匹配NSDictionary键值对

Question

I have the following NSDictionary with the following data structure:

Food Count (values) - Food Name (key)

I sort that NSDictionary's food count like so:

    NSArray *sortedFood = [[detailDictionary allValues] sortedArrayUsingComparator:^(id obj1, id obj2) {
    if ([obj1 intValue] < [obj2 intValue])
        return (NSComparisonResult)NSOrderedDescending;
    if ([obj1 intValue] > [obj2 intValue])
        return (NSComparisonResult)NSOrderedAscending;
    return (NSComparisonResult)NSOrderedSame;
}];

It has sorted it the following way

100
98
50
30
etc.

I am trying to use that new sortedFood array to then only show the top 5 value, key pairs for the food.

For example, if Apple's is the name of the food that has the value of 100, it would appear first.

So far I have the loop, but nothing else.

for (int i = 0; i <= 5; i++) {
}

Not sure what else to do. I think this is more difficult because the whole dictionary isn't sorted in the same way as the new array, but I could be wrong.

Answer 1

我认为您应该在NSDictionary尝试-[keysSortedByValueUsingSelector:] ，它会按值排序并获得关键结果。