performing Segue is crashing in iOS 10

Question

I have a project in swift 2.3 in Xcode 8.2 beta, This project run nicely in iOS < 10, but when I run iOS 10 this project crash with no reason preforming the segue. shows this error:

fatal error: unexpectedly found nil while unwrapping an Optional value

this is the code line

NSOperationQueue.mainQueue().addOperationWithBlock {
     self.performSegueWithIdentifier("goToActivityDetail", sender: nil)
}

I don'w know whats happened, but is not even call the method

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

please help me! I'm desperate with the compatibility between iOS 10 and Swift 2.3 or iOS 9.3 and Swift 3

Did you make sure you storyboard segue is set to modal presentation? — cloudcal, Dec 12 '16 at 21:00

score 0 · Answer 1 · answered Dec 12 '16 at 19:33

0

your segue "goToActivityDetail" exist in the storyboard? and when you add the override you are setting the type of your controller? some like this:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "goToActivityDetail"{
            let v = segue.destinationViewController as! yourControllerName
        }
    }

answered Dec 12 '16 at 19:33

cristian franco

266
2
13

yes, the segue name is "goToActivityDetail", the problem comes before the prepareForSegue, because this method is never called – Kristian Sthefan Cortes Prieto Dec 12 '16 at 20:23
make sure that your segue si in the storyboard – cristian franco Dec 12 '16 at 22:58

performing Segue is crashing in iOS 10

1 Answers1