Ios 如何使搜索栏成为iPhone联系人应用程序或处理多个单词的搜索栏

我正在创建一个搜索栏，它的行为应该类似于iPhone联系人搜索栏。目前，它部分是这样做的。 这是我的密码

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
     NSRange whiteSpaceRange = [result rangeOfCharacterFromSet:[NSCharacterSet whitespaceCharacterSet]];
        if (whiteSpaceRange.location != NSNotFound)
        {
            NSString * stringAfterSpace = [result substringFromIndex:whiteSpaceRange.location];
            NSString * stringBeforeSpace= [result substringToIndex:whiteSpaceRange.location];

            NSPredicate *predicateForAfterSpace=[NSPredicate predicateWithFormat:@"catNm CONTAINS[cd] %@",stringAfterSpace];

            NSPredicate *predicateForBegining = [NSPredicate predicateWithFormat:@"catNm BEGINSWITH[cd] %@", stringBeforeSpace];

            NSPredicate *compoundPredicate = [NSCompoundPredicate andPredicateWithSubpredicates:@[predicateForBegining, predicateForAfterSpace]];
            searchArray = [[dataArray filteredArrayUsingPredicate:compoundPredicate] mutableCopy];

        }
        else
        {
            NSPredicate *predicateForBegining = [NSPredicate predicateWithFormat:@"catNm BEGINSWITH[cd] %@", result];

            NSString *stringAfterSpace=[NSString stringWithFormat:@" %@",result];
            NSPredicate *predicateForAfterSpace=[NSPredicate predicateWithFormat:@"catNm CONTAINS[cd] %@",stringAfterSpace];

            NSPredicate *compoundPredicate = [NSCompoundPredicate orPredicateWithSubpredicates:@[predicateForBegining,predicateForAfterSpace]];
            searchArray = [[dataArray filteredArrayUsingPredicate:compoundPredicate] mutableCopy];
        }
}

主要区别是我的搜索栏处理一个不完整的关键字，但不超过一个。假设

array={{catNm=@“Asus Zenfone 3 Max”}，{catNm=@“Asus Zenfone Go}}

如果搜索

asu zen

或

zen ma

则显示结果，但如果搜索

asu zen max

则出错

---

我想知道的是如何在搜索栏中处理多个空格，这里有一些你可以使用的东西：正则表达式（Regex）

我对regex不是很有信心，但这应该可以做到。如果你想添加更复杂的东西，可以使用在线RegexTools

结果/样本测试：

$>SearchString: "asus zen max"
Filtered: (
    "Asus Zenfone 3 Max"
)
$>SearchString: "zen ma"
Filtered: (
    "Asus Zenfone 3 Max"
)
$>SearchString: "asu zen"
Filtered: (
    "Asus Zenfone 3 Max",
    "Asus Zenfone Go"
)
$>SearchString: "zen"
Filtered: (
    "Asus Zenfone 3 Max",
    "Asus Zenfone Go"
)
$>SearchString: "M"
Filtered: (
    "Asus Zenfone 3 Max"
)
$>SearchString: "sams"
Filtered: NO RESULT
$>SearchString: "zen asu"
Filtered: NO RESULT
$>SearchString: "zen g"
Filtered: (
    "Asus Zenfone Go"
)
$>SearchString: "a   g"
Filtered: (
    "Asus Zenfone Go"
)

$>SearchString: "asus zen max"
Filtered: (
    "Asus Zenfone 3 Max"
)
$>SearchString: "zen ma"
Filtered: (
    "Asus Zenfone 3 Max"
)
$>SearchString: "asu zen"
Filtered: (
    "Asus Zenfone 3 Max",
    "Asus Zenfone Go"
)
$>SearchString: "zen"
Filtered: (
    "Asus Zenfone 3 Max",
    "Asus Zenfone Go"
)
$>SearchString: "M"
Filtered: (
    "Asus Zenfone 3 Max"
)
$>SearchString: "sams"
Filtered: NO RESULT
$>SearchString: "zen asu"
Filtered: NO RESULT
$>SearchString: "zen g"
Filtered: (
    "Asus Zenfone Go"
)
$>SearchString: "a   g"
Filtered: (
    "Asus Zenfone Go"
)