I'm making an app with HealthKit and want to try to add a swipe to delete on my table view. I know there is a healthStore.delete option, but will this delete from the Health app and how would I know which HKSample to delete from HealthKit.
The HKSample class is an abstract class. Thus you should should never instantiate a HKSample object directly. Instead, you always work with one of the subclasses of HKSample (HKCategorySample, HKQuantitySample, HKCorrelation, or HKWorkout classes) where HKSampleClass1 would be one of the subclasses.
healthStore.deleteObject(HKSampleClass1) { (success: Bool, error: NSError?) -> Void in {
if success () {
//success in deletion
}
}}
In the first step, you need to define your specific key in HKMetadataKeySyncIdentifier before you save your data to apple health.
And then, you can use HKMetadataKeySyncIdentifier to delete specific health data.
let healthKitStore = HKHealthStore()
// SAVE
var meta = [String: Any]()
meta[HKMetadataKeySyncVersion] = 1
meta[HKMetadataKeySyncIdentifier] = "specific key"
let recordSample = HKQuantitySample(type: type, quantity: quantity, start: date, end: date, metadata: meta)
healthKitStore.save(bloodGlucoseSample) { success, error in
if success {
print("saving record to health success")
} else {
print("saving record to health error = \(String(describing: error))")
}
}
// DELETE
let predicate = HKQuery.predicateForObjects(withMetadataKey: HKMetadataKeySyncIdentifier, allowedValues: ["specific key"])
healthKitStore.deleteObjects(of: bloodGlucoseType, predicate: predicate) { success, _, error in
if success {
print("delete health record success")
} else {
print("delete health record error = \(String(describing: error))")
}
}
Yes, calling healthStore.deleteObject() will delete the sample from Health. However, keep in mind that your app may only delete samples that it saved to HealthKit.
You'll need to perform a query to retrieve the samples you want to show to the user. You could use HKSampleQuery or HKAnchoredObjectQuery.
Related
Background Info
I have a main application, which writes a single entry to a database contained in an App Group (we'll call them "DB1", and "Group1", respectively). To the same project, I have added an iOS 14 Home Screen Widget extension. This extension is then added to Group1.
All three sizes (small, medium, large) show the same information from the DB1 entry, just rearranged, and for the smaller widgets, some parts omitted.
Problem
The problem is, if I have multiple instances of the widget (say a small and a medium), then when I rebuild the target, and it loads/runs, I get CoreData errors such as the following:
<NSPersistentStoreCoordinator: 0x---MEM--->: Attempting recovery from error encountered during addPersistentStore: Error Domain=NSCocoaErrorDomain Code=134081 "(null)" UserInfo={NSUnderlyingException=Can't add the same store twice}
Relevant Code
Here's the code for the Timeline function
public func timeline(with context: Context, completion: #escaping (Timeline<Entry>) -> ()) {
//Set up widget to refresh every minute
let currentDate = Date()
let refreshDate = Calendar.current.date(byAdding: .minute, value: 1, to: currentDate)!
WidgetDataSource.shared.loadTimelineEntry { entry in
guard let e = entry else { return }
let entries: [TimelineEntry] = [e]
let timeline = Timeline(entries: entries, policy: .after(refreshDate))
completion(timeline)
}
}
And here is the loadTimelineEntry function
(persistentContainer gets initialized in the init() of WidgetDataSource, the class that holds loadTimelineEntry function)
func loadTimelineEntry(callback: #escaping (TimelineEntry?) -> Void) {
persistentContainer.loadPersistentStores(completionHandler: { (storeDescription, error) in
print("Loading persistent stores")
var widgetData: [WidgetData]
if let error = error {
print("Unresolved error \(error)")
callback(nil)
} else {
let request = WidgetData.createFetchRequest()
do {
widgetData = try self.persistentContainer.viewContext.fetch(request)
guard let data = widgetData.first else { callback(nil); return }
print("Got \(widgetData.count) WidgetData records")
let entry = TimelineEntry(date: Date())
callback(entry)
} catch {
print("Fetch failed")
callback(nil)
}
}
})
}
What I've Tried
Honestly, not much. I had gotten this same error before I put the widget into the Group1. That time it was due to the main app already having DB1 created on it's first run, then on the subsequent widget run, it looked in it's own container, didn't find it, and attempted to create it's own DB1, and the OS didn't let it due to them having the same name.
