I'm by no means an expert but if I understand what you're trying to do, I think
the approach I would take is to make an extension on UIViewController:
extension UIViewController {
func notificationAlert(_ msg1: String, _ msg2: String) {
// create the UIAlertAlertController
// and then do as David Duncan said and do:
self.present(<alert controller>, animated: <true/false> completion: …)
}
}
Now all your UIViewController subclasses can call that method (and because it's
a method, they have access to self which is a subclass of UIViewController).
HTH,
Dave
> On Sep 30, 2019, at 11:27 PM, Doug Hardie via Cocoa-dev
> <cocoa-dev@lists.apple.com> wrote:
>
> I tried that and swift complains that self is not defined. This is not in a
> view controller but a stand alone function used in many view controllers.
> Generally it is used during a segue, but I added one in a view controller to
> a button action, not part of a segue and it dismissed the alert also.
>
> -- Doug
>
>> On 30 September 2019, at 19:48, David Duncan <david.dun...@apple.com> wrote:
>>
>> Instead of creating a new window and a root view controller in order to
>> present your alert, just use (assuming self is a UIViewController)
>> self.present(<alert controller>, animated: <true/false> completion: …)
>>
>>> On Sep 30, 2019, at 5:48 PM, Doug Hardie <bc...@lafn.org> wrote:
>>>
>>> Not sure how to do that. It's not in any view controller as it is used in
>>> virtually all of the various view controllers. That's why I wanted it as a
>>> function.
>>>
>>> -- Doug
>>>
>>>> On 30 September 2019, at 14:44, David Duncan <david.dun...@apple.com>
>>>> wrote:
>>>>
>>>> What happens if you present it over your normal view controller hierarchy
>>>> instead of using another window?
>>>>
>>>> Has your application adopted UIWindowScene?
>>>>
>>>>> On Sep 30, 2019, at 5:36 PM, Doug Hardie via Cocoa-dev
>>>>> <cocoa-dev@lists.apple.com> wrote:
>>>>>
>>>>> I have some code that presents an alert to the user with information they
>>>>> need, and an OK button to clear it. It works fine in the previous Xcode
>>>>> versions. However, after upgrading to 11, it now displays the alert and
>>>>> then immediately clears it. This happens both in the simulator and on a
>>>>> real device. I have played around with the code and can't figure out how
>>>>> to make it leave the alert on the screen. This is in Swift. It is a
>>>>> function that is called from numerous places in the app.
>>>>>
>>>>> func NotificationAlert (_ msg1: String, _ msg2: String) {
>>>>> let ErrorAlert = UIAlertController(title: msg1, message: msg2,
>>>>> preferredStyle: .alert)
>>>>> let dismiss = UIAlertAction(title: "Ok", style: .default, handler: nil)
>>>>> ErrorAlert.addAction(dismiss)
>>>>> ErrorAlert.presentInOwnWindow(animated: true, completion: nil)
>>>>> }
>>>>>
>>>>> extension UIAlertController {
>>>>> func presentInOwnWindow(animated: Bool, completion: (() -> Void)?) {
>>>>> let alertWindow = UIWindow(frame: UIScreen.main.bounds)
>>>>> alertWindow.rootViewController = UIViewController()
>>>>> alertWindow.windowLevel = UIWindow.Level.alert + 1;
>>>>> alertWindow.makeKeyAndVisible()
>>>>> alertWindow.rootViewController?.present(self, animated: animated,
>>>>> completion: completion)
>>>>> }
>>>>> }
>>>>>
>>>>>
>>>>> -- Doug
>>>>>
>>>>> _______________________________________________
>>>>>
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>>>>
>>>
>>
>
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