使用NSSortDescriptor对带有核心数据的内部版本号进行排序 [英] Using NSSortDescriptor to sort build numbers with Core Data

问题描述

我正在尝试将 NSSortDescriptor 与Core Data一起使用来对内部版本号/软件版本(NSStrings)进行排序.内部版本号实际上只是NSStrings，但这似乎很难.我猜是因为有多个不规则的小数点.

I'm trying to use NSSortDescriptor with Core Data to sort build numbers/software versions (NSStrings). The build numbers are actually just NSStrings but it seems to have a hard time with this. I'm guessing because of the multiple and irregular decimal points.

例如，我想对以下内容进行排序.

For example, I would like to sort the following.

1.7.6
1.8
1.6.2
1.9.0.1
2.0

每行代表一个 NSString .

我将如何正确执行此操作，或者还有其他尝试方法?

How would I do this properly or is there another way I should try?

推荐答案

使用 localizedStandardCompare:的排序描述符应产生预期的结果:

A sort descriptor using localizedStandardCompare: should produce the intended result:

[NSSortDescriptor sortDescriptorWithKey:@"buildNumber"
                              ascending:YES
                               selector:@selector(localizedStandardCompare:)];

localizedStandardCompare:是类似Finder"的比较，包含数字的字符串根据它们的数值排序.

localizedStandardCompare: is the "Finder-like" comparison and strings containing numbers are sorted according to their numerical value.

在 Swift中:

NSSortDescriptor(key: "buildNumber", ascending: true,
            selector: #selector(NSString.localizedStandardCompare))

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