iOS 利用collectionView代码布局实现搜索历史，UISearchBar搜索框

àì夳堔傛蜴生んèń 2022-12-23 06:53 598阅读 0赞

效果如下：  
![搜索功能][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NtaWxlS0g_size_16_color_FFFFFF_t_70_pic_center]  
控制器代码如下：

#import "HBSearchHeaderTitleView.h"
    #import "HBSearchHistoryWordCell.h"
    #import "HBSearchHotWordCell.h"
    #import "UICollectionViewLeftAlignedLayout.h"
    @interface HBSearchViewController ()<UISearchBarDelegate,UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>
    @property (nonatomic ,strong)UIView *navView;
    @property (nonatomic ,strong)UISearchBar *searchBar;
    @property (nonatomic ,strong)UIButton *cancelBtn;//取消按钮
    @property (nonatomic ,strong)UICollectionView *collectionView;
    @property (nonatomic ,strong)NSMutableArray *historyWordsAry;//历史记录
    @property (nonatomic ,strong)NSArray *hotWordsAry;//热搜
    @end
    
    @implementation HBSearchViewController
    
    -(void)viewWillAppear:(BOOL)animated{
        [super viewWillAppear:animated];
        self.navigationController.navigationBar.hidden = YES;
    }
    -(void)viewWillDisappear:(BOOL)animated{
        [super viewWillDisappear:animated];
        self.navigationController.navigationBar.hidden = NO;
        //保存历史到本地
        if ([NSKeyedArchiver archiveRootObject:_historyWordsAry toFile:kSearchHistoryCachePath]) {
            NSLog(@"缓存搜索历史成功！！");
        }
    }
    //-(NSArray *)historyWordsAry{
    //    if (!_historyWordsAry) {
    //        _historyWordsAry = @[@"衣服",@"衣服",@"衣意思是酸辣粉",@"衣服",@"衣服"];
    //    }
    //    return _historyWordsAry;
    //}
    -(NSArray *)hotWordsAry{
        if (!_hotWordsAry) {
            _hotWordsAry = @[@"裤子",@"衣服",@"衣意思是酸辣粉衣意思是酸辣粉酸辣粉",@"衣服",@"衣意思是酸辣粉",@"衣服",@"衣意思是酸辣粉",@"衣服",@"衣意思是酸辣粉",@"衣服",@"衣意思是酸辣粉",@"衣服",@"衣意思是酸辣粉",@"衣服",@"衣意思是酸辣粉",@"衣服",@"衣意思是酸辣粉",@"衣服衣",@"衣意思是酸辣粉",@"衣服"];
        }
        return _hotWordsAry;
    }
    #pragma mark ==========点击取消按钮==========
    -(void)clickCancelBtn:(UIButton *)btn{
        [self.searchBar resignFirstResponder];
        [self.navigationController popViewControllerAnimated:YES];
    }
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
        self.view.backgroundColor = [UIColor whiteColor];
        self.title = @"搜索";
        self.historyWordsAry = [NSMutableArray array];
        _historyWordsAry = [[NSKeyedUnarchiver unarchiveObjectWithFile:kSearchHistoryCachePath] mutableCopy];
        if (_historyWordsAry == nil) _historyWordsAry = [NSMutableArray arrayWithCapacity:1];
        //添加子视图
        [self addSubViewUI];
    }
    #pragma mark ==========添加子视图==========
    -(void)addSubViewUI{
        [self.view addSubview:self.navView];
        [self.navView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.left.right.equalTo(self.view);
            make.height.mas_equalTo(NAVIBAR_HEIGHT);
        }];
        
        CGFloat btnWidth = 40;
        CGFloat searchHeight = 40;
        [self.navView addSubview:self.searchBar];
        [self.searchBar mas_makeConstraints:^(MASConstraintMaker *make) {
            make.bottom.equalTo(self.navView).offset(-10);
            make.left.equalTo(self.navView).offset(15);
            make.right.equalTo(self.navView).offset(-10-15-btnWidth);
            make.height.mas_equalTo(searchHeight);
        }];
        
        [self.navView addSubview:self.cancelBtn];
        [self.cancelBtn mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(self.searchBar);
            make.left.equalTo(self.searchBar.mas_right).offset(10);
            make.size.mas_equalTo(CGSizeMake(btnWidth, btnWidth));
        }];
        
