Anik0808

func readImageBuffer(fromVideo videoURL: URL) {
        let asset = AVAsset(url: videoURL)
        let assetTrack = asset.tracks.first!
        let assetReader = try! AVAssetReader(asset: asset)
        
        let outputSettings: [String: Any] = [
            String(kCVPixelBufferPixelFormatTypeKey): kCVPixelFormatType_32BGRA,
            String(kCVPixelBufferWidthKey): 513,
            String(kCVPixelBufferHeightKey): 513,
        ]

Anik0808

        //generate a file url to store the video. some_image.jpg becomes some_image.mov
        guard let outputMovieURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first?.appendingPathComponent("output.mov") else {
            fatalError("somehting went wrong") //an error i made up
        }
        //delete any old file
        do {
            try FileManager.default.removeItem(at: outputMovieURL)
        } catch {
            print("Could not remove file \(error.localizedDescription)")
        }

Anik0808

func scrollViewDidScroll(_ scrollView: UIScrollView) {
        // get the content offset for y-axis
        let contentOffsetheight = scrollView.contentOffset.y
        //if the value is negative
        if contentOffsetheight < 0 {
            //change the anchors
            contentViewTopAnchor.constant   = contentOffsetheight
            headerViewHeightAnchor.constant = 450 + (-contentOffsetheight)
        }
    }

Anik0808

parentScrollView.delegate = self

Anik0808

func setupView(){
        view.backgroundColor = .black
        //setup the scrollView
        view.addSubview(parentScrollView)
        parentScrollView.fillSuperview()
        parentScrollView.contentSize = CGSize(width: DeviceSize.width,
                                              height: DeviceSize.height*2)

        //setup the content view
        parentScrollView.addSubview(contentView)

Anik0808

func setupView(){
        view.backgroundColor = .black
        //setup the scrollView
        view.addSubview(parentScrollView)
        parentScrollView.fillSuperview()
        parentScrollView.contentSize = CGSize(width: DeviceSize.width,
                                              height: DeviceSize.height*2)
        
        //setup the content view
        parentScrollView.addSubview(contentView)

Anik0808

var contentViewTopAnchor: NSLayoutConstraint!
var headerViewHeightAnchor: NSLayoutConstraint!

Anik0808

import UIKit

// Reference Video: https://youtu.be/iqpAP7s3b-8
struct AnchoredConstraints {
    var top, leading, bottom, trailing, width, height: NSLayoutConstraint?
}


let DeviceSize = UIScreen.main.bounds.size

Anik0808

    let parentScrollView: UIScrollView = {
        let sv = UIScrollView()
        sv.contentInsetAdjustmentBehavior = .never
        return sv
    }()
    
    let contentView: UIView = {
        let view = UIView()
        return view
    }()

Anik0808

struct HomeView: View {
    @EnvironmentObject var subscription: Subscription
    var body: some View {
        VStack{
            if subscription.isSubscribed{
                Text("Welcome Premium User.")
            }
            else{
                Text("Welcome to the App.")
            }