Animated scroll to left or right for distance

UIScrollView+scrollForDistance.swift

extension UIScrollView {

    func scrollToLeft(for distance: CGFloat, withAnimationDuration animationDuration: TimeInterval = 0.3) {
        var newOffset = self.contentOffset.x - distance
        if newOffset < 0 {
            newOffset = 0
        }
        UIView.animate(withDuration: animationDuration) {
            self.contentOffset.x = newOffset
        }
    }

    func scrollToRight(for distance: CGFloat, withAnimationDuration animationDuration: TimeInterval = 0.3) {
        var newOffset = self.contentOffset.x + distance
        let maxOffset = self.contentSize.width - self.bounds.width
        if newOffset > maxOffset {
            newOffset = maxOffset
        }
        UIView.animate(withDuration: 0.3) {
            self.contentOffset.x = newOffset
        }
    }

}