@interface ZWRecommendationFocusViewController()<UISearchResultsUpdating>

 @property (strong, nonatomic) NSArray *list;

 @property (strong, nonatomic) NSMutableArray *searchList;

 @property (strong, nonatomic)UISearchController *searchController;

 @end

 -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

 {

     return (!self.searchController.active)?:;

 }

 -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

 {

     return (!self.searchController.active)?self.list.count:self.searchList.count;

 }

 -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

 {

     ZWFocusList *list=(!self.searchController.active)?self.list[indexPath.row]:self.searchList[indexPath.row];

     static NSString *identifier = @"cell";

     ZWFocusListTableViewCell *cell = [ZWFocusListTableViewCell cellWithTableView:tableView identifier:identifier];

     cell.list = list;

     return cell;

 }

 /**

  *  UISearchController作为UITableView的tableHeaderView

  */

 -(void)addSearchBar

 {

     //创建UISearchController对象

     UISearchController *searchController = [[UISearchController alloc]initWithSearchResultsController:nil];

     //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

     searchController.dimsBackgroundDuringPresentation = NO;

     //是否隐藏导航栏。为YES，搜索时，UINavigationBar会隐藏。默认为YES

     searchController.hidesNavigationBarDuringPresentation = YES;

     //NO表示UISearchController在present时，可以覆盖当前controller。默认为NO

     searchController.definesPresentationContext = NO;

     //搜索栏表头视图

     self.tableView.tableHeaderView = searchController.searchBar;

     [searchController.searchBar sizeToFit];

     searchController.searchResultsUpdater = self;

     searchController.searchBar.placeholder=@"请输入名称或者数字";

     searchController.searchBar.autocapitalizationType=UITextAutocapitalizationTypeNone;

     //    searchController.searchBar.showsCancelButton=YES;//显示取消按钮

     //自适应

     [searchController.searchBar sizeToFit];

     //    searchController.searchBar.frame = CGRectMake(0, 0, 0, 44);

     //    searchController.searchBar.prompt=@"请输入关键字";

     self.searchController = searchController;

 }

 - (void)updateSearchResultsForSearchController:(UISearchController *)searchController{

     NSString *searchString = self.searchController.searchBar.text;

     //NSPredicate 谓词

     NSPredicate *preicate = [NSPredicate predicateWithFormat:@"theme_name LIKE[c] %@", searchString];

     if (self.searchList!= nil) {

         [self.searchList removeAllObjects];

     }

     //过滤数据

     self.searchList= [NSMutableArray arrayWithArray:[self.list filteredArrayUsingPredicate:preicate]];

     //刷新表格

     [self.tableView reloadData];

 }