Widgets being a fairly new feature, there are not many questions regarding this specific use case, but I'm sure someone out there has a similar setup. Any help or tips will be highly appreciated!
Thanks to Tom Harrington's comment, I was able to solve the warnings by adding a check at the top of my loadTimelineEntry function like so:
if !persistentContainer.persistentStoreCoordinator.persistentStores.isEmpty {
//Proceed with fetch requests, etc. w/o loading stores
} else {
//Original logic to load store, and fetch data
}
I'm trying to get the users first name using cloud kit however the following code is not getting the users first name and is leaving firstNameFromFunction variable empty. Does anyone know how to achieve this in iOS 10?
let container = CKContainer.default()
container.fetchUserRecordID { (recordId, error) in
if error != nil {
print("Handle error)")
}else{
self.container.discoverUserInfo(
withUserRecordID: recordId!, completionHandler: { (userInfo, error) in
if error != nil {
print("Handle error")
}else{
if let userInfo = userInfo {
print("givenName = \(userInfo.displayContact?.givenName)")
print("familyName = \(userInfo.displayContact?.familyName)")
firstNameFromFunction = userInfo.displayContact?.givenName
}else{
print("no user info")
}
}
})
}
}
the permission screen that comes up when asking for the first time, IMO, is very poorly worded. They need to change that. It says "Allow people using 'your app' to look you up by email? People who know your email address will be able to see that you use this app." This make NO sense. This has nothing to do with asking the user to get their iCloud first name, last name, email address.
Speaking of email address - this and the phone number from the lookupInfo property is missing - i.e. set to nil, even though those values are legit and correct. Filing a bug tonight.
First, you will need to request permission to access the user's information.
Then, you can use a CKDiscoverUserIdentitiesOperation. This is just like any other CKOperation (eg. the modify record operation). You just need to create a new operation with the useridentitylookupinfo. Then you will also need to create a completion block to handle the results.
Here is an example function I created:
func getUserName(withRecordID recordID: CKRecordID,
completion: #escaping (String) -> ()) {
if #available(iOS 10.0, *) {
let userInfo = CKUserIdentityLookupInfo(userRecordID: recordID)
let discoverOperation = CKDiscoverUserIdentitiesOperation(userIdentityLookupInfos: [userInfo])
discoverOperation.userIdentityDiscoveredBlock = { (userIdentity, userIdentityLookupInfo) in
let userName = "\((userIdentity.nameComponents?.givenName ?? "")) \((userIdentity.nameComponents?.familyName ?? ""))"
completion(userName)
}
discoverOperation.completionBlock = {
completion("")
}
CKContainer.default().add(discoverOperation)
} else {
// iOS 10 and below version of the code above,
// no longer works. So, we just return an empty string.
completion("")
}
}
First you need to ask the user for permission to be discovered.
Use CKContainer.default().requestApplicationPermission method passing .userDiscoverability on applicationPermission parameter.
The CKContainer.default().discoverUserInfo method is deprecated on iOS 10. Instead use CKContainer.default().discoverUserIdentity method.
Do something like:
CKContainer.default().requestApplicationPermission(.userDiscoverability) { (status, error) in
CKContainer.default().fetchUserRecordID { (record, error) in
CKContainer.default().discoverUserIdentity(withUserRecordID: record!, completionHandler: { (userIdentity, error) in
print("\(userIdentity?.nameComponents?.givenName)")
print("\(userIdentity?.nameComponents?.familyName)")
})
}
}
I am having trouble understanding some of the CloudKit sharing concepts and the WWDC 2016 "What's new in CloudKit" video doesn't appear to explain everything that is required to allow users to share and access shared records.
I have successfully created an app that allows the user to create and edit a record in their private database.
