tableView設置編輯menuController操作不起作用

Question

我有一個tableView和tableViewCell。我創建MenuController來設置TableView編輯。但它似乎失敗了。但我使用導航按鈕添加「testFunc」動作。它可以改變mutiselected編輯。我想念什麼？我已經添加了tableView的子視圖。我也遵循UITableViewDataSource，UITableViewDelegate。

protocol DelegateA { 
func testFunc() 
} 

class ViewController: UIViewController,DelegateA { 

lazy var tableView:UITableView = {()->UITableView in 
    let ui:UITableView = UITableView() 
    ui.delegate = self 
    ui.dataSource = self 
    ui.separatorStyle = .none 
    ui.backgroundColor = defaultBackgroundColor 
    return ui 
}() 

override func viewDidLoad() { 
    super.viewDidLoad() 

    self.tableView.allowsMultipleSelectionDuringEditing = true 
} 

func testFunc() { 

    print("123") //it print "123" successful 

    //not working 
    if(self.tableView.isEditing == false) { 
     self.tableView.setEditing(true, animated:true) 
    } 
    else { 
     self.tableView.setEditing(false, animated:true) 
    } 
} 

} 

這是對標籤定製tableViewCell

class UITalkContent:UILabel { 

var delegate:DelegateA? 

override init(frame: CGRect) { 
    super.init(frame:frame) 
    translatesAutoresizingMaskIntoConstraints = false 
    numberOfLines = 0 
    isUserInteractionEnabled = true 
    addGestureRecognizer(UILongPressGestureRecognizer(target: self, action: #selector(gestureLongPress))) 
} 

required init?(coder aDecoder: NSCoder) { 
    fatalError("init(coder:) has not been implemented") 
} 

override func drawText(in rect: CGRect) { 
    let insets: UIEdgeInsets = UIEdgeInsets(top: defaultContentPadding, left: defaultPadding, bottom: defaultContentPadding, right: defaultPadding) 
    super.drawText(in: UIEdgeInsetsInsetRect(rect, insets)) 
} 

func gestureLongPress(sender:UILongPressGestureRecognizer) { 

    if (sender.state == .ended) { 
     return 
    } 

    becomeFirstResponder() 


    let menu = UIMenuController.shared 


    menu.menuItems = [ 
     UIMenuItem(title: localString(string: "FORWARD"), action: #selector(forward)), 
    ] 


    menu.setTargetRect(bounds, in: self) 


    menu.setMenuVisible(true, animated: true) 
} 

func forward(menu :UIMenuController) { 
    print("321") //print "321" successfully 
    self.delegate = ViewController() 
    self.delegate?.testFunc() 

} 

override var canBecomeFirstResponder: Bool{ 
    return true 
} 

override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool { 
    if (action == #selector(UIResponderStandardEditActions.copy(_:)) || action == #selector(forward)) { 
     return true 
    } 
    return false 
} 

override func copy(_ sender: Any?) { 
    UIPasteboard.general.string = text 
} 
} 

2017年6月16日更新

class ContentTableViewCell: UITableViewCell { 

var labelContent:UILabel = {()->UILabel in 
    let ui:UILabel = UITalkContent() 
    ui.textColor = UIColor(red:0.20, green:0.20, blue:0.20, alpha:1.00) 
    ui.backgroundColor = UIColor.white 
    ui.font = defaultTextFont 
    ui.numberOfLines = 0 
    ui.lineBreakMode = NSLineBreakMode.byCharWrapping 
    ui.layer.cornerRadius = defaultButtonRadius 
    ui.layer.masksToBounds = true 
    ui.isHidden = false 
    return ui 
}() 

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) { 
    super.init(style: style, reuseIdentifier: reuseIdentifier) 
    loadContent() 
} 

required init?(coder aDecoder: NSCoder) { 
    super.init(coder: aDecoder) 
} 

override func layoutSubviews() { 
    super.layoutSubviews() 
    loadVFL() 
} 

func loadContent() { 
    contentView.addSubview(labelContent) 
} 

func loadVFL() { 
    labelContent.frame = CGRect(x: 0, y: 0, width: contentWidth, height: CGFloat.greatestFiniteMagnitude) 
    labelContent.sizeToFit() 

} 
} 

Answer 1

你想知道的是，其實不清楚，含糊不清是什麼。但我可以在這裏看到你正在做protocol-delegation以錯誤的方式。爲了使這個過程中的權利，請按照下列步驟操作：

1. 在發件人類創建一個協議，從那裏你想傳遞什麼信息（你的情況：UITalkContent）

   protocol MyProtocol { 
       func testFunc() 
   } 
   class UITalkContent: UILabel {...} 
   

2. 在發送端類添加delegateVAR爲：

   class UITalkContent: UILabel { 
       var delegate: MyProtocol? 
       ... 
       ... 
   } 
   

3. 使用此delegatevar來調用您在協議中指定的方法。這必須在您的發件人班級以及您準備發送任何消息時完成。在你的情況下，它的func forward(menu:)

   class UITalkContent: UILabel { 
       ... 
       ... 
       func forward(menu :UIMenuController) { 
        ... 
        ... 
        delegate.testFunc() 
       } 
       ... 
       ... 
   } 
   

4. 採用協議在recieving類（在你的情況：ViewController）

   class ViewController: UIViewController, MyProtocol { 
       ... 
       ... 
   } 
   

5. 實現協議的接收類中的方法。程序控制將在通知發生時傳輸到此處。

   class ViewController: UIViewController, MyProtocol { 
       ... 
       ... 
       func testFunc() { 
        // do what you want to do when program control reaches here 
       } 
       ... 
       ... 
   } 
   

6. 現在你必須設置接收類作爲該發件人類的delegate。爲此，您必須將self（接收類）分配給發件人類的實例。 （但我沒有看到你的UILabel的任何實例）

   class ViewController: UIViewController, MyProtocol { 
       ... 
       ... 
       `instance of UILabel` = self 
       ... 
       ... 
   }