Tableview doesn't display data in swift 2 - ios

Question

I'm working on the tableView in swift 2.2 in xcode 7.3.1 and I'm sure from my code because it's not the first time for me to deal with tableView , I'm pulling data correctly from server and stored it in array but I notice the two function that is related to table view is not called so the table view appear empty for me ! I added cell and linked tableview with view also from layout.
I don't know where is the problem!
class studentTeacherList: UIViewController , UITableViewDataSource,UITableViewDelegate {
#IBOutlet weak var studentParentTable: UITableView!
#IBOutlet weak var loadIndicator: UIActivityIndicatorView!
var username:String!
var fromSender: String?
var toRec: String?
var student_id = [Int]()
var parent_id = [String]()
var student_names = [String]()
var parent_name = [String]()
//Sent Data
var s_id:Int = 0
var s_name = ""
var p_id = ""
var p_name = ""
override func viewDidLoad() {
super.viewDidLoad()
studentParentTable.delegate = self
studentParentTable.dataSource = self
let prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
username = prefs.objectForKey("user")as! String
fromSender = prefs.objectForKey("Sender")as! String
toRec = prefs.objectForKey("Receiver")as! String
self.loadIndicator.startAnimating()
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), { () -> Void in
self.loadList()
//self.studentParentTable.reloadData()
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.loadIndicator.stopAnimating()
})
});
studentParentTable.reloadData()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return student_names.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//This method to define each cell at Table View
let cell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "cell")
cell.textLabel?.text = student_names[indexPath.row]
cell.detailTextLabel?.text = parent_name[indexPath.row]
return cell
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func backButton(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil )
}
func loadList()
{
var normallink = "mylinkhere"
normallink = normallink + "?teacherid=" + self.username
var studentParentURL:NSURL = NSURL (string: normallink)!
let data = NSData(contentsOfURL: studentParentURL)!
do {
let json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments)
if let alldata = json["data"] as? [[String: AnyObject]] {
for onedata in alldata {
if let stu_id = onedata["id"] as? Int {
student_id.append(stu_id)
}
if let stu_name = onedata["studentName"] as? String {
student_names.append(stu_name)
}
if let par_id = onedata["parentId"] as? String {
parent_id.append(par_id)
}
if let par_name = onedata["parentName"] as? String {
parent_name.append(par_name)
}
}
}
} catch {
print("Error Serializing JSON: \(error)")
}
print(student_names.count)
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
s_id = student_id[indexPath.row]
s_name = student_names[indexPath.row]
p_id = parent_id[indexPath.row]
p_name = parent_name[indexPath.row]
}
}

Answer 1

It looks like you aren't reloading after this call:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), { () -> Void in
self.loadList()
//self.studentParentTable.reloadData()
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.loadIndicator.stopAnimating()
})
});
So you should add studentParentTable.reloadData() after self.loadIndicator.stopAnimating().