将一个字典的值与另一个字典的键进行比较

Question

我有两本字典，如下所示：

Dictionary 1:
keyIdDict {
    "Feb 5, 2015" =     (
        607
    );
    "Nov 9, 2009" =     (
        431,
        433,
        435
 );
}

Dictionary 2:
rollImageDict {
    607 = "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009123.jpg";
    433 = "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009124.jpg";
    417 = "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009125.jpg";
    419 = "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009126.jpg";
    421 = "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009129.jpg";
    435 = "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009130.jpg";
}

我想用 "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009123.jpg"

替换第一个字典中的值，即 607

预期最终结果：

keyIdDict {
    "Feb 5, 2015" =     (
        "/Users/betteruse/Pictures/iPhoto Library.photolibrary/Masters/2014/10/21/20141021-160023/06122009123.jpg"
    );
}

有人可以帮我解决这个问题吗？

Answer 1

我没有mac写代码但是很简单，按照步骤来就行了

先遍历字典(Dictionary 1)，得到变量中的值

你会得到类似

的东西

607 //first iteration
431,433,435 // second iteration

然后再次拆分该值并再次迭代它。

所以现在，当您拆分和迭代时，您将获得 607 作为值，对每个值进行迭代。

每次迭代都从其他字典中获取值

完成..

Answer 2

我没有测试，但你可以试试这个代码

    NSMutableDictionary *newDic = [[NSMutableDictionary alloc] initWithCapacity:0];
    for (NSNumber *rollNum in rollImageDict) {
        for (NSString *str in keyIdDict) {
            NSMutableArray *temp = [[NSMutableArray alloc] initWithCapacity:0];
            for (NSNumber *keyNum in keyIdDict[str]) {
                if (rollNum == keyNum) {
                    [temp addObject:rollImageDict[rollNum]];
                }
            }
            newDic[str] = temp;
        }
    }

Answer 3

给你：

NSMutableDictionary *newDictionary = [NSMutableDictionary dictionary];
[keyIdDict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop){
    NSArray *array = [rollImageDict objectsForKeys:obj notFoundMarker:[NSNull null]];
    [newDictionary setObject:array forKey:key];
}];

将一个字典的值与另一个字典的键进行比较

Compare values of one dictionary to keys of another dictionary

macos

cocoa

objective-c

nsdictionary

nsmutabledictionary