RetainCycle when select case "case viewController(_: UIViewController)"

[VladislavHERZ]

Select "case viewController(_: UIViewController)", and set duration == .forever. When dismiss or pop vc, we get retain cycle.

[wtmoose]

If you say .forever, it is up to you to call `hide at some point. Are you expecting it to auto-detect when you’re finished with the view and auto-hide?

[VladislavHERZ]

Yes, when vc will be destroyed, need to destroy view(Alert), this process should be automatically. Alert don't should keep vc.

[wtmoose]

I'll think about it. in the meantime, you can call hide in your view controller's disappearance method.

[wtmoose]

Assuming I make this a weak reference, SwiftMessages still needs to update it's internal bookkeeping in order to present the next message in the queue via some kind of auto-dismiss based on the VC being deallocated. How would you propose that SwiftMessages detects when your view controller is deallocated?

[VladislavHERZ]

Try this, but this code will be work only with vc.

struct WeakVCWrapper<Element:UIViewController> {
    weak var value:Element?

    init(_ value:Element) {
        self.value = value
    }
}

Or

struct WeakWrapper<Element:AnyObject> {
    weak var value:Element?

    init(_ value:Element) {
        self.value = value
    }
}

But you will need to cast to your type class use "as?".

[wtmoose]

The question was how would you propose detecting when the view controller is deallocated (not how to make a weak reference)? As I said, SwiftMessages needs to update its internal bookkeeping when the VC is deallocated in order to show the next message.