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fix(ios, messaging): register background handler task #4180

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merged 2 commits into from
Aug 31, 2020
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fix(ios, messaging): register background handler task #4180

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725e2e3
Minor fix to handle notifications in background state, now we are reg…
davx1992 Aug 31, 2020
fbebde6
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mikehardy Aug 31, 2020
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13 changes: 13 additions & 0 deletions packages/messaging/ios/RNFBMessaging/RNFBMessaging+AppDelegate.m
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Original file line number Diff line number Diff line change
Expand Up @@ -111,9 +111,22 @@ - (void)application:(UIApplication *)application didReceiveRemoteNotification:(N

if (userInfo[@"gcm.message_id"]) {
if ([UIApplication sharedApplication].applicationState == UIApplicationStateBackground) {
// If app is in background state, register background task to guarantee async queues aren't frozen.
UIBackgroundTaskIdentifier __block backgroundTaskId = [application beginBackgroundTaskWithExpirationHandler:^{
if (backgroundTaskId != UIBackgroundTaskInvalid) {
[application endBackgroundTask:backgroundTaskId];
backgroundTaskId = UIBackgroundTaskInvalid;
}
}];
// TODO add support in a later version for calling completion handler directly from JS when user JS code complete
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t) (25 * NSEC_PER_SEC)), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
completionHandler(UIBackgroundFetchResultNewData);

// Stop background task after the longest timeout, async queue is okay to freeze again after handling period
if (backgroundTaskId != UIBackgroundTaskInvalid) {
[application endBackgroundTask:backgroundTaskId];
backgroundTaskId = UIBackgroundTaskInvalid;
}
});

// TODO investigate later - RN bridge gets invalidated at start when in background and a new bridge created - losing all events
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