Unsubscribing from Common Events in Dynamic Mode

When to Use

You can call unsubscribe() to unsubscribe from a common event that is no longer required in dynamic mode.

Available APIs

How to Develop

1. Import the commonEvent module.

   import commonEvent from '@ohos.commonEventManager';
   

2. Subscribe to an event by following the procedure described in Subscribing to Common Events in Dynamic Mode.

3. Call unsubscribe in CommonEvent to unsubscribe from the common event.

   // The subscriber object is created during event subscription.
   if (subscriber !== null) {
       commonEvent.unsubscribe(subscriber, (err) => {
           if (err) {
               console.error(`[CommonEvent] UnsubscribeCallBack err=${JSON.stringify(err)}`)
           } else {
               console.info(`[CommonEvent] Unsubscribe`)
               subscriber = null
           }
       })
   }