I have also been able to create a Share record and share this using the provided sharing UIController. This can be successfully received and accepted by the participant user but I can't figure out how to query and display this shared record.
The app creates a "MainZone" in the users private database and then creates a CKRecord in this "MainZone". I then create and save a CKShare record and use this to display the UICloudSharingController.
How do I query the sharedDatabase in order to access this record ? I have tried using the same query as is used in the privateDatabase but get the following error:
"ShareDB can't be used to access local zone"
EDIT
I found the problem - I needed to process the accepted records in the AppDelegate. Now they appear in the CloudKit dashboard but I am still unable to query them. It seems I may need to fetch the sharedDatabase "MainZone" in order to query them.
Dude, I got it: First you need to get the CKRecordZone of that Shared Record. You do it by doing the following:
let sharedData = CKContainer.default().sharedCloudDatabase
sharedData.fetchAllRecordZones { (recordZone, error) in
if error != nil {
print(error?.localizedDescription)
}
if let recordZones = recordZone {
// Here you'll have an array of CKRecordZone that is in your SharedDB!
}
}
Now, with that array in hand, all you have to do is fetch normally:
func showData(id: CKRecordZoneID) {
ctUsers = [CKRecord]()
let sharedData = CKContainer.default().sharedCloudDatabase
let predicate = NSPredicate(format: "TRUEPREDICATE")
let query = CKQuery(recordType: "Elder", predicate: predicate)
sharedData.perform(query, inZoneWith: id) { results, error in
if let error = error {
DispatchQueue.main.async {
print("Cloud Query Error - Fetch Establishments: \(error)")
}
return
}
if let users = results {
print(results)
self.ctUsers = users
print("\nHow many shares in cloud: \(self.ctUsers.count)\n")
if self.ctUsers.count != 0 {
// Here you'll your Shared CKRecords!
}
else {
print("No shares in SharedDB\n")
}
}
}
}
I didn't understand quite well when you want to get those informations. I'm with the same problem as you, but I only can get the shared data by clicking the URL... To do that you'll need two functions. First one in AppDelegate:
func application(_ application: UIApplication, userDidAcceptCloudKitShareWith cloudKitShareMetadata: CKShareMetadata) {
let acceptSharesOperation = CKAcceptSharesOperation(shareMetadatas: [cloudKitShareMetadata])
acceptSharesOperation.perShareCompletionBlock = {
metadata, share, error in
if error != nil {
print(error?.localizedDescription)
} else {
let viewController: ViewController = self.window?.rootViewController as! ViewController
viewController.fetchShare(cloudKitShareMetadata)
}
}
CKContainer(identifier: cloudKitShareMetadata.containerIdentifier).add(acceptSharesOperation)
}
in ViewConroller you have the function that will fetch this MetaData:
func fetchShare(_ metadata: CKShareMetadata) {
let operation = CKFetchRecordsOperation(recordIDs: [metadata.rootRecordID])
operation.perRecordCompletionBlock = { record, _, error in
if error != nil {
print(error?.localizedDescription)
}
if record != nil {
DispatchQueue.main.async() {
self.currentRecord = record
//now you have your Shared Record
}
}
}
operation.fetchRecordsCompletionBlock = { _, error in
if error != nil {
print(error?.localizedDescription)
}
}
CKContainer.default().sharedCloudDatabase.add(operation)
}
As I said before, I'm now trying to fetch the ShareDB without accessing the URL. I don't want to depend on the link once I already accepted the share. Hope this helps you!
Could anyone tell me why my startingPoints array is still at 0 elements? I know that I am getting objects returned during the query, because that print statement prints out each query result, however it seems like those objects are not getting appended to my local array. I've included the code snippet below...
func buildStartSpots() -> Void {
let queryStartingPoints = PFQuery(className: "CarpoolSpots")
queryStartingPoints.whereKey("spotCityIndex", equalTo: self.startingCity)
queryStartingPoints.findObjectsInBackgroundWithBlock{(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
for object in objects! {
print("starting point: \(object)")
self.startingPoints.append(object)
}
} else {
// Log details of the failure
print("Error: \(error!) \(error!.userInfo)")
}
}
print("starting points")
dump(self.startingPoints)
}
While I have no experience in Parse, the block is asynchronously executed and likely non-blocking as dictated by the method name of the API call. Therefore, it is not guaranteed that the data would be available at the time you call dump, since the background thread might still be doing its work.
