How to load new data in CollectionView when refresh? - json

Question

I am making app with swift and getting data from my Wordpress Website and using Rest Api to display data in CollectionView, all works fine but the problem is when i add new posts in website it doesn’t automatically shows in app , and when i refresh data then also can’t see the newest post . this is my code on refresh
#objc
private func didPullToRefresh(_ sender: Any) {
sortBy = "&orderby=date"
page = 1
self.fetchPostData { (posts) in
self.newsData = posts }
SVProgressHUD.show()
self.collectionView.setContentOffset(CGPoint(x:0,y:0), animated: true)
refreshControl.endRefreshing()
}
and this is the code to fetch data
func fetchPostData(completionHandler: #escaping ([Post]) -> Void ) {
DispatchQueue.main.asyncAfter(deadline: .now()) {
SVProgressHUD.show()
}
let url = URL(string: "https://www.pbkalam.com/wp-json/wp/v2/posts/?page=\(page)\(sortBy)" )!
print(url)
let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
guard let data = data else {return}
do {
let postsData = try JSONDecoder().decode([Post].self, from: data)
completionHandler(postsData)
DispatchQueue.main.async {
self.collectionView.isUserInteractionEnabled = true
self.collectionView.reloadData()
SVProgressHUD.dismiss()
}
}
catch {
let error = error
print(String(describing: error))
SVProgressHUD.dismiss()
}
}
task.resume()
}
Here is my cell
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "postcell", for: indexPath) as! ViewCell
cell.setup(with: newsData[indexPath.row-(indexPath.row/4)])
when i use
sortBy = "&orderby=rand"
then it loads the random posts but not the newest.. please help
i have tried this code
#objc
private func didPullToRefresh(_ sender: Any) {
sortBy = "&orderby=date&order=desc"
page = 1
self.fetchPostData { (posts) in
self.newsData = posts }
self.collectionView.reloadData()
SVProgressHUD.show()
self.collectionView.setContentOffset(CGPoint(x:0,y:0), animated: true)
refreshControl.endRefreshing()
}