排序不正确 [英] Sorting is not working correctly

问题描述

我使用自定义命名通过"app1.format"，"file2.format"等通过我的应用程序将一些文件保存在文档目录中.稍后，我将这些文件提取到Array中并循环打印，然后将它们以排序形式出现，但当我存储"file10.format"等时出现问题.在此之后，结果是出乎意料的.保存第10个文件后，输出就像

I am saving some files in document directory through my app using custom naming as "file1.format" ,"file2.format" and so on.Later I fetch these files in an Array and printing them in a loop then they are coming in sorted form but the problem arises when I store "file10.format" and so on. After this the result comes is some what unexpected. As after saving 10th file the output comes like

file1.foramtfile10.formatfile2.format..file6.formatfile61.formatfile7.format我不知道为什么排序将所有1或2s放在一个地方，如上所示，而预计10应该排在9之后而不是1之后.我使用了各种排序方法，但是结果总是相同.

file1.foramt file10.format file2.format . . file6.format file61.format file7.format I don't know why sorting take all 1s or 2s on one place as shown above while it is expected that 10 should just comes after 9 not after 1.I used all kind of sorting but the result is coming same all time.

推荐答案

如果要像Finder一样"对文件名进行排序，请使用 localizedStandardCompare .特别是，字符串中的数字是根据其数字值排序的:

If you want to sort file names "as the Finder does", use localizedStandardCompare. In particular, numbers in the strings are sorted according to their numeric value:

NSArray *files = [NSArray arrayWithObjects:@"file10.format", @"file2.format", @"file1.format", nil];
NSArray *sorted = [files sortedArrayUsingSelector:@selector(localizedStandardCompare:)];
NSLog(@"%@", sorted);

输出:

2012-11-05 11:38:55.474 test77[533:403] (
    "file1.format",
    "file2.format",
    "file10.format"
)

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