将汉字转换为拼音截取拼音首字母根据字母排序

Posted 2023-02-28 PinkJoker

//将汉字转换成拼音

+ (NSString *)convertNameToCharactor:(NSString *)name

    //转成了可变字符串

    NSMutableString *str = [NSMutableString stringWithString:name];

    //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;

 

//截取拼音的首字母

+ (NSString *)extractFirstABCWithCharactor:(NSString *)name

   NSString * pinyin = [self convertNameToCharactor:name];

    if(pinyin.length > 0)

        return [pinyin substringWithRange:NSMakeRange(0, 1)];

   

    return nil;

    //排序，排序的根据是字母

    NSComparator cmptr = ^(id obj1, id obj2)

        if ([obj1 characterAtIndex:0] > [obj2 characterAtIndex:0])

            return (NSComparisonResult)NSOrderedDescending;

       

 

        if ([obj1 characterAtIndex:0] < [obj2 characterAtIndex:0])

            return (NSComparisonResult)NSOrderedAscending;

       

        return (NSComparisonResult)NSOrderedSame;

    ;

//letterArray 为首字母的数组

  self.letterArray = [[NSMutableArray alloc]initWithArray:[self.letterArray sortedArrayUsingComparator:cmptr]];