如何对包含 NSNumbers 的 NSMutable 数组进行排序? [英] How Do I sort an NSMutable Array with NSNumbers in it?

问题描述

我正在尝试制作一个高分表，并在目标 c 中使用数组(实际上，通常目标 c 对我来说具有挑战性)，所以我不知道如何排序.我正在尝试做这样的事情(伪代码，我用 actionscript 风格写这个，因为我对它更舒服):

I'm trying to make a high score table, and suck at arrays in objective c (actually, in general objective c is challenging for me), so I can't figure out how to sort. I'm trying to do something like this (speudocode, I'm writing this in actionscript style because I'm more comfortable with it):

highscores.addObjecttoArray(score)
highscores.sort(ascending)

但我想不通...我已经看到其他线程关于它，但他们使用 plist 文件和东西，我不知道足够的客观 c 向他们学习.

But I can't figure it out... I've seen other threads about it, but their use plist files and stuff and I don't know enough objective c to learn from them.

推荐答案

您想快速完成吗?

如果你有一个 NSNumber 实例的可变数组:

If you have a mutable array of NSNumber instances:

NSSortDescriptor *highestToLowest = [NSSortDescriptor sortDescriptorWithKey:@"self" ascending:NO];
[mutableArrayOfNumbers sortUsingDescriptors:[NSArray arrayWithObject:highestToLowest]];

又好又容易:)

您也可以对不可变数组使用描述符执行类似的排序，但最终会得到一个副本，而不是就地排序.

You can also perform similar sorting with descriptors on immutable arrays, but you will end up with a copy, instead of in-place sorting.

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