如何獲取漢字拼音首字母？一般用於通訊錄

- (NSString *)firstCharactor:(NSString *)aString

{

    //轉成了可變字串

    NSMutableString *str = [NSMutableString stringWithString:aString];

    //先轉換為帶聲調的拼音

    CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformMandarinLatin,NO);

    //再轉換為不帶聲調的拼音

    CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformStripDiacritics,NO);

    //轉化為大寫拼音

    NSString *pinYin = [str capitalizedString];

    //獲取並返回首字母

    return [pinYin substringToIndex:1];

}