How to determine if an NSString is latin based?

问题:

I'm trying to determine if a string is latin based or Japanese.

I've tried something like the following but it returns YES for Japanese strings as well:

NSCharacterSet *alphaSet = [NSCharacterSet alphanumericCharacterSet]; BOOL isAlpha = [[myStr stringByTrimmingCharactersInSet:alphaSet] isEqualToString:@""]; 

A string might be a word like "café" or something like "カフェ" or "吃茶店".

回答1:

Use the canBeConvertedToEncoding: method. For example:

BOOL isLatin = [myString canBeConvertedToEncoding:NSISOLatin1StringEncoding]; 

Available encodings are here.

文章来源: How to determine if an NSString is latin based?