如何将带有自定义延迟的图像数组加载到Swift 3 Xcode 8中？

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var imageView: UIImageView!
    
    var imageArray: [UIImage] = [] // 包含图像文件的数组
    
    var currentIndex = 0 // 当前图像的索引
    
    var timer: Timer? // 计时器对象
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 初始化图像数组
        imageArray.append(UIImage(named: "image1")!)
        imageArray.append(UIImage(named: "image2")!)
        imageArray.append(UIImage(named: "image3")!)
        
        // 启动计时器
        startTimer()
    }
    
    func startTimer() {
        timer = Timer.scheduledTimer(timeInterval: 2.0, target: self, selector: #selector(loadNextImage), userInfo: nil, repeats: true)
    }
    
    @objc func loadNextImage() {
        // 停止计时器
        timer?.invalidate()
        
        // 延迟加载图像
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
            self.imageView.image = self.imageArray[self.currentIndex]
            
            // 更新索引
            self.currentIndex += 1
            if self.currentIndex >= self.imageArray.count {
                self.currentIndex = 0
            }
            
            // 重新启动计时器
            self.startTimer()
        }
    }
}