animateconstraints

animateconstraints

func animate() {
    UIView.animate(withDuration: 0.5, delay: 0.5, options: [.curveEaseOut], animations: {
        self.tree0.alpha = 1.0
        self.city.alpha = 1.0
        self.city2.alpha = 1.0
        self.manImage.alpha = 1.0
        }, completion: nil)
    
    UIView.animate(withDuration: 8.0, delay: 0.0, options: [.repeat, .curveLinear], animations: {
        self.city.frame = self.city.frame.offsetBy(dx: -1 * self.city.frame.size.width, dy: 0.0)
        self.city2.frame = self.city2.frame.offsetBy(dx: -1 * self.city2.frame.size.width, dy: 0.0)
        self.tree0.frame = self.tree0.frame.offsetBy(dx: -1 * self.city2.frame.size.width * 2, dy: 0.0)
    }, completion: nil)
}