排序NSDictionary [英] Sort NSDictionary

问题描述

我得到了 NSDictionary ，它们与:

Key -> Value:
@"home" -> @"blue"
@"family" -> @"green"
@"work" -> @"red"

已更新

互联网说没有人可以对NSDictionary进行排序:c

Internet said no one can sort NSDictionary :c

这段代码帮助我实现了价值观.

This code helped me with values.

sortedArray = [anArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];

但是我失去了键和值之间的关系.如果有人可以编写函数，该函数采用NSDictionary并生成两个NSArray，它们相互关联，并且其中一个数组按NSDictionary的值排序，如下所示:

But i lose relation between keys and values. If anybody can write function, which take NSDictionary and make two NSArray, which related and one of those arrays sorted by values of NSDictionary like this:

(unsorted)
    Key -> Value:
    @"work" -> @"red"
    @"home" -> @"blue"
    @"family" -> @"green"

转换为:

Arrays, which keep relationship by index of item and one of them (values of NSDictionary) sorted

    ArrayOfKeys = {@"home",@"family",@"work"}
    ArrayOfValues = {@"blue", @"green", @"red"} -- this one sorted like alphabet

推荐答案

您可以使用keysSortedByValueUsingComparator，keysSortedByValueWithOptions或keysSortedByValueUsingSelector之类的方法以排序顺序访问键.但是根据定义，NSDictionary本身没有概念或顺序.

You can access the keys in a sorted order with method like keysSortedByValueUsingComparator, keysSortedByValueWithOptions or keysSortedByValueUsingSelector. But by definition a NSDictionary itself has no notion or order.

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