CODEWITHSUNDEEP
iosswift3
Shilpa Kakodkar
Shilpa Kakodkar

Reputation: 19

present(_:animated:completion:) not working in Swift 3

So, when I try to use the present() function in Swift, it always crashes. Here's my code

func infoOpener(sender: UISwipeGestureRecognizer) {

    let location: CGPoint = sender.location(in: tableView)

    let cellPath: IndexPath = tableView.indexPathForRow(at: location)!


    let VC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "userInfo") as! userInfoVC

    VC.username = "@\(self.user[cellPath.row].username)"
    VC.imageUrl = self.user[cellPath.row].imagePath


    self.present(VC, animated: false, completion: nil)

}

Whenever I use the present(_:animated:completion:) function, I get an EXC_BREAKPOINT error. Can somebody help me out?

Upvotes: 1

Views: 2403

Answers (3)

Emil
Emil

Reputation: 205

You say your error is: "fatal error: unexpectedly found nil while unwrapping an Optional value" The problem is probably not with present() method but some IBOutlet or variable on your ViewController. Check all your outlets are connected properly or that what you are setting on "username" and "imageURL" is not nil if this variables do not accept nil.

Upvotes: 0

redent84
redent84

Reputation: 19239

Use if let or guard let instead of force unwrapping Optionals with ! to make your code more robust:

func infoOpener(sender: UISwipeGestureRecognizer) {

    let location: CGPoint = sender.location(in: tableView)

    guard let cellPath: IndexPath = tableView.indexPathForRow(at: location) else {
       print("No index path found")
       return
    }

    guard let VC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "userInfo") as? userInfoVC else {
        print("View controller could not be instantiated")
        return
    }

    VC.username = "@\(self.user[cellPath.row].username)"
    VC.imageUrl = self.user[cellPath.row].imagePath


    self.present(VC, animated: false, completion: nil)

}

Upvotes: 3

Yogesh Makwana
Yogesh Makwana

Reputation: 448

func infoOpener(sender: UISwipeGestureRecognizer) {

            let location: CGPoint = sender.location(in: tableView)
            let cellPath: IndexPath = tableView.indexPathForRow(at: location)!

            if sender.state == .ended /*present in touch end*/  {
                let VC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "userInfo") as! userInfoVC
                VC.username = "@\(self.user[cellPath.row].username)"
                VC.imageUrl = self.user[cellPath.row].imagePath
                self.present(VC, animated: false, completion: nil)
            }
        }

Upvotes: 0

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