swift activityIndicater is not remove after completing data loading - json

Question

I have a infinite-scrolling in tableView like facebook, it works very well but the problem is activityIndicator does not hide when complete data loading.
NetworkRequestAPI Request
import Foundation
class NetworkRequestAPI {
static func getPropductListByCategory(productId : Int, pageNo : Int , completion: #escaping ([Product]? , Error?) -> ()){
let url = URL(string: Configuration.BASE_URL+"/product-by/type?product_type_id="+String(productId)+"&page="+String(pageNo))
var categoryObject = [Product]()
URLSession.shared.dataTask(with:url!) { (urlContent, response, error) in
if error != nil {
}
else {
do {
let json = try JSONSerialization.jsonObject(with: urlContent!) as! [String:Any]
let products = json["products"] as? [String: Any]
// productCount = (json["product_count"] as? Int)!
let items = products?["data"] as? [[String:Any]]
items?.forEach { item in
let oProduct = Product()
oProduct.product_id = item["product_id"] as? Int
oProduct.product_name = item["product_name"] as? String
oProduct.product_image = item["product_image"] as? String
let ratingItem = item["rating_info"] as? [String: AnyObject]
let rating = RatingInfo()
rating.final_rating = ratingItem?["final_rating"] as? String
oProduct.rating_info = rating
categoryObject.append(oProduct)
}
completion(categoryObject, nil)
} catch let error as NSError {
print(error)
completion(nil, error)
}
}
}.resume()
}
}
ListTableView Class
class ListTableView: UITableViewController {
var isInitUILoad = true
var arrProduct = [[Product]]()
var product_id:Int = 0
var pageNo = 1
override func viewDidLoad() {
super.viewDidLoad()
self.initUILoad()
}
func initUILoad(){
ActivityIndicator.customActivityIndicatory(self.view, startAnimate: true)
NetworkRequestAPI.getPropductListByCategory(productId: product_id, pageNo: pageNo) { (products, error) in
DispatchQueue.main.async(execute: {
if products != nil {
self.pageNo += 1
self.arrProduct.append(products!)
print(self.arrProduct.count)
}else{
print(error.debugDescription)
}
ActivityIndicator.customActivityIndicatory(self.view, startAnimate: false)
self.tableView?.reloadData()
self.isInitUILoad = false
})
}
}
func loadMore(complition:#escaping (Bool) -> ()) {
NetworkRequestAPI.getPropductListByCategory(productId: product_id, pageNo: pageNo) { (products, error) in
DispatchQueue.main.async(execute: {
if error != nil{
print(error.debugDescription)
}
if products != nil && products?.count ?? 0 > 0{
self.pageNo += 1
self.arrProduct.append(products!) self.tableView?.insertSections([self.arrProduct.count - 1], with: .fade)
}else{
print("no product left")
}
complition(true)
})
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: categoryCellid, for: indexPath) as! ListTableCell
var categoryObject = arrProduct[indexPath.section]
cell.product = categoryObject[indexPath.item]
return cell
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 115.0
}
override func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
let footerView = tableView.dequeueReusableHeaderFooterView(withIdentifier: footerCellid) as! HeadFooterCell
if !isInitUILoad {
tableView.tableFooterView?.isHidden = true
loadMore(complition: { (isDone) in
footerView.activityIndicatorView.stopAnimating()
})
}
return footerView
}
override func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 0.01
}
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
let lastSectionIndex = tableView.numberOfSections - 1
let lastRowIndex = tableView.numberOfRows(inSection: lastSectionIndex) - 1
if indexPath.section == lastSectionIndex && indexPath.row == lastRowIndex {
// print("this is the last cell")
let spinner = UIActivityIndicatorView(activityIndicatorStyle: .gray)
spinner.startAnimating()
spinner.backgroundColor = .green
spinner.frame = CGRect(x: CGFloat(0), y: CGFloat(0), width: tableView.bounds.width, height: CGFloat(44))
self.tableView.tableFooterView = spinner
self.tableView.tableFooterView?.isHidden = false
}
}
HeadFooterCell
class HeadFooterCell: UITableViewHeaderFooterView {
override init(reuseIdentifier: String?) {
super.init(reuseIdentifier: reuseIdentifier)
setupViews()
}
var activityIndicatorView : UIActivityIndicatorView = {
var activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .gray)
activityIndicatorView.backgroundColor = UIColor.cyan
return activityIndicatorView
}()
func setupViews() {
addSubview(activityIndicatorView)
addConstraintsWithFormat("H:|[v0]|", views: activityIndicatorView)
addConstraintsWithFormat("V:|[v0(50)]|", views: activityIndicatorView)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}

Answer 1

You need to stop it in the main thread:
DispatchQueue.main.async {
footerView.activityIndicatorView.stopAnimating()
}
Also, set hidesWhenStopped to true:
footerView.activityIndicatorView.hidesWhenStopped = true