objective-c - 获取多维字典的所有键

Question

我有一本像这样的字典:

{
dataTypes =     (
            {
        dataType = "datatype1";
        editable = 1;
        maxValue = 300;
        minValue = 0;
        order = 1;
        title = "Title 1";
        type = numeric;
        units = kg;
    },
            {
        dataType = "datatype 2";
        editable = 1;
        maxValue = 300;
        minValue = 0;
        order = 2;
        title = "title2";
        type = numeric;
        units = gm;
    },
            {
        dataType = "datatype3";
        editable = 1;
        maxValue = 300;
        minValue = 20;
        order = 3;
        title = "title3";
        type = numeric;
        units = kg;
    }
);
name = "Name";
order = 1
title = "Title";
}

我想获取这个字典中的所有键。

我尝试了 [myDict allKeys]，但是这只返回了四个键:DataTypes、name、order，标题。

我想检索所有键:dataType、editable、maxvalue 等。

Answer 1

试试这个。

NSArray *tempArray = [myDict objectForKey:@"dataTypes"];

NSDictionary *tempDictionary = (NSDictionary *)tempArray[0];

[tempDictionary allKeys] 将有你想要的。

写这个方法。

- (NSDictionary *)dictionaryFromArrayWithinDictionary:(NSDictionary *)dictionary withKey:(NSString *)key{
    NSArray *tempArray = [dictionary objectForKey:key];
    return (NSDictionary *)tempArray[0]; 
}

这将返回内部字典，只需对该字典调用“allKeys”，您将获得所需的所有键。