Styjun

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)
 

This might cause from constraint on your collectionView.

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.