NSTokenField不显示建议弹出窗口

Question

我使用了一个NSTokenField，但是在指定的延迟之后，它不会显示带有建议的小狗

我试过这样做：

class ViewController: NSViewController 
{ @IBOutlet weak var tokenFiled: NSTokenField!

  override func viewDidLoad()
  { super.viewDidLoad()

    tokenFiled.delegate = self
    tokenFiled.tokenStyle = .default
    tokenFiled.completionDelay = 0.25  
  }

  override var representedObject: Any? 
  { didSet { } }
}

extension ViewController:  NSTokenFieldDelegate, NSTokenFieldCellDelegate
{
  func tokenFieldCell(_ tokenFieldCell: NSTokenFieldCell, completionsForSubstring substring: String, indexOfToken tokenIndex: Int, indexOfSelectedItem selectedIndex: UnsafeMutablePointer<Int>) -> [Any]
  {
    let names = ["Name1", "Name 2", "Name3"]
    return names
  }
}

有什么想法吗，我哪里做错了？

Answer 1

明白了,

我使用了错误的委托方法。

func tokenFieldCell(_ tokenFieldCell: NSTokenFieldCell, completionsForSubstring substring: String, indexOfToken tokenIndex: Int, indexOfSelectedItem selectedIndex: UnsafeMutablePointer<Int>) -> [Any]

而不是：

func tokenField(_ tokenField: NSTokenField, completionsForSubstring substring: String, indexOfToken tokenIndex: Int, indexOfSelectedItem selectedIndex: UnsafeMutablePointer<Int>?) -> [Any]? 

现在运行得很好