How to Make My Level Menu Scrollable Vertically

How can I make my level menu scrollable vertically?

Here is some code that I use to scroll vertically, I've adapted it to fit your menu. It doesn't perfectly line up to all your items, but it'll give you somewhere to start. And it'll show you how to figure this out on your own.

EDIT: I've updated the code use these funds instead. Still declare your buttons the same way but call my createMenu func to actually create the menu. It is looped so it auto adjusts if you change the number of menu items. the only thing you have to be aware of is; if you add or remove buttons change the array at the top of createMenu accordingly. Also adjust the padding variable to how much vertical space you want between the items

func createMenu() {

    let buttons = [levelButton1, levelButton2, levelButton3, levelButton4, levelButton5, levelButton6, levelButton7, levelButton8, levelButton9, levelButton10, levelButton11, levelButton12, levelButton13, levelButton14, levelButton15, levelButton16, levelButton17, levelButton18]
    let padding: CGFloat = 400

    let numberOfRows = CGFloat(buttons.count / 3)

    scrollCell = SKSpriteNode(color: .blue, size: CGSize(width: 1024, height: levelButtonSize.height * numberOfRows + padding * numberOfRows))
    scrollCell.position = CGPoint(x: 0 - self.size.width / 4, y: 0 - (scrollCell.size.height - self.size.height / 2))
    scrollCell.anchorPoint = CGPoint.zero
    scrollCell.zPosition = 0
    self.addChild(scrollCell)

//        let backgroundImage = SKSpriteNode(imageNamed: "bg")
//        backgroundImage.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
//        self.addChild(backgroundImage)

    let column1PosX = scrollCell.size.width / 3 / 2
    let column2PosX = scrollCell.size.width / 2
    let column3PosX = scrollCell.size.width / 3 / 2 + scrollCell.size.width / 3 * 2
    var colCount = 0
    var rowCount = 0

    for button in buttons {

        var posX: CGFloat = column2PosX
        if colCount == 0 {
            posX =  column1PosX
        }
        else if colCount == 2 {
            posX =  column3PosX
            colCount = -1
        }

        let indexOffset = CGFloat(rowCount) * (levelButtonSize.height + padding)
        let posY = scrollCell.size.height - levelButtonSize.height / 2 - (indexOffset + padding / 2)
        button.position = CGPoint(x: posX, y: posY)
        button.setScale(0.5)
        button.zPosition = 10
        scrollCell.addChild(button)

        if colCount == -1 {
            rowCount += 1
        }
        colCount += 1
    }
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    if let touch = touches.first as UITouch! {

        self.scrollCell.removeAllActions()
        initialTouch = touch.location(in: self.scene!.view)
        moveAmtY = 0
        initialPosition = self.scrollCell.position
    }
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {

    if let touch = touches.first as UITouch! {

        let movingPoint: CGPoint = touch.location(in: self.scene!.view)

        moveAmtY = movingPoint.y - initialTouch.y

        scrollCell.position = CGPoint(x: initialPosition.x, y: initialPosition.y - moveAmtY)
    }
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {

    checkForResettingSlider()
    yMoveActions(moveTo: -moveAmtY)
}

func checkForResettingSlider() {

    let topPos: CGFloat = scrollCell.size.height - self.size.height / 2
    let bottomPos = 0 - (self.size.height / 2)

    if scrollCell.position.y > bottomPos {

        let move = SKAction.moveTo(y: bottomPos, duration: 0.3)
        move.timingMode = .easeOut
        scrollCell.run(move)
    }

    if scrollCell.position.y < -topPos {

        let move = SKAction.moveTo(y: -topPos, duration: 0.3)
        move.timingMode = .easeOut
        scrollCell.run(move)
    }
}

func yMoveActions(moveTo: CGFloat) {

    let move = SKAction.moveBy(x: 0, y: (moveTo * 1.5), duration: 0.3)
    move.timingMode = .easeOut

    self.scrollCell.run(move, completion: { self.checkForResettingSlider() })
}

How to enable vertical scrolling on some levels in multi-level fly-out menu

If you don't want to use javascript to decide "which year the qarter/month belongs to", a quick fix would be to position the child elements of the overflowed container relative to the viewport (position:fixed;): https://jsfiddle.net/69yLp2fa/16/

Edit

Or with absolute positioning, but the rule is not to use overflow and position on the same container. Create another container for the overflown element and move positioning there, so that the absolute positioned child will not be placed relative to the overflow ancestor:
https://jsfiddle.net/hg8rbksy/2/

How to make long Bootstrap dropdown menus vertically scrollable?

You can do this by specifying max-height and overflow-y on the dropdown:

.dropdown-menu{
    max-height: 400px;
    overflow-y: auto;
}

You can calculate the max-height in JS or use viewport units. For example, if you want your dropdown to fill the space up until the bottom of the page, you could use: max-height: calc(100vh - 50px), where 50px is the height of your header.

Note that in the above solution the list on the left will not be scrolled independently of the dropdown. Once you reach the end of the dropdown, it will continue scrolling the list.
To prevent this, make the panel overflow as well:

.panel.panel-primary{
    max-height: 60vh;
    overflow-y: auto;
}

Again, it depends on your use case on how to go about to calculate the max heights.

CSS Vertical menu-submenu with scroll

The problem is that you defined a height in your element that creates a vertical scrollbar, if you don't need to set a fixed height for your container, you could try this change.

.scrollbar{
    width:250px;
    min-height:300px; /* min-height instead of height */
    background-color:lightgray;
    margin-top:40px;
    margin-left:40px;
    /*overflow-y:scroll;/* /*comment this line */
    float:left;
}

.content{
    min-height:450px; /* min-height instead of height */
}

Example without scroll
http://jsfiddle.net/guilhermelucio/0Lxtmeyp/2/

Update:

Example with scroll

See an example in JsFiddle: http://jsfiddle.net/guilhermelucio/0Lxtmeyp/3/

Making a drop-down menu scrollable

Try this using css like,

#topNav ul li ul{
   max-height:250px;/* you can change as you need it */
   overflow:auto;/* to get scroll */
}

Demo

Mobile slide menu scrollable

Fixed it myself:

overflow-y: scroll;