- (NSString *)getFirstString:(ICCustom *)custom {

    NSMutableString *source = [custom.merchantAbbreviation mutableCopy];
    if(source && custom.merchantAbbreviation.length>0)

    {

        CFRange range = CFRangeMake(0, 1);
        CFStringTransform((__bridge CFMutableStringRef)source, &range, kCFStringTransformMandarinLatin, NO);
        CFStringTransform((__bridge CFMutableStringRef)source, &range, kCFStringTransformStripDiacritics, NO);
        NSString *phonetic = source;
        phonetic = [phonetic substringToIndex:1];
        phonetic = [phonetic uppercaseString];
        int temp = [phonetic characterAtIndex:0];
        if (temp < 65 || temp > 122 || (temp > 90 && temp < 97)) {
            //不合法的title
            phonetic = @"#";
        }else{
            phonetic = phonetic;
        }
        return phonetic;
    }else
    {
        return @"#";
    }

}