使用另一个NSArray作为指导对NSArray进行排序 [英] Sorting an NSArray using another NSArray as a guide

问题描述

因此，假设您有几个数组，颜色和形状，如下所示:

So, imagine you have a couple of arrays, Colors and Shapes, like this:

Colors: {
Yellow,
Blue,
Red
}

Shapes: {
Square,
Circle,
Diamond
}

现在，如果我想按字母顺序对颜色进行排序，则可以执行以下操作:

Now, if I want to sort Colors into alphabetical order I can do something like this:

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:nil ascending:YES selector:@selector(localizedCompare:)]; 
NSArray *sortedColors = [colors sortedArrayUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];
[sortDescriptor release];

但是我如何将形状按与重新排序颜色相同的顺序进行排序.我不是说按形状按字母顺序-我是按形状按颜色字母顺序...?

But how would I sort the Shapes into the same order that I re-ordered Colors. I don't mean put Shapes into alphabetical order - I mean put Shapes into Colors' alphabetical order...?

推荐答案

最简单的方法可能是这样:

Easiest way is probably this:

 NSDictionary *dict = [NSDictionary dictionaryWithObjects:colors forKeys:shapes];
 NSArray *sortedShapes = [dict keysSortedByValueUsingSelector:@selector(localizedCompare:)];

这篇关于使用另一个NSArray作为指导对NSArray进行排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！