UIView Frame Animation

viewframechange.swift

       let newFrame = CGRect(x:self.frame.origin.x, y: self.frame.origin.y, width:self.frame.size.width, height:((self.frame.size.height*2) + heightDiff));
        let scale:CABasicAnimation = CABasicAnimation.init(keyPath:"path");
        print("newFrame: \(newFrame)");
        scale.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut);
        scale.fromValue = self.frame;
        scale.toValue = newFrame;
        scale.duration = 1.0;
        scale.isRemovedOnCompletion = false;
        scale.fillMode = kCAFillModeForwards;
        scale.delegate = self;
        self.maskLayer.add(scale, forKey: "path");
        self.frame = CGRect(x:self.frame.origin.x, y: self.frame.origin.y, width:self.frame.size.width, height:((self.frame.size.height*2) + heightDiff));
        print("frame after animation: \(self.frame)");