我正在使用以下 CKNotification 信息，这似乎工作正常：
CKNotificationInfo *note = [[CKNotificationInfo alloc] init];
note.alertBody = @"Something Happened";
note.shouldBadge = NO;
note.shouldSendContentAvailable = NO;
当 iOS 设备发生变化时，我的 Mac 应用会收到基于订阅的推送通知，其中包含此通知。但是，didReceiveRemoteNotification 从未被调用，因此我无法处理该事件。我需要能够刷新和获取新的更改。我该怎么做？
【问题讨论】：
标签： macos cocoa icloud cloudkit osx-yosemite
调用registerForRemoteNotificationTypes: 并实现didRegisterForRemoteNotificationsWithDeviceToken:
应该是足够的代码，并且 App ID 应该包含 Push Notifications 服务。
我在跨平台 (iOS/OS X) 应用程序中使用 CloudKit 在设备之间同步收藏夹，如下所示：
// OS X specific code
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
[NSApp registerForRemoteNotificationTypes:NSRemoteNotificationTypeNone];// silent push notification!
}
- (void)application:(NSApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
[self.favCon handleCloudKitNotificationWithUserInfo:userInfo];
}
注意NSRemoteNotificationTypeNone 的用法，这意味着静默推送通知！这就是我在 FavController 类中设置 CloudKit 的方式：
- (void)getOrCreateFavZoneWithCompletionHandler:(successCompletionHandler)handler {
// check if FavZone exists op
__block int createZone = 0;
CKFetchRecordZonesOperation *fetchRecZonesOp = [[CKFetchRecordZonesOperation alloc] initWithRecordZoneIDs:@[[FavController favRecordZoneID]]];
CKModifyRecordZonesOperation *saveRecZoneOp = [[CKModifyRecordZonesOperation alloc] initWithRecordZonesToSave:nil recordZoneIDsToDelete:nil];
fetchRecZonesOp.fetchRecordZonesCompletionBlock = ^(NSDictionary *recordZonesByZoneID, NSError *operationError) {
if (recordZonesByZoneID.count == 0) {// zone doesn't exist
createZone = 1;
CKRecordZone *favZone = [[CKRecordZone alloc] initWithZoneName:UTXAFavZoneName];
saveRecZoneOp.recordZonesToSave = @[favZone];
NSLog(@"Creating new Zone %@", favZone.zoneID.zoneName);
} else {
NSLog(@"Zone %@ already exists.", [FavController favRecordZoneID].zoneName);
}
};
// create FavZone op
saveRecZoneOp.modifyRecordZonesCompletionBlock = ^(NSArray *savedRecordZones, NSArray *deletedRecordZoneIDs, NSError *operationError) {
[self successCompletionHandler:(savedRecordZones.count == createZone) error:operationError informDelegate:YES handler:handler];
};
[saveRecZoneOp addDependency:fetchRecZonesOp];
[[FavController favDatabase] addOperation:fetchRecZonesOp];
[[FavController favDatabase] addOperation:saveRecZoneOp];
}
- (void)subscribeToFavChanges:(successCompletionHandler)handler {
// get current subscription
[[FavController favDatabase] fetchSubscriptionWithID:UTXAFavConCKSubscriptionID completionHandler:^(CKSubscription *subscription, NSError *error) {
if (subscription) {
NSLog(@"using existing subscription: %@", subscription);
[self successCompletionHandler:YES error:nil informDelegate:NO handler:handler];
} else {
CKSubscription *sub = [[CKSubscription alloc] initWithZoneID:[FavController favRecordZoneID]
subscriptionID:UTXAFavConCKSubscriptionID
options:0];// "You must specify 0 for this parameter. Zone subscriptions currently do not support any options."
[[FavController favDatabase] saveSubscription:sub completionHandler:^(CKSubscription *subscription, NSError *error) {
NSLog(@"created new subscription: %@ %@", subscription, error);
[self successCompletionHandler:(error == nil) error:error informDelegate:YES handler:handler];
}];
}
}];
}
只要我在一个设备上添加或删除记录，我就会在所有其他设备上收到通知，我会在 FavController 类中这样处理：
/// @abstract Handle push notifications sent by iCloud.
/// @discussion App delegates call this method when they receive a push notification through didReceiveRemoteNotification.
/// Currently, only airport favorites produce a PN, it is of type CKNotificationTypeRecordZone.
/// @param userInfo The userInfo dict tied to each push notification.
- (void)handleCloudKitNotificationWithUserInfo:(NSDictionary *)userInfo {
[self recursivelyCheckForPreviousCloudKitNotifications];
}
- (void)recursivelyCheckForPreviousCloudKitNotifications {
CKFetchNotificationChangesOperation *fetchOp = [[CKFetchNotificationChangesOperation alloc] initWithPreviousServerChangeToken:_defCon.notificationChangeToken];
__weak CKFetchNotificationChangesOperation *weakOp = fetchOp;
fetchOp.notificationChangedBlock = ^(CKNotification *notification) {
[self handleNotification:notification];
};
fetchOp.fetchNotificationChangesCompletionBlock = ^( CKServerChangeToken *serverChangeToken, NSError *operationError) {
NSLog(@"new notification change token: %@", serverChangeToken);
_defCon.notificationChangeToken = serverChangeToken;
if (weakOp.moreComing) {
NSLog(@"more coming!!");
[self recursivelyCheckForPreviousCloudKitNotifications];
} else {
NSLog(@"done handling notification changes.");
}
};
[[FavController favContainer] addOperation:fetchOp];
}
- (void)handleNotification:(CKNotification *)notification {// withCompletionHandler:(successCompletionHandler)handler {
if (notification.notificationType == CKNotificationTypeRecordZone) {// make sure we handle only zone changes
CKRecordZoneNotification *noti = (CKRecordZoneNotification *)notification;
if ([noti.recordZoneID.zoneName isEqualToString:[FavController favRecordZoneID].zoneName]) {
// received an update for the fav zone
[self queuedFavUpdateFromCloud];
} else {
// received an update for an unknown zone
NSLog(@"WARNING: received an update for an unknown zone: %@", noti.recordZoneID.zoneName);
}
} else {
NSLog(@"WARNING: received unknown notification: %@", notification);
}
}
【讨论】：
didReceiveRemoteNotification 被调用！
好吧，我终于想通了。如果您使用 CKNotificationInfo 作为警报，除非您将 CKNotificationInfo.soundName 设置为空字符串，否则在 Mac 上不会调用 didReceiveRemoteNotification！这看起来只是 OS X（目前是 10.10 和 10.11）中的一个错误，但可以通过这个简单的更改来解决。
【讨论】：