cloudkit

问题 I might be missing something obvious here. How would one create a CloudKit notification with detail about the CKRecord that you are being notified about? (i.e. not just a generic "New Item Created!" but a notification with the title of the record for instance, like, "Jill and Jessica's Birthday Party!") Is the proper way to do this to create a new subscription with a new notification.alertBody for every new record change? That doesn't make any sense. That leaves the option queryNotification

问题 Is there any way to limit the amount of results that are returned in a CKQuery ? In SQL , it is possible to run a query like SELECT * FROM Posts LIMIT 10,15 . Is there anything like the last part of the query, LIMIT 10,15 in CloudKit? For example, I would like to load the first 5 results, then, once the user scrolls down, I would like to load the next 5 results, and so on. In SQL, it would be LIMIT 0,5 , then LIMIT 6,10 , and so on. One thing that would work is to use a for loop, but it would

问题 I am having this issue where I save something to the icloud using CloudKit but immediately fetching the results doesn't return the latest data inserted. Example let todoRecord = CKRecord(recordType: "Todos") todoRecord.setValue(todo, forKey: "todotext") publicDB.saveRecord(todoRecord, completionHandler: { (record, error) -> Void in NSLog("Saved in cloudkit") let predicate = NSPredicate(value: true) let query = CKQuery(recordType: "Todos", predicate: predicate) self.publicDB.performQuery(query

问题 I have a "table" that can potentially have many records, when adding a new record I need to know how many records there already are in current table as I use it in calculation of some values. The closest thing I could find is requesting all entries like this: var query : CKQuery = CKQuery(recordType: "Stars", predicate: NSPredicate(format: "mass > 0")) var request : CKQueryOperation = CKQueryOperation(query: query) var starCount = 0 request.queryCompletionBlock = { (cursor:CKQueryCursor!,

问题 When I receive a remote notification on a record addition (didReceiveRemoteNotification called), I get the following error message: _BSMachError: (os/kern) invalid capability (20) I've already tried to find out more about this in forums and via Google but I could not find any helpful advice that applies to my situation. What does the error message mean? What can I do about it? 回答1: I just experienced this error. I was in a UIAlert Action block; when the block exited the error occurred (BTW

问题 One of my users deleted their cloud data, and now they are getting a "Zone was purged by the user" message. I believe it is returning error CKErrorUserDeletedZone, when fetching the zone. The documentation states the following: The user deleted this zone through the settings UI. Your client should either remove its local data or prompt the user before attempting to re-upload any data to this zone. */ It is not clear whether I should delete the zone and create it again. Has anyone gone through

问题 I am working on developing an app that uses CloudKit to store and retrieve image files as CKAsset objects. Normally, this works great and I love CloudKit's small learning curve. Periodically though, I have this peculiar issue where an image is being stored either totally upside-down, or 90º to the left or to the right. Here is an example of an image that was stored improperly: I took that picture with my iPhone 5s, in portrait orientation (I didn't save the original image to my device, as I

问题 I am using Swift for an iOS app. I need to store a DateComponents object as a field in CloudKit. How would I do that? So far I think I need to set the CloudKit field to type Bytes, and convert the DateComponents object to a Data object. Looking at the documentation for the Data class, I can't figure out how to initialize the Data object. I have no idea how to use the UnsafeBufferPointer used in one of the initializers. The following code gives a runtime error: newRecord.setObject(

问题 I'm making a CloudKit app, and I'm faced with the choice of storing my data in the default container, accessible only by that app, or a custom container that can share data. For now I only need that app to access the data, so I would probably put my data in the default container. However, if eventually I want to access this data from a different app, can I transfer my user data to a custom, shareable container? 回答1: No need to transfer your data: the default container can be used from your

问题 I am curious wether user can somehow change discoverability permission. I haven't found a way in Settings. 回答1: You can set it on your device in Settings / iCloud / iCloud Drive / Find via Email 来源： https://stackoverflow.com/questions/26883345/how-can-user-discoverability-permission-revoked-in-cloudkit