ios - 将 NSArray 转换为 NSDictionary

Question

我想将一个 nsarray 转换为我正在使用的 nsdictionary

- (NSDictionary *) indexKeyedDictionaryFromArray:(NSArray *)array
{
    id objectInstance;
    NSUInteger indexKey = 0;

    NSMutableDictionary *mutableDictionary = [[NSMutableDictionary alloc] init];
    for (objectInstance in array)
        [mutableDictionary setObject:objectInstance forKey:[NSNumber numberWithUnsignedInt:indexKey++]];

    return (NSDictionary *)[mutableDictionary autorelease];
}

输出结果为:

{
    0 =     {
        Event = "";
        ID = 1;    };
    3 =     {
        Event = "";
        ID = 77;    };
    2 =     {
        Event = "";
        ID = 23;    };
    1 =     {
        Event = "";
        ID = 45;    };
    7 =     {
        Event = "";
        ID = 10;    };
    5 =     {
        Event = "";
        ID = 26;    };
    6 =     {
Event = "";
        ID = 27;
    };
    8 =     {
Event = "";
        ID = 28;
    };
}

转换为nsdictionary后，nsdictionary的顺序与原来的顺序不符，我想在nsarray中显示相同的顺序，我不知道如何？你能帮帮我吗？

Answer 1

NSDictionary 没有顺序。对键进行排序并使用它们来访问条目。