Swift 3 - 延迟重复动画

Question

目前，此动画每3秒重复一次。我希望在重复动画之间等待10秒。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 
    ) 
} 

Answer 1

使用Timer：

// 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 
    }) 
}