Swift Segmented Control Change Index Event, TableView not updating - ios

Question

I want to updated tableview from web services on change of segmented Control. As my code i have triggered event segmentedControlAction to update tableview in viewDidAppear event. it works on first time on Screen load but not working when i select next tab(Following), it fetch data from web service not update tableview. but when i switch to first Followers tab then come again to following tab it works, because it store data fetched from previuos web service
Datasource(ds) is get data from web service incase if it has nil records
TsButton is custom class which has only one member variable is object which is used for passing extra information to button click event
In StoryBoard there are two controls Segmented Control and tableview like in screen shot
My Code is below
class UserFollowController: BaseViewController
{
#IBOutlet var segmentedControl: UISegmentedControl!
#IBOutlet var tableView: UITableView!
private var ds : UserFollowTableDataSource!
override func viewDidLoad()
{
super.viewDidLoad()
ds = UserFollowTableDataSource(vc: self, tableView: tableView);
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if UserEntity.instance.username.characters.count == 0
{
let storyBoard : UIStoryboard = UIStoryboard(name:"Main", bundle:nil)
let vc = storyBoard.instantiateViewController(withIdentifier: "LoginController") as! LoginController
self.tabBarController?.selectedIndex = 0
self.present(vc, animated: true, completion: nil)
}
else
{
self.segmentedControlAction(sender: nil);
}
}
#IBAction func segmentedControlAction(sender: AnyObject?) {
if(segmentedControl.selectedSegmentIndex == 0)
{
ds.fetchFromWeb(type: "follower")
}
else
{
ds.fetchFromWeb(type: "following")
}
}
}
class UserFollowTableDataSource : NSObject, UITableViewDataSource
{
private var follower_records : [[String : Any]]?;
private var following_records : [[String : Any]]?;
private var records : [[String : Any]]?;
private var tableView : UITableView!;
private var vc : UserFollowController!;
private var loader : UIAlertController!;
private var type : String!
init(vc : UserFollowController, tableView : UITableView)
{
self.vc = vc;
self.tableView = tableView
self.loader = CommonUtil.getLoader(msg: "Getting List...");
super.init()
self.tableView.dataSource = self;
}
public func fetchFromWeb(type : String)
{
self.type = type;
self.loader.title = "Getting List...";
if (type == "follower")
{
if let data = self.follower_records
{
self.records = data;
self.tableView.reloadData();
self.tableView.setNeedsDisplay();
return;
}
self.vc.present(self.loader, animated: true, completion: nil)
HauteWebService.instance.get_user_followers(onSucess: { (response) in
if (response.status == 1)
{
DispatchQueue.main.async {
self.loader.dismiss(animated: true, completion: {
self.follower_records = response.data as! [[String : Any]]
self.records = self.follower_records
self.tableView.reloadData();
});
}
}
else
{
self._onError(msg: response.msg);
}
}, onFailure: { (msg) in
self._onError(msg: msg);
})
}
else
{
if let data = self.following_records
{
self.records = data;
self.tableView.reloadData();
self.tableView.setNeedsDisplay();
return;
}
self.vc.present(self.loader, animated: true, completion: nil)
HauteWebService.instance.get_user_following(onSucess: { (response) in
if (response.status == 1)
{
DispatchQueue.main.async {
self.loader.dismiss(animated: true, completion: {
self.following_records = response.data as! [[String : Any]]
self.records = self.follower_records
self.tableView.reloadData();
})
}
}
else
{
self._onError(msg: response.msg);
}
}, onFailure: { (msg) in
self._onError(msg: msg);
})
}
}
private func _onError(msg : String)
{
DispatchQueue.main.async {
self.loader.dismiss(animated: true, completion: {
let alert = CommonUtil.getAlertError(title: "Error while getting web service", msg: msg);
self.vc?.present(alert, animated: true, completion: nil)
})
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if self.records != nil
{
return self.records!.count;
}
return 0;
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "FollowTableCell", for: indexPath) as! FollowTableCell
let index = indexPath.row;
cell.tag = index;
if let record = self.records![index] as? [String : Any]
{
let first = record["firstname"] as! String
let last = record["lastname"] as! String
cell.lblName.text = first + " " + last;
var add = record["city"] as! String;
let state = record["state"] as! String;
if state != ""
{
add = add + ", " + state
}
cell.lblAddress.text = add;
cell.btnFollow.backgroundColor = TFColor.hexToUIColor(hex: "#AAAAAA")
cell.btnFollow.setTitle("Follow", for: .normal)
cell.btnFollow.object = record;
if let v = record["is_followed"] as? Int
{
if (v == 1)
{
cell.btnFollow.backgroundColor = TFColor.hexToUIColor(hex: "#887474")
cell.btnFollow.setTitle("Following", for: .normal)
}
}
cell.btnFollow.addTarget(self, action: #selector(self.btnFollowClick), for: .touchUpInside)
cell.ratingStar.changeEvent = false;
if let v = Float(record["rating"] as! String)
{
cell.ratingStar.rating = Int(v)
}
else
{
cell.ratingStar.rating = 0;
}
cell.imgProfile.image = UIImage(named: "no_image");
if let url = record["profile_image_url"] as? String
{
if let img = ImageEntity.readCache(key: url)
{
cell.imgProfile.image = img
}
else
{
HauteWebService.instance.downloadFile(url: url, onSucess: { (data) in
if let img = UIImage(data: data)
{
ImageEntity.writeCache(key: url, image: img)
DispatchQueue.main.async {
if cell.tag == index
{
cell.imgProfile.image = img
}
}
}
}, onFailure: { (msg) in
})
}
}
}
return cell;
}
#objc func btnFollowClick(_ sender: TsButton)
{
let record = sender.object as! [String : Any];
let id = record["id"] as! String;
let data = ["user_id" : id]
if let v = record["is_followed"] as? Int
{
self.loader.title = "Please Wait...";
vc.present(self.loader, animated: true, completion: nil);
if (v == 1)
{
HauteWebService.instance.delete_user_follow(data: data, onSucess: { (response) in
if (response.status == 1)
{
DispatchQueue.main.async {
self.loader.dismiss(animated: false, completion: {
DispatchQueue.main.async {
self.follower_records = nil
self.following_records = nil
self.fetchFromWeb(type : self.type)
}
});
}
}
else
{
self._onError(msg: response.msg)
}
}, onFailure: { (msg) in
self._onError(msg: msg);
})
}
else
{
HauteWebService.instance.save_user_follow(data: data, onSucess: { (response) in
if (response.status == 1)
{
DispatchQueue.main.async {
self.loader.dismiss(animated: false, completion: {
DispatchQueue.main.async {
self.follower_records = nil
self.following_records = nil
self.fetchFromWeb(type : self.type)
}
});
}
}
else
{
self._onError(msg: response.msg)
}
}, onFailure: { (msg) in
self._onError(msg: msg);
})
}
}
}
}
class FollowTableCell : UITableViewCell
{
#IBOutlet var imgProfile : UIImageView!
#IBOutlet var actvityImgProfile : UIActivityIndicatorView!
#IBOutlet var lblName : UILabel!
#IBOutlet var lblAddress : UILabel!
#IBOutlet var btnFollow : TsButton!
#IBOutlet var ratingStar : TsRatingStar!
}

Answer 1

In your following webservice callback you have
self.following_records = response.data as! [[String : Any]]
self.records = self.follower_records
Thus you are setting the records of the tableView to the wrong values in the webservice callback.
It should be:
self.following_records = response.data as! [[String : Any]]
self.records = self.following_records