iOS search (can be implemented with fuzzy search support Pinyin retrieval first letter, etc.)

first, the event response to enter a keyword in the search box

-(void) Searchbar: (Uisearchbar *) Searchbar textdidchange: (NSString *) searchtext{NSLog (@ "The keyword entered is---%@---%lu",

    SearchText, (unsigned long) searchtext.length);

    An array of search results needs to be emptied beforehand [self.resultarray removeallobjects]; Add more than a thread, otherwise a large amount of time, there are obvious cotton phenomenon//the best place in the database to search again, efficiency will be faster some dispatch_queue_t globalqueue = dispatch_get_global_queue (0,
    0); Dispatch_async (Globalqueue, ^{if (Searchtext!=nil && searchtext.length>0) {//traverse all content that needs to be searched, Where Self.dataarray is the array for storing the total data for (Datamodel *model in Self.dataarray) {NSString *TEMPSTR = model
                . Content;
                -----------> Turn all search results into pinyin nsstring *pinyin = [self transformtopinyin:tempstr];

                NSLog (@ "pinyin--%@", pinyin); if ([Pinyin rangeofstring:searchtext options:nscaseinsensitivesearch].length >0) {//Store search results SELF.R
                Esultarray array [Self.resultarray Addobject:model];
 }           }}else{self.resultarray = [Nsmutablearray ArrayWithArray:self.dataArray];
        //back to main thread Dispatch_async (Dispatch_get_main_queue (), ^{[_tableview reloaddata];
    });
}); }

Second, get Chinese characters into phonetic strings Address Book fuzzy search support Pinyin retrieval first-letter spelling Chinese search

-(NSString *) Transformtopinyin: (NSString *) astring {//converted to variable string nsmutablestring *str = [nsmutablestring stringwit
    Hstring:astring];

    Cfstringtransform ((cfmutablestringref) str,null, kcfstringtransformmandarinlatin,no);
    Convert to phonetic cfstringtransform with no tones ((cfmutablestringref) str,null, kcfstringtransformstripdiacritics,no);
    Nsarray *pinyinarray = [str componentsseparatedbystring:@ "];

    nsmutablestring *allstring = [nsmutablestring new];

    int count = 0;
            for (int i = 0; i < Pinyinarray.count. i++) {for (int i = 0; i < pinyinarray.count;i++) {
                if (i = = count) {[Allstring appendstring:@ "#"];
        Distinguish the first few letters [allstring appendformat:@ "%@", Pinyinarray[i]];
        } [allstring appendstring:@ ","];
    Count + +;
    } nsmutablestring *initialstr = [nsmutablestring new];
      Phonetic initials for (NSString *s in Pinyinarray) {if (s.length > 0)  {[Initialstr appendstring: [s substringtoindex:1]];
    } [allstring appendformat:@ "#%@", initialstr];
    [Allstring appendformat:@ ", #%@", astring];
return allstring; }