将NSbutton连接到从Xib加载NSView的方法的代码

import Cocoa

class ViewController: NSViewController {
    @IBOutlet weak var button: NSButton!
    var customView: NSView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // 加载Xib文件中的NSView
        let nib = NSNib(nibNamed: NSNib.Name("CustomView"), bundle: nil)
        var topLevelObjects: NSArray?
        nib?.instantiate(withOwner: self, topLevelObjects: &topLevelObjects)
        
        // 获取加载的NSView
        for object in topLevelObjects ?? [] {
            if let view = object as? NSView {
                customView = view
                break
            }
        }
        
        // 将NSView添加到视图层级中
        if let customView = customView {
            view.addSubview(customView)
            customView.translatesAutoresizingMaskIntoConstraints = false
            NSLayoutConstraint.activate([
                customView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
                customView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
                customView.topAnchor.constraint(equalTo: view.topAnchor),
                customView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
            ])
        }
    }
    
    @IBAction func buttonClicked(_ sender: NSButton) {
        // 处理NSButton点击事件
        print("Button clicked!")
    }
}