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iOS Build a Playlist Browser with Swift Using a Navigation Controller With Segues Modifying the UI

Posted by Soumin Mohanty
Soumin Mohanty
5,067 Points

Want to pass a image to destination view controller in the prepareForSegue

I am trying out a few things here. I want to pass a image to destination view controller in the prepareForSegue. In the destinationVC, image view is a iboutlet. This throws an error detailVC.detailImage.image = UIImage(named: "helmet")! as fatal error: unexpectedly found nil while unwrapping an Optional value

However in the source view controller I have a image and I am able to initialize it in view did load with imageView.image = UIImage(named: "helmet")!

How does this work!!!!

agreatdaytocode
agreatdaytocode
24,757 Points

Hello Soumin can you share the code with us?

Soumin Mohanty
Soumin Mohanty
5,067 Points

Here is the code

class ViewController: UIViewController {

@IBOutlet weak var imageView: UIImageView!
override func viewDidLoad() {
    super.viewDidLoad()
    imageView.image = UIImage(named: "helmet")!
}

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

@IBAction func launchDetail(sender: AnyObject) {
    self.performSegueWithIdentifier("showDetailSegue", sender: nil)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "showDetailSegue" {
       var detailVC = segue.destinationViewController as DetailViewController
       var image = UIImage(named: "helmet")!
        detailVC.detailImage.image = UIImage(named: "helmet")!
    }
}

}