@nativescript/shared-notification-delegate
v1.0.2
Published
Shared delegate helper for iOS.
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Nativescript Shared Notification Delegate
This project aims to prevent the shortcomings that come from the iOS implementation of only allowing a single delegate.
Installation
ns plugin add @nativescript/shared-notification-delegate
Usage
Import SharedNotificationDelegate
and add Observers
import { SharedNotificationDelegate } from '@nativescript/shared-notification-delegate';
...
SharedNotificationDelegate.addObserver({
delegateUniqueKey: "myUniqueKey", // ensures uniqueness, if not set or is null/undefined, allows multiple of the same
userNotificationCenterWillPresentNotificationWithCompletionHandler: (notificationCenter, notification, handler, stop, next) => {
console.log("notification received by observer");
// is this notification something I should handle?
if (shouldHandleThis) {
// do stuff
// intercept it and show alert
handler(UNNotificationPresentationOptions.Alert);
return;
}
// not mine, next should handle
next();
}
});
API
SharedNotificationDelegate Methods
| Method | Description |
| --- | --- |
| addObserver(observer: DelegateObserver
, priority?: number
): void
| Adds a delegate observer of a certain priority (lower means first). Default priority is 100. |
| removeObserver(observer: DelegateObserver
) | removes a DelegateObserver |
| removeObserverByUniqueKey(key: any
) | removes a DelegateObserver by its unique key |
DelegateObserver Interface
A DelegateObserver can implement 3 methods from UNUserNotificationCenterDelegate
with the addition of some details:
interface DelegateObserver {
userNotificationCenterDidReceiveNotificationResponseWithCompletionHandler?(center: any /* UNUserNotificationCenter */, response: any /* UNNotificationResponse */, completionHandler: () => void, next: () => void): void;
userNotificationCenterOpenSettingsForNotification?(center: any /* UNUserNotificationCenter */, notification: any /* UNNotification */, stop: () => void, next: () => void): void;
userNotificationCenterWillPresentNotificationWithCompletionHandler?(center: any /* UNUserNotificationCenter */, notification: any /* UNNotification */, completionHandler: (p1: any /* UNNotificationPresentationOptions */) => void, next: () => void): void;
/**
* if set to not null/undefined, will ensure only one is registered
*/
delegateUniqueKey?: any;
}
All the functions are called asynchronously in a chain.
Calling a completionHandler
immediately stops the observer chain. next()
must be called if the method will not be handling the notification.
Calling stop()
on userNotificationCenterOpenSettingsForNotification
prevents the event bubbling to the rest.
Only one method will be processed at a time, this means you can take as long as you want (including making http calls, for example), as long as you just call completionHandler
, stop
and next
when you're finished.
If a DelegateObserver has a delegateUniqueKey
, the SharedNotificationDelegate
will ensure only the latest copy of the observer is present. This is especially useful if debugging with HMR, which may add multiple observers on application reload.
License
Apache License Version 2.0, January 2004