
    [m_cAppIdMap setObject:myData forKey:[NSNumber numberWithUnsignedShort:wTimerId]];

我使用键值99,96,97,98,95存储数据。但它存储为

{
    98 = <b0c71000 01000000>;
    97 = <b0c71000 01000000>;
    96 = <b0c71000 01000000>;
    99 = <b0c71000 01000000>;
    95 = <b0c71000 01000000>;
}

为什么会这样。有没有办法以先存储的方式排列字典。

Answer 1

词典本质上是无序的。如果您想订购，请使用数组。

如果您想同时进行基于订单和基于密钥的查找，请同时存储数组和字典;一个保存顺序，另一个保存基于密钥的查找。

让他们保持同步。