ios png序列动画

今天做png 序列动画, 记录下

        var images_1 = [UIImage]()
        
        for i in 1 ... 60{
            let image = UIImage(named: "imageName\(i)")
            images_1.append(image!)
        }
        var imageView = UIImageView(frame: frame)
        imageView.animationImages = images_1
        imageView.animationDuration = 3//一次动画时间
        imageView.animationRepeatCount = 0//次数,0为一直播放
        imageView.startAnimating()
        //开始 stop 停止
        self.view.addSubview(imageView)