将NSStepper与NSTextField集成

import Cocoa

class ViewController: NSViewController {

    @IBOutlet weak var stepper: NSStepper!
    @IBOutlet weak var textField: NSTextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        stepper.target = textField
        stepper.action = #selector(stepperValueChanged)
    }
    
    @objc func stepperValueChanged(sender: NSStepper) {
        let value = sender.integerValue
        textField.stringValue = String(value)
    }
}