View at the bottom in a UIScrollView, with AutoLayout

Question

I\'m setting up content in a scroll view with autolayout. The objects in the scrollview are pinned top-to-bottom to the previous one, so that they are under one another. I h

Answer 1

you need to check ContentSize of scrollView and modify FooterView Top Constraint with the required Value

My class code

import UIKit

class scrollViewDrag: UIViewController
{
    /// ScrollView Outlet
    @IBOutlet weak var mainScrollView: UIScrollView!

    /// Footer View top spacing constraint
    @IBOutlet weak var footerViewTopConstraint: NSLayoutConstraint!

    /// Used for ScrollView Height
    var screenHeight = CGFloat()

    /// Did Load
    override func viewDidLoad() {
        super.viewDidLoad()

    }

    /// Function used to check for height 
    func checkForHeight(){
        /// Get scrollView Height
        screenHeight = mainScrollView.frame.size.height

        /// Check contentSize Height ?
        if mainScrollView.contentSize.height >= screenHeight {
            /// When ScrollView is having height greater than your scrollView Height
            /// Footer will scroll along other Views
        }
        else{
            /// Issue Case
            let spacingValue = screenHeight-mainScrollView.contentSize.height
            footerViewTopConstraint.constant = spacingValue
        }
    }

    /// Call the height function in DidAppear
    override func viewDidAppear(_ animated: Bool) {
        checkForHeight()
    }
}

Storyboard

I had used Four View with Equal Heights And at last a footerView is attached as Fourth View

FooterView Top Constraint

Top constraint used as footerViewTopConstraint

Output

Case 1 - Size is greater than scrollView Height

Case 2 - Expected Output