UICollectionView shows up on simulator but not actual device - ios

Question

building my first iOS app here and I am stuck. I searched online and did not find anything about this particular issue.
Basically I have a UICollectionView displaying some data. Everything works fine on the simulator, but on the actual iPhone, it's like the UICollectionView is just not there.
No error messages and the app doesn't crash, and all the other elements of the App are functioning properly so I am quite perplexed.
Code:
//
// SecondViewController.swift
//
// Created by pc on 3/5/19.
// Copyright © 2019 BF. All rights reserved.
//
import UIKit
import WebKit
import SwiftSoup
class SecondViewController: UIViewController, WKNavigationDelegate, UICollectionViewDataSource {
#IBOutlet var dataTable: UICollectionView!
#IBOutlet weak var viewHeader: UILabel!
#IBOutlet weak var viewFooter: UILabel!
#IBAction func backButtonClicked(_ sender: UIButton) {
dismissVC()
}
var webView: WKWebView!
var tableContent = [[String]]()
var vSpinner : UIView?
var testString = [[String]]()
var submittedValue2: String = ""
var currentSelection2: String = ""
override func viewDidAppear(_ animated: Bool) {
let alert = UIAlertController(title: nil, message: "Please wait...", preferredStyle: .alert)
let loadingIndicator = UIActivityIndicatorView(frame: CGRect(x: 10, y: 5, width: 50, height: 50))
loadingIndicator.hidesWhenStopped = true
loadingIndicator.style = UIActivityIndicatorView.Style.gray
loadingIndicator.startAnimating();
alert.view.addSubview(loadingIndicator)
present(alert, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
self.dataTable.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")
//dataTable.backgroundColor = UIColor.white
dataTable.delegate = self as? UICollectionViewDelegate
dataTable.dataSource = self
if let layout = dataTable.collectionViewLayout as? UICollectionViewFlowLayout {
layout.scrollDirection = .horizontal
}
webView = WKWebView()
webView.navigationDelegate = self
//view = webView
let url = URL(string: "https://someWebsite.com")!
webView.load(URLRequest(url: url))
webView.allowsBackForwardNavigationGestures = true
runData()
}
///////ADDS DELAY
func runData() {
DispatchQueue.main.asyncAfter(deadline: .now() + 4) { // Change `2.0` to the desired number of seconds.
self.setWebViewValue(name: "txtValue", data: self.submittedValue2, vin: self.currentSelection2)
}
}
///////// PULLS DATA
func setWebViewValue(name: String, data: String, vin: String) {
if vin == "VIN:" {
webView.evaluateJavaScript("document.getElementById('rbRequest_1').click()", completionHandler: nil)
}
else {
}
webView.evaluateJavaScript("document.getElementById(\"\(name)\").value = \"\(data)\"", completionHandler: nil)
webView.evaluateJavaScript("document.getElementById('btnSubmit').click()", completionHandler: nil)
DispatchQueue.main.asyncAfter(deadline: .now() + 1) { // Change `2.0` to the desired number of seconds.
self.webView.evaluateJavaScript("document.documentElement.outerHTML.toString()") { (result, error) -> Void in
if error != nil {
print(error!)
}
let document = try! SwiftSoup.parse(result as! String)
for row in try! document.select("table[id=\"gvTests\"] tr") {
var rowContent = [String]()
for col in try! row.select("td") {
let colContent = try! col.text()
rowContent.append(colContent)
}
self.tableContent.append(rowContent)
}
if self.tableContent.isEmpty == false {
//self.tableContent.remove(at: 0)
self.tableContent[0] = ["Make","Model","Year","Date","Pass/Fail","Certificate","Referee"]
}
print(self.tableContent)
self.tableContent = self.transpose(input: self.tableContent)
if self.tableContent.isEmpty == false {
self.dataTable.reloadData()
}
}
self.dismiss(animated: false, completion: nil)
}
}
////// Collection View functions
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if tableContent.isEmpty == false {
return tableContent[0].count
}
else {
return 0
}
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
if tableContent.isEmpty == false {
return tableContent.count
}
else {
return 0
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
let title = UILabel(frame: CGRect(x: 0,y: 0,width: cell.bounds.size.width,height: cell.bounds.size.height))
for subview in cell.contentView.subviews {
subview.removeFromSuperview()
}
cell.contentView.addSubview(title)
title.text = tableContent[indexPath.section][indexPath.item]
//title.textColor = UIColor.black
title.layer.borderWidth = 1
title.layer.borderColor = UIColor.black.cgColor
title.textAlignment = NSTextAlignment.center
return cell
}
public func transpose<T>(input: [[T]]) -> [[T]] {
if input.isEmpty { return [[T]]() }
let count = input[0].count
var out = [[T]](repeating: [T](), count: count)
for outer in input {
for (index, inner) in outer.enumerated() {
out[index].append(inner)
}
}
return out
}
func dismissVC() {
dismiss(animated: true, completion: nil)
}
}

Answer 1

This might cause from constraint on your collectionView.

Answer 2

Turns out the issue is not with the UIcollectionview, but that the data is empty because instead of being extracted from the website like it is when ran in the simulator. I will post another question for that. Thanks all.