Actions do not work on fresh install due to conflict with the cordova-plugin-firebase

Provide a general summary of the issue.

Your Environment

• Plugin version: 0.9.0-beta1
• Platform: iOS
• OS version: iOS 10.3.3
• Device manufacturer / model: iPhone 6S
• Cordova version (cordova -v): 7.1.0
• Cordova platform version (cordova platform ls): ios 4.4.0
• Plugin config None
• Ionic Version (if using Ionic) Not using it

Expected Behavior

Action always works.

Actual Behavior

Action doesn’t work if app is first installed.

Steps to Reproduce

1. Install app
2. Send a notification with action
3. Notification appears, action button appears
4. Touch the button and nothing happened.

Context

Actually I already know what is going on. This plugin is in conflict with cordova-plugin-firebase at least version 0.1.24. Both are trying to be delegate for UNUserNotificationCenter. But only one can be at a time. Launching with a fresh install, perhaps I let Firebase ask for permission first, and this plugin lose the delegate status for UNUserNotificationCenter. Subsequent launches do ensure this plugin is the delegate.

This is actually a tricky issue. I don’t know what should really be done in this case. Maybe two plugin should actually be a single plugin?

Debug logs

None necessary.

[katzer]

I hope this change might help to improve the situation where multiple classes would like to listen for the same delegate. https://github.com/katzer/cordova-plugin-local-notifications/commit/641ff31a67236fd1db5add911d8fae2047552925

[t2wu]

For the moment since I only uses actions for local notifications, I changed APPLocalNotification.m so that it will always reclaim as the delegate when scheduling a notification event. Obviously this is not really satisfactory but it works for my purpose.

- (void) schedule:(CDVInvokedUrlCommand*)command
{
    NSArray* notifications = command.arguments;

    // Add the following hack:
    UNUserNotificationCenter.currentNotificationCenter.delegate = self;

    . . .
}