Javier Sanz Rozalén Javier Sanz Rozalén - 1 year ago 55
JSON Question

TableView does not show data

I am trying to fill my

UITableView
with some data I receive from a GET request. I don't know why but if in my
numberOfRowsInSection
, I return an specific value (for example, 8) it represents the info. If y return the value of my array filled by the request, the
UITableView
does not add any row:

class DashboardTableViewController: UITableViewController {

var userData = [String]()
var secondUserData = [String]()
var name: String = ""

override func viewDidLoad() {
super.viewDidLoad()
}

override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}

/* This function gets the user account information from a JSON in a simple request */

private func loadUserData(completion: @escaping (_ myArray: [String]) -> Void) {
let session = Twitter.sharedInstance().sessionStore.session()
let client = TWTRAPIClient.withCurrentUser()
let userInfoURL = "https://api.twitter.com/1.1/users/show.json"
let params = ["user_id": session?.userID]
var clientError : NSError?
let request = client.urlRequest(withMethod: "GET", url: userInfoURL, parameters: params, error: &clientError)
client.sendTwitterRequest(request) { (response, data, connectionError) -> Void in
if connectionError != nil {
print("Error: \(connectionError)")
}

do {
let json = JSON(data: data!)
if let userName = json["name"].string,
let description = json["description"].string,
let followersCount = json["followers_count"].int,
let favouritesCount = json["favourites_count"].int,
let followingCount = json["friends_count"].int,
let lang = json["lang"].string,
let nickname = json["screen_name"].string {

self.userData.append(userName)
self.userData.append(nickname)
self.userData.append(String(followersCount))
self.userData.append(String(followingCount))
self.userData.append(String("22"))
self.userData.append(lang)
self.userData.append(description)
self.userData.append("No country")

completion(self.userData)
}
}
}
}

/* This closure helps us to fill the labels once the request has been finished in loadUserData */

func manageUserData(label: UILabel, index: Int) {
loadUserData {
(result: [String]) in
label.text = result[index]
}
}

// MARK: - Table view data source

override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return self.userData.count
}

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let rowNumber = indexPath.row
let cellIdentifier = "TableViewCell"
guard let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as? TableViewCellController else {
fatalError("The dequeued cell is not an instance of TableViewCellController.")
}

switch rowNumber {
case 0:
cell.titlePlaceholder.text = "Name:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
case 1:
cell.titlePlaceholder.text = "Nickname:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
case 2:
cell.titlePlaceholder.text = "Followers:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
case 3:
cell.titlePlaceholder.text = "Following:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
case 4:
cell.titlePlaceholder.text = "Tweets:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
case 5:
cell.titlePlaceholder.text = "Language:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
case 6:
cell.titlePlaceholder.text = "Biography:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
case 7:
cell.titlePlaceholder.text = "Country:"
manageUserData(label: cell.valuePlaceholder, index: rowNumber)
default:
cell.titlePlaceholder.text = "?"
cell.valuePlaceholder.text = "?"
}

return cell
}


}

Any idea why this is happening ?
Thank you very much!!

Answer Source

Swift solution:

tableView.reloadData()

If you are calling it not from the main thread:

DispatchQueue.main.async {
    self.tableView.reloadData()
}
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