Table View reloadData() not working when populating Values using UserDefaults - ios

Question

I am working on a project to shows news feeds to the user.
I am calling a function getNewsFeeds() to get news feeds.
I will generate new newsfeeds every one hour
ViewDidLoad(){
get current time in "HH" format and store it in currentTime
Store this currentTime in to a HoursVar variable using UserDefaults
}
ViewDidAppear(){
if( currentTime - HoursVar >= 1){
getNewsFeeds
}else{
}
retreiveStoredValuesFromUserDeafults()
}
I dont know where exactly to setup my tableViewDataSOurce and Delegate methods and reloadData to populate the tableView when getting data from the saved Userdefaults retreiveStoredValuesFromUserDeafults()
override func viewDidLoad() {
super.viewDidLoad()
hoursFormatter.dateFormat = "HH"
hoursVar = Int(hoursFormatter.string(from: hours))!
if hoursVar > 12 {
hoursVar = hoursVar - 12
}
self.defaults.set(self.hoursVar, forKey: "hoursVar")
customNavBar()
self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
feedsArray = ["Reliance","Economy"]
}
override func viewDidAppear(_ animated: Bool) {
//getRssFeeds()
if((hoursVar - myHoursVar) == 1 && (hoursVar - myHoursVar) > 1){
getRssFeeds()
}else{
feedsTable.register(UITableViewCell.self, forCellReuseIdentifier: "newsFeeds")
self.feedsTable.delegate = self
self.feedsTable.dataSource = self
retreiveMyArrayData()
feedsTableView.reloadData()
}
}
func getRssFeeds(){
for i in 0..<feedsArray.count{
let url = URL(string: "https://api.cognitive.microsoft.com/bing/v5.0/news/search?q=\(feedsArray[i])&count=3&mkt=en-in")
var request = URLRequest(url: url!)
request.setValue("My Subscription Key", forHTTPHeaderField: "Ocp-Apim-Subscription-Key")
Alamofire.request(request as URLRequest).responseJSON{response in
if let json = response.result.value as? [String:AnyObject]{
if let value = json["value"]{
//
print("json \(json)")
for j in 0..<value.count{
let items = value[j] as! [String:AnyObject]
let name = items["name"] as! String
let url = items["url"] as! String
let description = items["description"] as! String
let datePublished = items["datePublished"] as! String
let dateAndTime = datePublished.replacingOccurrences(of: "T", with: " ")
self.feedsName.append(name)
self.feedsUrl.append(url)
self.feedsDescription.append(description)
self.feedsDatePublished.append(dateAndTime)
if let image = items["image"] as? [String:AnyObject]{
if let thumbnail = image["thumbnail"] as? [String:AnyObject]{
let contentUrl = thumbnail["contentUrl"] as! String
self.feedsContentUrl.append(contentUrl)
}
}else{
self.feedsContentUrl.append(self.errorImage)
}
if let provider = items["provider"]{
for i in 0..<provider.count{
let items = provider[i] as! [String:AnyObject]
let providerName = items["name"] as! String
self.feedsProvider.append(providerName)
}
}
self.feedsTable.delegate = self
self.feedsTable.dataSource = self
self.feedsTable.reloadData()
self.defaults.set(self.feedsUrl, forKey: "feedsUrl")
self.defaults.set(self.feedsDescription, forKey: "feedsDescription")
self.defaults.set(self.feedsName, forKey: "feedsName")
self.defaults.set(self.feedsProvider, forKey: "feedsProvider")
self.defaults.set(self.feedsContentUrl, forKey: "feedsContentUrl")
self.defaults.set(self.feedsDatePublished, forKey: "feedsDatePublished")
print("All Counts \(self.feedsName.count)")
}
}
}
}
}
}
func slideOpen(){
self.revealViewController().revealToggle(animated: true)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return feedsName.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "newsFeeds") as! newsFeeds
randomNumberArray = randomNumber()
//self.feedsRandomArray.append(self.feedsRandom)
print("feedsRandom \(feedsRandom)")
selectedRow = randomNumberArray[indexPath.row]
let url = URL(string: feedsContentUrl[randomNumberArray[indexPath.row]])
do{
let data = try Data(contentsOf: url!)
cell.feedsImage.image = UIImage(data: data )
}catch{
print(error)
}
let tap = UITapGestureRecognizer(target: self, action: #selector(HomeViewController.tapFunction))
let titleAttributes = [NSFontAttributeName: UIFont.preferredFont(forTextStyle: UIFontTextStyle.headline), NSForegroundColorAttributeName: UIColor.purple]
let titleString = NSAttributedString(string: feedsName[randomNumberArray[indexPath.row]] , attributes: titleAttributes)
cell.feedsHeadlines.isUserInteractionEnabled = true
cell.feedsHeadlines.addGestureRecognizer(tap)
cell.feedsHeadlines.attributedText = titleString
cell.feedsDescription.text = feedsDescription[randomNumberArray[indexPath.row]]
cell.feedsPublisherName.text = feedsProvider[randomNumberArray[indexPath.row]]
cell.publishedOn.text = feedsDatePublished[randomNumberArray[indexPath.row]]
//print("All Counts \(myFeedsName.count) \(myFeedsProvider.count) \(myFeedsContentUrl.count) \(myFeedsUrl.count) \(myFeedsDescription.count) \(myFeedsDescription.count)")
return cell
}
func tapFunction(sender:UITapGestureRecognizer) {
let safariVC = SFSafariViewController(url: NSURL(string: feedsUrl[selectedRow]) as! URL)
self.present(safariVC, animated: true, completion: nil)
safariVC.delegate = self
}
func safariViewControllerDidFinish(_ controller: SFSafariViewController) {
controller.dismiss(animated: true, completion: nil)
}
func randomNumber() -> [Int] {
let feedsIndex = feedsName.count - 1
var randomNumber = Int(arc4random_uniform(UInt32(feedsIndex)))
print("Randome number \(randomNumber) \(randomNumberArray)")
for k in 0..<randomNumberArray.count{
while randomNumber == randomNumberArray[k] {
randomNumber = Int(arc4random_uniform(UInt32(feedsIndex)))
}
}
randomNumberArray.append(randomNumber)
self.defaults.set(self.randomNumberArray, forKey: "randomNumberArray")
return randomNumberArray
}
func retreiveMyArrayData(){
myFeedsUrl = defaults.stringArray(forKey: "feedsUrl") ?? [String]()
myFeedsDescription = defaults.stringArray(forKey: "feedsDescription") ?? [String]()
myFeedsName = defaults.stringArray(forKey: "feedsName") ?? [String]()
myFeedsProvider = defaults.stringArray(forKey: "feedsProvider") ?? [String]()
myFeedsContentUrl = defaults.stringArray(forKey: "feedsContentUrl") ?? [String]()
myFeedsDatePublished = defaults.stringArray(forKey: "feedsDatePublished") ?? [String]()
myHoursVar = defaults.integer(forKey: "hoursVar")
myFeedsRandom = defaults.array(forKey: "randomNumberArray") as! [Int]
print("Values \(myHoursVar) \(myFeedsProvider) \(myFeedsUrl.count)")
}

Answer 1

You can set UITableViewDataSourceand UITableViewDelegate into .xib

Answer 2

//Setting datasource & delegate for tableview inside viewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
self.feedsTableView.delegate = self
self.feedsTableView.datasource = self
}
Now, you need to reload the tableview when you setValue & retrieve the value to the userDefaults. self.feedsTableView.reloadData()
If this didn't helped you, please let me know. I'll work more to provide you with a complete workflow for the above project.