Swift 将3个图像依次排列以显示在图像视图上

下面func中的我的swift代码在图像视图中显示2个图像。我下面的代码现在成功地做到了这一点，但它只能显示2个图像。我想把a、b、cd各显示一秒钟，然后在一个无休止的循环中重复

let image1 = UIImage(named: "a.png")
let image2 = UIImage(named: "b.png")
let image3 = UIImage(named: "cd.png")
  var fan = UIImageView()




@objc func alterImage() {
    fan.image = fan.image == image2 ? image1 : image2
    perform(#selector(alterImage), with: self, afterDelay: 1)
}

试试这个

@objc func alterImage() {
    fan.image = fan.image == image1 ? image2 : fan.image == image2 ? image3 : image1
    perform(#selector(alterImage), with: self, afterDelay: 1)
}

有一个名为por的属性用于此目的，一个用于控制其持续时间，另一个用于控制其重复。您只需要将其设置为零，以实现无止境的循环。设置完这些属性后，只需调用

UIImageView

的方法

---

import UIKit
class ViewController: UIViewController {
    @IBOutlet weak var imageView: UIImageView!
    override func viewDidLoad() {
        super.viewDidLoad()
        let image1 = UIImage(named: "a")!
        let image2 = UIImage(named: "b")!
        let image3 = UIImage(named: "c")!
        imageView.animationImages = [image1, image2, image3]
        imageView.animationDuration = 1
        imageView.animationRepeatCount = 0
        imageView.startAnimating()
    }
}