Data from parse is not being passed through prepareForSegue - swift

Question

I want to get the objectId from parse and pass it through segue. But the objectId is passing over as an empty string:
class QueryViewController: UIViewController {
var objectIdFormParse = String()
#IBAction func makeQueryButtonTapped(_ sender: UIButton) {
makeSearchObject.saveInBackground { (success, error) in
if error == nil {
if let getObjectId = makeSearchObject.objectId {
self.objectIdFormParse = getObjectId
print("objectId in queryVC: \(self.objectIdForomParse)")
}
//Successfully saved
} else {
//Error, check error
}
}
performSegue(withIdentifier: resultsSegue, sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == resultsSegue
{
let destination = segue.destination as! ResultsViewController
destination.objectIdFromQueryVC = objectIdForomParse
}
}
}
The print statement prints the objectId correctly, but the segue passes empty.

Answer 1

You can pass the data through perform segue. just change perform segue line with following one:
performSegue(withIdentifier: resultsSegue, sender: objectIdForomParse)
And in your prepare for segue method add following lines:
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == resultsSegue
{
let destination = segue.destination as! ResultsViewController
let objectIDParse = sender as! String
destination.objectIdFromQueryVC = objectIDParse
}
}
}
Perform segue when your error is nil since you are setting objectIdForomParse
only when your error is nil.
Update :
#IBAction func makeQueryButtonTapped(_ sender: UIButton) {
makeSearchObject.saveInBackground { (success, error) in
if error == nil {
if let getObjectId = makeSearchObject.objectId {
self.objectIdFormParse = getObjectId
print("objectId in queryVC: \(self.objectIdForomParse)")
performSegue(withIdentifier: resultsSegue, sender: self)
}
//Successfully saved
} else {
//Error, check error
}
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == resultsSegue
{
let destination = segue.destination as! ResultsViewController
destination.objectIdFromQueryVC = objectIdForomParse
}
}
}