        [self.view addSubview:self.collectionView];
        [self.collectionView reloadData];
        [self.searchBar becomeFirstResponder];
    }
    #pragma mark - UICollectionView
    - (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
    {
        if (kind == UICollectionElementKindSectionHeader) {
            HBSearchHeaderTitleView *header = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:CELLID([HBSearchHeaderTitleView class]) forIndexPath:indexPath];
            WEAKSELF;
            if (indexPath.section == 0) {
    //            header.delBtn.hidden = NO;
                header.titleLabel.text = @"历史搜索";
                header.backgroundColor = [UIColor whiteColor];
    //            [header.delBtn bk_addEventHandler:^(id sender) {
    //
    //                weakSelf.isDelHistory = !weakSelf.isDelHistory;
    //                [weakSelf.collectionView reloadSections:[NSIndexSet indexSetWithIndex:0]];
    //            } forControlEvents:UIControlEventTouchUpInside];
            } else {
                header.titleLabel.text = @"大家都在搜";
    //            header.delBtn.hidden = YES;
            }
            return header;
        }
        return nil;
    }
    #pragma mark-表头尺寸
    - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section{
        return CGSizeMake(SCREEN_WIDTH, 40);
    }
    - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
    {
        if (section == 0) {
            return self.historyWordsAry.count;
        }
        return self.hotWordsAry.count;
    }
    
    - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
    {
        return 2;
    }
    
    - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
        if (indexPath.section == 0) {
            WEAKSELF;
            HBSearchHistoryWordCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CELLID([HBSearchHistoryWordCell class]) forIndexPath:indexPath];
    //        cell.delBtn.hidden = !self.isDelHistory;
            NSString *text = self.historyWordsAry[indexPath.row];
            cell.titleLabel.text = text;
    //        [cell.delBtn bk_addEventHandler:^(id sender) {
    //
    //            [weakSelf.historyWordsAry removeObject:text];
    //            [weakSelf.collectionView reloadSections:[NSIndexSet indexSetWithIndex:0]];
    //        } forControlEvents:UIControlEventTouchUpInside];
            
            return cell;
        } else {
            HBSearchHotWordCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CELLID([HBSearchHotWordCell class]) forIndexPath:indexPath];
            cell.titleLabel.text = self.hotWordsAry[indexPath.row];
            return cell;
        }
    }
    
    - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
        
        NSString *searchText = @"";
        if (indexPath.section == 0) {
            //热词
            searchText = self.historyWordsAry[indexPath.row];
        }else if (indexPath.section == 1) {
            //热词
            searchText = self.hotWordsAry[indexPath.row];
        }
        _searchBar.text = searchText;
        [self searchGoods];
    }
    - (void)searchGoods{
        NSString *search = _searchBar.text;
        if (search.length == 0) {
    //        [NSObject showToastWithText:];
            //@"请输入搜索的商品名称"
            return;
        }
        
        //隐藏键盘
        [self.view endEditing:YES];
        
    //    self.searchText = search.removeAllSpace;
        if (![_historyWordsAry containsObject:search]) [_historyWordsAry addObject:search];
        
    //    kDefineWeakSelf;
    //    [YXShoppingService searchGoodsWithName:_searchText pageNum:_page sort:_sort order:_order success:^(YXShoppingSearchGoodsListModel *obj) {
    //
    //        weakSelf.listModel = obj;
    //        weakSelf.collectionView.hidden = YES;
    //        weakSelf.tableView.hidden = NO;
    //
    //        if (obj.list.count == 0) {
    //            //没数据
    //            weakSelf.isShowEmptyView = YES;
    //            weakSelf.tintImgName = @"yx_yhq_wu-ss";
    //            weakSelf.tintStr = @"还没有数据哦~~";
    //        }
    //
    //        [weakSelf.tableView reloadData];
    //    } fail:^(NSString *str) {
    //
    //        weakSelf.collectionView.hidden = YES;
    //        weakSelf.tableView.hidden = NO;
    //        //没数据
    //        weakSelf.isShowEmptyView = YES;
    //        weakSelf.tintStr = str; //@"网络请求失败，请重试";
    //        [weakSelf.tableView reloadData];
    //    }];
    }
    
    - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
        if (indexPath.section == 0) {
            NSString *text = self.historyWordsAry[indexPath.row];
            return [HBSearchHistoryWordCell getSizeWithText:text];
        } else {
            NSString *text = self.hotWordsAry[indexPath.row];
            return [HBSearchHistoryWordCell getSizeWithText:text];
        }
    }
    - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
        return UIEdgeInsetsMake(0, 15, 0, 0);
    }
    #pragma mark - UISearchBar
    - (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
        [self searchGoods];
    }
    #pragma mark ==========getter==========
    -(UIView *)navView{
        if (!_navView) {
            _navView = ({
                UIView *view = [UIView new];//初始化控件
                view.backgroundColor = [UIColor whiteColor];
                view ;
            }) ;
        }
        return _navView ;
    }
    -(UISearchBar *)searchBar{
        if (!_searchBar) {
            _searchBar = ({
                UISearchBar *seBar = [[UISearchBar alloc]init];
                seBar.delegate = self;
                if (@available(iOS 13, *)) {
                    seBar.searchTextField.font = [UIFont systemFontOfSize:13];
                } else {
                    UITextField *textfield = [seBar valueForKey:@"_searchField"];
                    textfield.font = [UIFont systemFontOfSize:13];
                }
                //默认白色搜索框,多出的背景为灰色;UIBarStyleDefault 默认 UIBarStyleBlack背景为黑色
                seBar.barStyle = UIBarStyleDefault;
                //设置搜索框整体的风格为不显示背景,默认为Prominent显示
                seBar.searchBarStyle = UISearchBarStyleDefault;
                [seBar setBackgroundImage:[UIImage new]];
                [seBar setSearchFieldBackgroundImage:[UIImage imageNamed:@"yx_search_field_bg"] forState:UIControlStateNormal];
                seBar.placeholder = @"复制标题，搜隐藏优惠券拿返利";
                seBar;
            });
        }
        return _searchBar;
    }
    -(UIButton *)cancelBtn{
        if (!_cancelBtn) {
            _cancelBtn = ({
                //创建按钮
                UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
                //设置标题
                [button setTitle:@"取消" forState:UIControlStateNormal];
                //设置字体大小
                button.titleLabel.font = [UIFont systemFontOfSize:14];
                //设置title颜色
                [button setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
                //添加点击事件
                [button addTarget:self action:@selector(clickCancelBtn:) forControlEvents:UIControlEventTouchUpInside];
                
                button;
            });
        }
        return _cancelBtn;
    }
    #pragma mark -Getter
    -(UICollectionView *)collectionView{
        if (!_collectionView) {
            //创建 layout(此处创建的是流水布局)
            UICollectionViewLeftAlignedLayout *flowLayout = [[UICollectionViewLeftAlignedLayout alloc] init];
            flowLayout.headerReferenceSize = CGSizeMake(SCREEN_WIDTH, 30);
            flowLayout.minimumLineSpacing = 10;
            flowLayout.minimumInteritemSpacing = 10;
            _collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, NAVIBAR_HEIGHT, SCREEN_WIDTH, SCREEN_HEIGHT-NAVIBAR_HEIGHT) collectionViewLayout:flowLayout];
            _collectionView.backgroundColor = [UIColor whiteColor] ;
            _collectionView.delegate = self ;
            _collectionView.dataSource = self ;
            _collectionView.showsVerticalScrollIndicator = NO;
            _collectionView.showsHorizontalScrollIndicator = NO;
            
            //注册 item
            [_collectionView registerClass:[HBSearchHeaderTitleView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:CELLID([HBSearchHeaderTitleView class])];
            [_collectionView registerClass:[HBSearchHistoryWordCell class] forCellWithReuseIdentifier:CELLID([HBSearchHistoryWordCell class])];
            [_collectionView registerClass:[HBSearchHotWordCell class] forCellWithReuseIdentifier:CELLID([HBSearchHotWordCell class])];
    
        }
        return _collectionView ;
    }
    @end

demo地址：[HBSearchNavDemo][]

END.

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NtaWxlS0g_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/4fad63e89895488ab486c2c90559354a.png
[HBSearchNavDemo]: https://github.com/smileKH/HBSearchNavDemo.git