如何在 iPhone 上比较 A 和 Á [英] How to compare A to Á on the iPhone

问题描述

我需要比较 2 个字符串，只查看第一个字母.

I need to compare 2 strings, looking at the first letter only.

有没有一种方法可以将 A 与 Á 进行比较，并将其识别为 A，而无需 ´?

Is there a method to compare A to Á, and recognize it as A, without the ´?

推荐答案

NSString 具有不区分变音符号的比较模式，可以满足您的需求.

NSString has a diacritic-insensitive comparison mode which will do what you're after.

// should return NSOrderedSame, i.e. identical
[@"Apple" compare:@"Ápple" 
          options:NSDiacriticInsensitiveSearch]

如果您也希望它不区分大小写:

If you want it to be case-insensitive as well:

// ditto
[@"APPLE" compare:@"Ápple" 
          options:NSDiacriticInsensitiveSearch | NSCaseInsensitiveSearch] 

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