//获取拼音首字母(传入汉字字符串, 返回大写拼音首字母) - (NSString *)firstCharactor:(NSString *)aString { //转成了可变字符串 NSMutableString *str = [NSMutableString stringWithString:aString]; //先转换为带声调的拼音  CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformMandarinLatin,NO); //再转换为不带声调的拼音  CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformStripDiacritics,NO); //转化为大写拼音 NSString *pinYin = [str capitalizedString]; //获取并返回首字母 return [pinYin substringToIndex:1]; }