我如何排序在它NSNumbers一个NSMutable阵列？ [英] How Do I sort an NSMutable Array with NSNumbers in it?

问题描述

我试图做一个高评分表，并在目标C（实际上，在总体目标C是我的挑战）阵列吸，所以我无法弄清楚如何排序。我试图做这样的事情（sp​​eudo code，我写这篇文章的动作风格，因为我更舒服）：

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)

但我不出来...我已经看到它的其他线程，但其使用的plist文件和材料，我不知道够不够目标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

您想做到这一点的一小段路？

Would you like to do that the short way?

如果您有的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]];

尼斯和容易：）

您还可以执行与不变阵列描述相似排序，但你最终将一份副本，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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