iOS开篇——UI之UITableView的搜索

把tableView的头视图 设置为一个searchBar

创建一个新的数组  用来存储搜索到的信息

    _searchBar = [[UISearchBar alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 50)];
    _searchDC = [[UISearchDisplayController alloc]initWithSearchBar:_searchBar contentsController:self];
    
    
    _searchDC.searchResultsDelegate = self;
    _searchDC.searchResultsDataSource = self;
    
    _tableView.tableHeaderView = _searchBar;

在返回cell数量的代理方法中

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    
    if (tableView == _tableView) {
        return _dataArray.count;
    }
    
    if (_searchArray == nil) {
        _searchArray = [[NSMutableArray alloc]init];
    }else{
        [_searchArray removeAllObjects];
    }
    
    for (NSDictionary * dic in _dataArray) {
        NSRange range = [dic[@"name"] rangeOfString:_searchBar.text];
        if (range.length) {
            [_searchArray addObject:dic];
        }
    }
    
    return _searchArray.count;
}