如何將相同的速度設置爲UIView動畫

Question

我想將速度設置爲我的UISlider，以使其移動更平穩。

這裏是我正在試圖製作動畫：

UIView.animateWithDuration(6, delay: 0.0, options: UIViewAnimationOptions.TransitionCurlUp, animations: {() -> Void in 

      self.videoSlider.setValue(time, animated: true) 
      if self.videoSlider.value == self.videoSlider.maximumValue { 
       self.playerLayer.stop() 
       self.playBigButton.hidden = false 
       self.pauseButton.hidden = true 
       self.playButton.hidden = false 
      } 

      }, completion: { (finished: Bool) -> Void in 

     }) 

但它以不同的速度運動的開始，中間和結尾。

Answer 1

先給動畫的.CurveLinear的選項，如：

UIView.animateWithDuration(6, 
         delay: 0.0, 
        options: [UIViewAnimationOptions.TransitionCurlUp, .CurveLinear], 
        animations: {() -> Void in 

      self.videoSlider.setValue(time, animated: true) 
      if self.videoSlider.value == self.videoSlider.maximumValue { 
       self.playerLayer.stop() 
       self.playBigButton.hidden = false 
       self.pauseButton.hidden = true 
       self.playButton.hidden = false 
      } 

      }, completion: { (finished: Bool) -> Void in 

     })