CODEWITHSUNDEEP
iosswift2xcode7uialertcontroller
Heavy Breathing
Heavy Breathing

Reputation: 567

UIAlertcontroller in custom TableViewCell WITH returned value

I've searched similar answers in how to displace an UIAlertController in a TableViewCell via protocols and delegates. I got that part working. But I got two actions in the UIAlertController. One of them confirms an action and returns true, and the other button is cancel and returns false.

I can successfully present the UIAlertController, but the program just runs through my code and ignore the logic in my confirm button. I think this is because the delegate/protocol method runs the delegate method in parallel/asynchronously and doesn't wait for the return value.

Here is my code in my custom TableViewCell:

var unattend: Bool!
let customAlert = UIAlertController(title: "Not going anymore?", message: "Event will disappear from this list, confirm?", preferredStyle: UIAlertControllerStyle.Alert)
let nevermindAction = UIAlertAction(title: "Nevermind", style: UIAlertActionStyle.Default) { (action: UIAlertAction) -> Void in
    unattend = false
}
let unattendAction = UIAlertAction(title: "Confirm unattending", style: UIAlertActionStyle.Destructive) { (action: UIAlertAction) -> Void in
    unattend = true
}
customAlert.addAction(nevermindAction)
customAlert.addAction(unattendAction)

self.delegate.goingCancelled(customAlert, unattend: unattend))

Here is my protocol:

protocol GoingCancelledDelegate {
func goingCancelled(alert: UIAlertController) -> Bool
}

Here is my code in my TableViewController, and yes I did type in the GoingCancelledDelegate in the class definition just didn't copy and paste here:

func goingCancelled(alert: UIAlertController) -> Bool {
    presentViewController(alert, animated: true) { () -> Void in
    }
}

So the alert shows up, but my UITableViewCell code doesn't wait for the return value to process other logic. Any tips/advice/help will be greatly appreciated! Thank you in advance!

Upvotes: 0

Views: 68

Answers (1)

Hamza Ansari
Hamza Ansari

Reputation: 3084

Its because you are calling self.delegate.goingCancelled(customAlert, unattend: unattend)) without confirm action do this:

var unattend: Bool!
 let customAlert = UIAlertController(title: "Not going anymore?", message: "Event will disappear from this list, confirm?", preferredStyle: UIAlertControllerStyle.Alert)
 let nevermindAction = UIAlertAction(title: "Nevermind", style: UIAlertActionStyle.Default) { (action: UIAlertAction) -> Void in
    unattend = false
}
 let unattendAction = UIAlertAction(title: "Confirm unattending", style: UIAlertActionStyle.Destructive) { (action: UIAlertAction) -> Void in
    unattend = true
 self.delegate.goingCancelled(customAlert, unattend: unattend)) 
}
customAlert.addAction(nevermindAction)
customAlert.addAction(unattendAction)

Upvotes: 1

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