Swift 3-延迟重复动画

目前，该动画每3秒重复一次。我想有一个10秒的等待时间之间重复这个动画。我怎样才能做到这一点

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)


    UIView.animate(withDuration: 7.5, delay: 20,
                   options: .repeat,
                   animations: {
        self.imageAnimate.center.x += self.view.bounds.width * 2
    },
                   completion: nil
    )
}

---

使用

计时器

：

// note that I used 17.5 here because the animation itself takes 7.5 seconds
// so that will be 7.5 seconds of animating, 10 seconds of doing nothing
// and start animating again
Timer.scheduledTimer(withTimeInterval: 17.5, repeats: true) {
    UIView.animate(withDuration: 7.5, animations: {
        self.imageAnimate.center.x += self.view.bounds.width * 2
    })
}