All of a sudden... fatal error: unexpectedly found nil while unwrapping an Optional value

[kcfgl]

Love this library. Been using it for a while now, but after upgrading cocoapods and reinstalling all the pods, I know am hitting a strange error. Nothing else has changed, but this is now the issue I'm seeing:

cell.checkmarkIcon.hidden = (indexPath.row == selectedIndexPath) ? false : true

Running XCode 7.3.1 and the latest BTNavigationDropdownMenu

Any idea why this is happening? It could certainly be me, but I haven't been able to solve it for some time. Thanks!

kane

[BrianKopp]

One of those must not be initialized. When is this being called? Before it's UI is initialized?

[kcfgl]

I call setupDropdown() from viewDidLoad()

In setupDropdown() I have this code:

    let items = ["Green Trail", "Orange Trail", "Red Trail", "Yellow Trail"]
    menuView = BTNavigationDropdownMenu(navigationController: self.navigationController, title: "Trails", items: items)
    menuView.cellHeight = 50
    menuView.cellBackgroundColor = self.navigationController?.navigationBar.barTintColor
    menuView.cellSelectionColor = UIColor.cmp_darkHeader()
    menuView.cellTextLabelColor = UIColor.whiteColor()
    menuView.cellTextLabelFont = UIFont(name: "Arvil", size: 22)
    menuView.cellTextLabelAlignment = .Left // .Center // .Right // .Left
    menuView.arrowPadding = 15
    menuView.animationDuration = 0.5
    menuView.maskBackgroundColor = UIColor.blackColor()
    menuView.maskBackgroundOpacity = 0.0
    menuView.didSelectItemAtIndexHandler = {(indexPath: Int) -> () in
        print("Did select item at index: \(indexPath)")
        self.showTrailDetails(indexPath)
    }
    self.navigationItem.titleView = menuView

Nothing has changed at all here or in the way I call it. Thanks for the crazy quick response!

[BrianKopp]

Can you tell which variable is nil that shouldn't be. Try swapping out some of the variables and see which one is the culprit, e.g. let myCell = cell, let myCellImage = cell.checkMarkIcon, etc., and see which one blows it up.

In other parts of the source, I see "cell?.". Maybe the cell isn't initialized when you get here? I haven't updated my code yet so I don't know if I'd be able to reproduce this.

I don't see anything obviously wrong with your setupDropdown(), which is consistent with this being a new issue post-update.

I'm also not a contributor to the repo, just a fellow fan/user like you :-)

[kcfgl]

Thanks for your help, Brian. The community appreciates it!

I'm not sure if this is helpful, but simply commenting out this line eliminates the error.

//cell.checkmarkIcon.hidden = (indexPath.row == selectedIndexPath) ? false : true

For my specific application, not showing the checkmark isn't an issue. In fact I would prefer it that way actually.

I'll keep messing around and see if I see anything else.

Thanks again for your help!

[PhamBaTho]

@kcfgl yeah, the reason is initial title "Trails" is not in the items array. Then, this line of code causes the crash you got: self.selectedIndexPath = (items as! [String]).indexOf(title).

The PR #66 fixed this issues.