検索バーが最初のレスポンダになったときにテーブルを変更する - スウィフト

Question

こんにちは、検索バーが最初のレスポンダになったときにテーブルのセルを変更しようとしています。理想的には、友だちのリクエストを最初に表示する友だちテーブルを追加し、検索バーが最初のレスポンダになると、検索バーに入力されたものの検索結果を表示するようにセルを変更します。ここに私の現在のコードは次のとおりです。このため

class UserFriendRequestController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate { 

let titleCell = "titleCell" 
let cellId = "cellId" 
let contactSearch = "contactSearch" 
var searchBar = UISearchBar() 
var addFriendsTable: UITableView = UITableView() 
let users = NSMutableArray() 

override func viewDidLoad() { 
    super.viewDidLoad() 

    view.addSubview(addFriendsTable) 

    let img = UIImage(named: "white-screen") 
    self.navigationController?.navigationBar.shadowImage = img 
    self.navigationController?.navigationBar.setBackgroundImage(img, for: UIBarMetrics.default) 

    navigationItem.title = "Add Contact" 
    self.navigationController?.navigationBar.titleTextAttributes = [ NSFontAttributeName: UIFont(name: "Nunito", size: 18.5)!, NSForegroundColorAttributeName: UIColor(r: 86, g: 214, b: 209)] 

    addFriendsTable.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height - (70)) 
    addFriendsTable.delegate = self 
    addFriendsTable.dataSource = self 
    searchBar.sizeToFit() 
    searchBar.searchBarStyle = .minimal 
    searchBar.placeholder = "Search Conctacts" 
    searchBar.showsCancelButton = true 
    searchBar.delegate = self 
    addFriendsTable.tableHeaderView = searchBar 
    addFriendsTable.contentOffset = CGPoint(x: 0.0, y: 0.0) 

    UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self]).setTitleTextAttributes([NSFontAttributeName : UIFont(name: "Nunito", size: 15)!, NSForegroundColorAttributeName : UIColor(r: 78, g: 78, b: 78) 
     ], for: .normal) 

    var image = UIImage(named: "back_button_thick") 
    image = image?.withRenderingMode(UIImageRenderingMode.alwaysOriginal) 
    navigationItem.leftBarButtonItem = UIBarButtonItem(image: image, style: .plain, target: self, action: #selector(handleBack)) 

    addFriendsTable.register(UserFriendRequestsCell.self, forCellReuseIdentifier: cellId) 
    addFriendsTable.register(FriendRequestsTitleCell.self, forCellReuseIdentifier: titleCell) 
    addFriendsTable.register(AddFriendRequestCell.self, forCellReuseIdentifier: contactSearch) 
    addFriendsTable.separatorColor = UIColor(r: 225, g: 225, b: 225) 

    setup() 
} 

func setup() { 
    for i in 1 ..< 20 { 
     let user = User() 
     users.add(user) 
    } 
} 


func searchBarCancelButtonClicked(_ searchBar: UISearchBar) { 
    searchBar.text = nil 
    searchBar.resignFirstResponder() 
} 

func handleBack() { 
    dismiss(animated: true, completion: nil) 
} 


func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    return 10 
} 

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 

    if self.searchBar.isFirstResponder { 
     let cell = tableView.dequeueReusableCell(withIdentifier: contactSearch, for: indexPath) as! AddFriendRequestCell 
     cell.selectionStyle = UITableViewCellSelectionStyle.none 
     cell.textLabel?.text = "Instagram User Name" 
     cell.textLabel?.font = UIFont(name: "Nunito", size: 16) 
     cell.textLabel?.textColor = UIColor(r: 51, g: 51, b: 51) 
     cell.detailTextLabel?.text = "Instagram Handle" 
     cell.detailTextLabel?.font = UIFont(name: "Nunito", size: 13) 
     cell.detailTextLabel?.textColor = UIColor.darkGray 
     cell.profileImageView.image = UIImage(named: "profilepic") 
     cell.separatorInset.left = CGFloat(55) 
     cell.separatorInset.right = CGFloat(5) 
     let user = users[indexPath.row] as! User 
     cell.configure(user: user) 
     return cell 
    } else { 
     if indexPath.row == 0 { 

      let cell = tableView.dequeueReusableCell(withIdentifier: titleCell, for: indexPath) as! FriendRequestsTitleCell 
      cell.selectionStyle = UITableViewCellSelectionStyle.none 
      return cell 

     } else { 
      let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! UserFriendRequestsCell 
      cell.selectionStyle = UITableViewCellSelectionStyle.none 
      cell.textLabel?.text = "Instagram User Name" 
      cell.textLabel?.font = UIFont(name: "Nunito", size: 16) 
      cell.textLabel?.textColor = UIColor(r: 51, g: 51, b: 51) 
      cell.detailTextLabel?.text = "Instagram Handle" 
      cell.detailTextLabel?.font = UIFont(name: "Nunito", size: 13) 
      cell.detailTextLabel?.textColor = UIColor.darkGray 
      cell.profileImageView.image = UIImage(named: "profilepic") 
      cell.separatorInset.left = CGFloat(55) 
      cell.separatorInset.right = CGFloat(5) 

      return cell 
     } 
    } 
} 

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat{ 

    if self.searchBar.isFirstResponder { 
     return 55 
    } 

    else { 
     if indexPath.row == 0 { 
      return 30 
     } else { 
      return 55 
     } 
    } 
} 
} 

Answer 1

、私は特にsearchBarTextDidBeginEditing()とsearchBarTextDidEndEditing()、UISearchBarDelegateで他の方法を見てお勧めします。これらのデリゲートメソッドのそれぞれでは、[self.tableView reloadData]と呼んですべてのセルを更新できます。

さらに、FriendRequestsTitleCellを実装する別の方法は、使用しているセルがテーブルビューの上部に表示されるため、カスタムヘッダービューをテーブルビューに追加することです。