extension YourMenuDataSourceClass: SKMenuViewDataSource {

	func menuViewItemSpacing(_ menuView: SKMenuView) -> CGFloat {
		return 10.0
	}

	func menuViewItemZoomScale(_ menuView: SKMenuView) -> CGFloat {
		return 1.25
	}

	func menuViewNumberofItems(_ menuView: SKMenuView) -> Int {
		return self.menuItems.count
	}

	// menu item properties (image & selection color) at index
	func menuView(_ menuView: SKMenuView, menuItemAt index: Int) -> SKMenuViewItem {
		return SKMenuViewItem(image: UIImage(), selectionColor: .white)
	}

	func menuViewItemSize(_ menuView: SKMenuView) -> CGSize {
		return CGSize(width: 55, height: 50)
	}

	// Configure different color combinations (selection state, normal state & back ground) for better user experience
	func menuViewNormalStateBackgroundColor(_ menuView: SKMenuView) -> UIColor {
		return UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 0.3)
	}

	func menuViewSelectionStateBackgroundColor(_ menuView: SKMenuView) -> UIColor {
		return .clear
	}

	func menuViewItemNormalStateColor(_ menuView: SKMenuView) -> UIColor {
		return .white
	}
}

// layouts are 4 types, .top(offset), .left(offset), .bottom(offset), .right(offset)
// animationStyle can be confiugred as .plain / .zoom
let menu = SKMenuView.initializeMenu(on: self.view,
                                     dataSource: self,
                                     layout: .right(10),
                                     animateStyle: .plain)

menu.delegate = self

extension YourMenuDelegateClass: SKMenuViewDelegate {
	// Perform actions intended to selected index
	func menuView(_ menuView: SKMenuView, didSelectRowAt index: Int) {
	}
}

menu.loadMenu()

// can select menu item on demand.
menu.selectMenuItem(at: 2)