ios - 当 searchBar 文本高于 0 时删除单元格

Question

我创建了一个 tableView，我首先将其设置为如果 searchController 处于事件状态，它应该使用过滤后的数组。但是，当 searchBar 包含超过 0 个字符时，我想首先执行它。但是，这似乎不起作用。这是我到目前为止在 cellForRowAtIndexPath 中所做的

    if (count(self.teamSearchController.searchBar.text) > 0) {
        team = filteredTableData[indexPath.row] as Team
        cell.textLabel?.text = team.name as String

    } else {
        team = self.teamArray[indexPath.row] as Team
        cell.textLabel?.font = UIFont(name: "HelveticaNeue-Light", size: 20)
        cell.textLabel?.text = team.name as String

    }

updateSearchResultsForSearchController

func updateSearchResultsForSearchController(searchController: UISearchController)
{



    filteredTableData.removeAll(keepCapacity: false)

    let searchPredicate = NSPredicate(format: "name CONTAINS[c] %@ OR shortname CONTAINS[c] %@", searchController.searchBar.text, searchController.searchBar.text)
    let array = (teamArray as NSArray).filteredArrayUsingPredicate(searchPredicate) as! [Team]
    filteredTableData = array

    self.tableView.reloadData()
}

Answer 1

您应该在 updateSearchResultsForSearchController 中检查搜索文本的长度

func updateSearchResultsForSearchController(searchController: UISearchController)
{

    if searchController.searchBar.text == "" {
        filteredTableData = self.teamArray      
    } else {
        filteredTableData.removeAll(keepCapacity: false)

        let searchPredicate = NSPredicate(format: "name CONTAINS[c] %@ OR shortname CONTAINS[c] %@", searchController.searchBar.text, searchController.searchBar.text)

        let array = (teamArray as NSArray).filteredArrayUsingPredicate(searchPredicate) as! [Team]
        filteredTableData = array
    }
    self.tableView.reloadData()
}

更新 cellForRowAtIndexPath 中的代码，如下所示，只需检查 searchController 是否处于事件状态

if (self.teamSearchController.active) {
    team = filteredTableData[indexPath.row] as Team

} else {
    team = self.teamArray[indexPath.row] as Team
    cell.textLabel?.font = UIFont(name: "HelveticaNeue-Light", size: 20)
}
cell.textLabel?.text = team.name as String