iOS开发

一、搜框中输入关键字的事件响应

-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{    NSLog(@"输入的关键字是---%@---%lu",searchText,(unsigned long)searchText.length);    //需要事先清空存放搜索结果的数组    [self.resultArray removeAllObjects];    //加个多线程，否则数量量大的时候，有明显的卡顿现象    //这里最好放在数据库里面再进行搜索，效率会更快一些    dispatch_queue_t globalQueue = dispatch_get_global_queue(0, 0);    dispatch_async(globalQueue, ^{        if (searchText!=nil && searchText.length>0) {            //遍历需要搜索的所有内容，其中self.dataArray为存放总数据的数组            for (DataModel *model in self.dataArray) {                NSString *tempStr = model.content;                //----------->把所有的搜索结果转成成拼音                NSString *pinyin = [self transformToPinyin:tempStr];                NSLog(@"pinyin--%@",pinyin);                if ([pinyin rangeOfString:searchText options:NSCaseInsensitiveSearch].length >0 ) {                    //把搜索结果存放self.resultArray数组                    [self.resultArray addObject:model];                }            }         }else{            self.resultArray = [NSMutableArray arrayWithArray:self.dataArray];        }        //回到主线程        dispatch_async(dispatch_get_main_queue(), ^{            [_tableView reloadData];        });    });}
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二、获取汉字转成拼音字符串 通讯录模糊搜索 支持拼音检索 首字母 全拼 汉字 搜索

- (NSString *)transformToPinyin:(NSString *)aString{    //转成了可变字符串    NSMutableString *str = [NSMutableString stringWithString:aString];    CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformMandarinLatin,NO);    //再转换为不带声调的拼音    CFStringTransform((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:@"#"];                //区分第几个字母            }            [allString appendFormat:@"%@",pinyinArray[i]];        }        [allString appendString:@","];        count ++;    }    NSMutableString *initialStr = [NSMutableString new];    //拼音首字母    for (NSString *s in pinyinArray)    {        if (s.length > 0)        {            [initialStr appendString:  [s substringToIndex:1]];        }    }    [allString appendFormat:@"#%@",initialStr];    [allString appendFormat:@",#%@",aString];    return allString;}
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