NSString encoding conversion

i have a problem with this particular NSString B and Ｂ . As you can see the encoding is different. So I am wondering if there is any 开发者_高级运维way to convert Ｂ to B so that the computer can standardize the character.

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Does this work?

NSString *newString = [oldString stringByReplacingOccurrencesOfString:@"Ｂ" withString: @"B"];