使用UISwitch和NSMutableArray切换图片

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var mySwitch: UISwitch!
    @IBOutlet weak var imageView: UIImageView!
    
    var imageArray: NSMutableArray = []
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 添加需要切换的图片到数组中
        imageArray.add(UIImage(named: "image1")!)
        imageArray.add(UIImage(named: "image2")!)
        
        // 监听UISwitch的状态改变事件
        mySwitch.addTarget(self, action: #selector(switchStateChanged(_:)), for: .valueChanged)
    }
    
    @objc func switchStateChanged(_ sender: UISwitch) {
        if sender.isOn {
            // 切换到第一张图片
            imageView.image = imageArray[0] as? UIImage
        } else {
            // 切换到第二张图片
            imageView.image = imageArray[1] as? UIImage
        }
    }
}