I'm assuming you've initialized snackbar inside a class func or something like that. From this place self represents your class DetailsInfoViewController while you need the object of this class. If you initialize this object before snackbar, you could write like this:
let controller: DetailsInfoViewController = ...
let snackbar = TTGSnackbar(message: "Attendance Update !", duration: .long, actionText: "SEND") { [weak controller] (snackbar) in
controller?.uncheck()
print("snack bar Action")
}
If it doesn't help you, please post the function code where you're creating snackbar.
UPD:
With minimal changes of your code the following solution should work:
class DetailsInfoViewController: UIViewController {
var snackbarCount = 0
lazy var snackbar = TTGSnackbar(message: "Attendance Update !", duration: .long, actionText: "SEND") { (snackbar) in
self.uncheck()
print("snack bar Action")
}
func uncheck() {
print("snackbar uncheck function")
snackbarCount -= 1
checkSnackBar()
}
func checkSnackBar() {}
}
You found really tricky situation when your class requires self inside closure as it initializes but this snackbar variable initializes before we have ready-to-use self variable. It means we need to initialize snackbar after self using lazy var.
But I strongly suggests you to not write code as you wrote it. The TTHSnackbar author's example is designed to be placed in a function when this snackbar really need to be shown. For example:
class DetailsInfoViewController: UIViewController {
@IBAction func showSnackbarButtonTapped(_ sender: UIButton) {
let snackbar = TTGSnackbar(message: "TTGSnackBar !", duration: .middle, actionText: "Action!") { (snackbar) in
self.uncheck()
print("snack bar Action")
}
snackbar.show()
}
}
When it shows on the view it will be retained by this view.
UPD #2:
To show only one Snackbar at a time you could write like this:
class DetailsInfoViewController: UIViewController {
private weak var currentSnackbar: TTGSnackbar?
@IBAction func showSnackbarButtonTapped(_ sender: UIButton) {
if let snackbar = currentSnackbar {
snackbar.dismiss()
currentSnackbar = nil
}
let snackbar = TTGSnackbar(message: "TTGSnackBar !", duration: .middle, actionText: "Action!") { (snackbar) in
self.uncheck()
print("snack bar Action")
}
currentSnackbar = snackbar
snackbar.show()
}
}
