Question

我无法找到解决此问题的最新信息。如何在编辑NSTextField？

时监控箭头键按下之类的内容

从我抬起头来看： - 未调用NSControlTextEditingDelegate函数（我不知道如何使用它们） - NSTextFieldDelegate函数不会列出可在此处运行的内容

Answer 1

设置文本字段的委托：

textField.delegate = self

为协议添加以下继承：

class MyTextField : NSTextFieldDelegate, NSControlTextEditingDelegate { ...

并实施以下内容：

   func control(_ control: NSControl, textView: NSTextView, doCommandBy commandSelector: Selector) -> Bool {
    if commandSelector == #selector(moveUp(_:)) {
        ...
    } else if commandSelector == #selector(moveDown(_:)) {
        ...
    } else if commandSelector == #selector(insertNewline(_:)) {
        ...
    }
    return true
}

此链接Recognize if user has pressed arrow key while editing NSTextField swift

中有更多深入解释

Answer 2

keyDown doesn't seem to work with NSTextFields (it does for NSTextView)，所以我在我这边做的是子类NSTextField或ViewController并添加以下方法：

import Cocoa

class MyTextField: NSTextField
{    
    override func keyUp(with event: NSEvent) {
        print("MyTextField keyUp key is %ld", event.keyCode)

        super.keyUp(with: event)            
    }
}

class MyTextView: NSTextView
{
    override func keyDown(with event: NSEvent) {

        print("MyTextView keyDown key is %ld", event.keyCode)

        super.keyDown(with: event)
    }    
}

class ViewController: NSViewController {

    override func keyUp(with event: NSEvent) {
        print("ViewController keyUp key is %ld", event.keyCode)

        super.keyUp(with: event)
    }
}

编辑NSTextField时检测箭头/输入键

2 个答案: