CODEWITHSUNDEEP
swiftswift2
Andrew Garcia
Andrew Garcia

Reputation: 3

Dismiss Alert Programmatically Swift

I need a little help with a UIAlert. I get an error "UIAlertController can only have one action with a style of UIAlertActionStyleCancel". I know it is because I am initiating this alert outside of the function, but unsure how to fix it. How can I get access to the alert within the if blah < 80 { conditional?

let alertView = UIAlertController(title: "Blah", message: "", preferredStyle: UIAlertControllerStyle.Alert)
@IBAction func blahButtonPressed(sender: AnyObject) {        

        alertView.addAction(UIAlertAction(title: "Do Something", style: .Default, handler: { (action: UIAlertAction!) in
            // I have code here
        }))

        alertView.addAction(UIAlertAction(title: "Do Something 2", style: .Default, handler: { (action: UIAlertAction!) in
            // I have code here
        }))

        alertView.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler: { (action: UIAlertAction!) in
            // I have code here
        }))

        presentViewController(alertView, animated: true, completion: nil)

}

Later in the code I get values via Bluetooth and need to dismiss the Alert if a value is below 80.

if blah < 80 {
alertView.dismissViewControllerAnimated(true, completion: nil)
}

Upvotes: 0

Views: 890

Answers (2)

Ike10
Ike10

Reputation: 1595

I'm not 100% but does it work when you only press the button once? If so, then it may be because you are adding the actions to your alertView inside the @IBAction. Instead, you may want to try moving the addition of the UIAlertAction's outside of the @IBAction and only presenting the alert view inside of it. Like so: 

let alertView = UIAlertController(title: "Blah", message: "", preferredStyle: UIAlertControllerStyle.Alert)
alertView.addAction(UIAlertAction(title: "Do Something", style: .Default, handler: { (action: UIAlertAction!) in
        // I have code here
    }))

alertView.addAction(UIAlertAction(title: "Do Something 2", style: .Default, handler: { (action: UIAlertAction!) in
        // I have code here
    }))

alertView.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler: { (action: UIAlertAction!) in
        // I have code here
    }))

@IBAction func blahButtonPressed(sender: AnyObject) {
  presentViewController(alertView, animated: true, completion: nil)
}

This way the UIAlertAction's don't get added every single time the "blahButton" is pressed (which would result in more than one UIAlertAction with style of "UIAlertActionStyleCancel")

Upvotes: 2

KotaBear233
KotaBear233

Reputation: 163

Here is how I fixed it if anyone comes accross this. 

var newAlert: AnyObject?


@IBAction func blahButtonPressed(sender: AnyObject) {        
    let alertView = UIAlertController(title: "Blah", message: "", preferredStyle: UIAlertControllerStyle.Alert)
    alertView.addAction(UIAlertAction(title: "Do Something", style: .Default, handler: { (action: UIAlertAction!) in
        // I have code here
    }))

    alertView.addAction(UIAlertAction(title: "Do Something 2", style: .Default, handler: { (action: UIAlertAction!) in
        // I have code here
    }))

    alertView.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler: { (action: UIAlertAction!) in
        // I have code here
    }))

   newAlert = alertView

        presentViewController(alertView, animated: true, completion: nil) 
}

// When I need to close. If blah is below 80

if blah < 80 {
    if let newAlertView = newAlert as? UIAlertController {
       newAlertView.dismissViewControllerAnimated(true, completion: nil)
    }
}

Upvotes: 0

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