ios SearchBar搜索功能（可实现输入字母搜索汉字）

准备工作：
1、首先引入UISearchBarDelegate代理
2、添加一个数组，存放搜索结果

//存放搜索结果的数组
@property(nonatomic,strong)NSMutableArray *resultArray;

-(NSMutableArray *)resultArray{

    if (!_resultArray) {
        _resultArray = [NSMutableArray array];
    }
    return _resultArray;
}

3、创建tableview

  //创建tableview
-(UItableView *)tableView{
    if(!_tableView)
    _tableView = [[UITableView alloc]initWithFrame:CGRectMake(frame.origin.x, frame.origin.y+64+55, frame.size.width,0)];
    _tableView.delegate = self;
    _tableView.dataSource = self;
    _tableView.backgroundColor = [UIColor whiteColor];
    _tableView.rowHeight = 44;
    _tableView.layer.cornerRadius = 5;
     _tableView.tableHeaderView = [self headView];
    _tableView.tableFooterView = [[UIView alloc]init];
}

4、创建UISearchBar作为tableview的头部

//UISearchBar作为tableview的头部
+(UIView *)headView{

   UISearchBar *searchBar = [[UISearchBar alloc]initWithFrame:CGRectMake(0, 64, 100, 44)];
    searchBar.keyboardType = UIKeyboardAppearanceDefault;
    searchBar.placeholder = @"请输入搜索关键字";
    searchBar.delegate = self;
    //底部的颜色
    searchBar.barTintColor = KGrayColor;
    searchBar.searchBarStyle = UISearchBarStyleDefault;
    searchBar.barStyle = UIBarStyleDefault;
    return searchBar;
}

5、实现UISearchBarDelegate的代理

//在搜索框中修改搜索内容时，自动触发下面的方法
-(BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar{
    return YES;
}

-(void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
    
    NSLog(@"开始输入搜索内容");
    searchBar.showsCancelButton = YES;//取消的字体颜色，
    [searchBar setShowsCancelButton:YES animated:YES];
    
    //改变取消的文本
    for(UIView *view in [[[searchBar subviews] objectAtIndex:0] subviews]) {
        if ([view isKindOfClass:[UIButton class]]) {
            UIButton *cancel =(UIButton *)view;
            [cancel setTitle:@"取消" forState:UIControlStateNormal];
            [cancel setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        }
    }
}

-(void)searchBarTextDidEndEditing:(UISearchBar *)searchBar{
    NSLog(@"输入搜索内容完毕");  
}

--->搜框中输入关键字进行搜索

//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);
    
    //需要事先情况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];
        });
    });
}

//取消的响应事件
-(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{
    
    NSLog(@"取消搜索");
    [searchBar setShowsCancelButton:NO animated:YES];
    [searchBar resignFirstResponder];
}

 //键盘上搜索事件的响应
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
    
    NSLog(@"搜索");
    [searchBar setShowsCancelButton:NO animated:YES];
    [searchBar resignFirstResponder];
}

!!!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;
}

tableView展示搜索内容

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    
    //把符合搜索条件的内容展示出来
   JXSChannelModel *model = self.resultArray[indexPath.row];
   cell.textLabel.text = model.ChannelName;
}

Demo下载地址：https://github.com/zhuchenglong/MySearchBarDemo

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