How to update RSS data in UITableView? - swift

Question

What I have: the project, written on SWIFT5, which is an rss reader (I use standard XMLParser ). I fill cells with data from parser. In order to update the data in cells I implemented UIRefreshControl and wrote objc method, which contains the same method(fetchData - see in code), as I use to get data, but it doesn't work. Moreover, this method is called only once, when app is launched. When I close app and then open, data is not updated... How can I deal with it?
What I want: when refreshControl is activated, data in cells should be updated
What I did: I declared a variable called refreshControl, add it to tableView and wrote a method #refresh related to control
import UIKit
class MainViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var table: UITableView!
private let url = "my url"
private var rssItems: [RSSItem]? {
didSet {
DispatchQueue.main.async {
self.table.reloadData()
}
}
}
var refreshControl = UIRefreshControl()
#objc func refresh (sender: UIRefreshControl) {
fetchData()
sender.endRefreshing()
}
override func viewDidLoad() {
super.viewDidLoad()
refreshControl.addTarget(self, action: #selector(refresh(sender:)), for: .valueChanged)
self.table.refreshControl = refreshControl
table.addSubview(refreshControl)
fetchData()
}
private func fetchData() {
let feedParser = FeedParser()
feedParser.parseFeed(url: url) { (rssItems) in
self.rssItems = rssItems
DispatchQueue.main.async {
self.table.reloadData()
}
}
}

Answer 1

End refreshing once you get data and set or add refresh control
#objc func refresh (sender: UIRefreshControl) {
fetchData()
}
override func viewDidLoad() {
super.viewDidLoad()
refreshControl.addTarget(self, action: #selector(refresh(sender:)), for: .valueChanged)
self.table.refreshControl = refreshControl
// table.addSubview(refreshControl)
fetchData()
}
private func fetchData() {
let feedParser = FeedParser()
feedParser.parseFeed(url: url) { (rssItems) in
self.rssItems = rssItems // as you are reloading table here
DispatchQueue.main.async {
refreshControl.endRefreshing()
// self.table.reloadData()
}
}
}