iOS 汉字转拼音

NSMutableString *ms = [[NSMutableString alloc] initWithString:@"我是中国人"];        if (CFStringTransform((__bridge CFMutableStringRef)ms, 0, kCFStringTransformMandarinLatin, NO)) {            NSLog(@"Pingying: %@", ms); // wǒ shì zhōng guó rén 带声调        }        if (CFStringTransform((__bridge CFMutableStringRef)ms, 0, kCFStringTransformStripDiacritics, NO)) {            NSLog(@"Pingying: %@", ms); // wo shi zhong guo ren 不带声调        }