愛你最好的距離 ? — 氣球飛走了slider 練習

@IBAction func didTapSlider(_ sender: UISlider) {
    let speed = sender.value * 65
    let size = sender.value * 70
    self.balloonImageView.frame.origin.x = CGFloat(378-speed * 6)
    self.balloonImageView.frame.size = CGSize(width: CGFloat(201 - size), height: CGFloat(249 - size))
    self.balloonImageView.alpha = CGFloat(1-sender.value)
    if self.balloonImageView.frame.origin.x == 378 { 
       self.girlImageView.image = UIImage(named: "girl_happy" )
    
    }else if self.balloonImageView.frame.origin.x < 378 && self.balloonImageView.frame.origin.x > 164 {
       self.girlImageView.image = UIImage(named: "girl_notHappy" )
     }else {
       self.girlImageView.image = UIImage(named: "girl_cry" )
     }
}

GitHub：

Jou-ying/Slider