UISearchController使用

iOS8之前我们使用UISearchDisplayController做TableView的本地搜索

iOS8提供实现搜索功能的SDK：UISearchController（iOS8.0之后）、UISearchDisplayController（iOS8.0之前，iOS8.0之后不建议再使用）。

遵守UISearchResultsUpdating协议

1 @interface ZWRecommendationFocusViewController()<UISearchResultsUpdating>
2 @property (strong, nonatomic) NSArray *list;
3 @property (strong, nonatomic) NSMutableArray *searchList;
4 @property (strong, nonatomic)UISearchController *searchController;
5 @end
 1 -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
 2 {
 3     return (!self.searchController.active)?1:1;
 4 }
 5 
 6 -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 7 {
 8     return (!self.searchController.active)?self.list.count:self.searchList.count;
 9 }
10 
11 -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
12 {
13     ZWFocusList *list=(!self.searchController.active)?self.list[indexPath.row]:self.searchList[indexPath.row];
14     static NSString *identifier = @"cell";
15     ZWFocusListTableViewCell *cell = [ZWFocusListTableViewCell cellWithTableView:tableView identifier:identifier];
16     cell.list = list;
17     return cell;
18 }

 

 1 /**
 2  *  UISearchController作为UITableView的tableHeaderView
 3  */
 4 -(void)addSearchBar
 5 {
 6     //创建UISearchController对象
 7     UISearchController *searchController = [[UISearchController alloc]initWithSearchResultsController:nil];
 8     //是否添加半透明覆盖层。为YES，搜索时，背景会变暗（背景变模糊）。默认为YES
 9     searchController.dimsBackgroundDuringPresentation = NO;
10     //是否隐藏导航栏。为YES，搜索时，UINavigationBar会隐藏。默认为YES
11     searchController.hidesNavigationBarDuringPresentation = YES;
12     //NO表示UISearchController在present时，可以覆盖当前controller。默认为NO
13     searchController.definesPresentationContext = NO;
14     //搜索栏表头视图
15     self.tableView.tableHeaderView = searchController.searchBar;
16     
17     [searchController.searchBar sizeToFit];
18     searchController.searchResultsUpdater = self;
19     
20     searchController.searchBar.placeholder=@"请输入名称或者数字";
21     searchController.searchBar.autocapitalizationType=UITextAutocapitalizationTypeNone;
22     //    searchController.searchBar.showsCancelButton=YES;//显示取消按钮
23     //自适应
24     [searchController.searchBar sizeToFit];
25     //    searchController.searchBar.frame = CGRectMake(0, 0, 0, 44);
26     //    searchController.searchBar.prompt=@"请输入关键字";
27     self.searchController = searchController;
28 }

 

 1 - (void)updateSearchResultsForSearchController:(UISearchController *)searchController{
 2     NSString *searchString = self.searchController.searchBar.text;
 3     //NSPredicate 谓词
 4     NSPredicate *preicate = [NSPredicate predicateWithFormat:@"theme_name LIKE[c] %@", searchString];
 5     if (self.searchList!= nil) {
 6         [self.searchList removeAllObjects];
 7     }
 8     //过滤数据
 9     self.searchList= [NSMutableArray arrayWithArray:[self.list filteredArrayUsingPredicate:preicate]];
10     //刷新表格
11     [self.tableView reloadData];
12 }

 

posted @ 2016-07-08 15:19  阿水zev  阅读(2481)  评论(0)  编辑  收藏  举报