The only place that the data is guaranteed to be available at is the completion block you supplied to the API call. So you might need some ways to notify changes to others, e.g. post an NSNotification or use event stream constructs from third party libraries (e.g. ReactiveCocoa, RxSwift).
When you try to access the array, you need to use it within the closure:
func buildStartSpots() -> Void {
let queryStartingPoints = PFQuery(className: "CarpoolSpots")
queryStartingPoints.whereKey("spotCityIndex", equalTo: self.startingCity)
queryStartingPoints.findObjectsInBackgroundWithBlock{(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
for object in objects! {
print("starting point: \(object)")
**self.startingPoints.append(object)**
}
//use it here
startingPoints xxx
} else {
// Log details of the failure
print("Error: \(error!) \(error!.userInfo)")
}
}
print("starting points")
dump(self.startingPoints)
}
I am able to get the application functioning as intended and will close this answer out.
It seems as though that the startingPoints array is not empty, and the values I need can be accessed from a different function within that same class.
The code snippet I am using to access my locally stored query results array is here:
for object in self.startingPoints {
let startingLat = object["spotLatitude"] as! Double
let startingLong = object["spotLongitude"] as! Double
let carpoolSpotAnnotation = CarpoolSpot(name: object.valueForKey("spotTitle") as! String, subTitle: object.valueForKey("spotSubtitle") as! String, coordinate: CLLocationCoordinate2D(latitude: startingLat, longitude: startingLong))
self.mapView.addAnnotation(carpoolSpotAnnotation)
The code snippet above is located within my didUpdateLocations implementation of the locationManager function, and with this code, I am able to access the query results I need.
I am trying to save a record to CloudKit but am getting an error. I had seen elsewhere that this was an issue that required knowing how to save but I can't get this to work.
var database:CKDatabase = CKContainer.defaultContainer().publicCloudDatabase
var aRecord:CKRecord!
if self.cloudId == nil {
var recordId:CKRecordID = CKRecordID(recordName: "RecordId")
self.cloudId = recordId // Setup at top
}
aRecord = CKRecord(recordType: "RecordType", recordID: self.cloudId)
aRecord.setObject(self.localId, forKey: "localId")
// Set the normal names etc
aRecord.setObject(self.name, forKey: "name")
var ops:CKModifyRecordsOperation = CKModifyRecordsOperation()
ops.savePolicy = CKRecordSavePolicy.IfServerRecordUnchanged
database.addOperation(ops)
database.saveRecord(aRecord, completionHandler: { (record, error) in
if error != nil {
println("There was an error \(error.description)!")
} else {
var theRecord:CKRecord = record as CKRecord
self.cloudId = theRecord.recordID
}
})
This gives me the error:
There was an error <CKError 0x16d963e0: "Server Record Changed" (14/2017); "Error saving record <CKRecordID: 0x15651730; xxxxxx:(_defaultZone:__defaultOwner__)> to server: (null)"; uuid = 369226C6-3FAF-418D-A346-49071D3DD70A; container ID = "iCloud.com.xxxxx.xxxx-2">!
Not sure, given that I have added CKModifyRecordsOperation. Sadly there is no examples within Apple's documentation. I miss that (which you get on MSDN).
Thanks peeps!
A record can be saved to iCloud using CKDatabase's convenience method saveRecord: or via a CKModifyRecordsOperation. If it's a single record, you can use saveRecord: but will need to fetch the record you'd like to modify using fetchRecordWithID: prior to saving it back to iCloud. Otherwise, it will only let you save a record with a new RecordID. More here.
database.fetchRecordWithID(recordId, completionHandler: { record, error in
if let fetchError = error {
println("An error occurred in \(fetchError)")
} else {
// Modify the record
record.setObject(newName, forKey: "name")
}
}
database.saveRecord(aRecord, completionHandler: { record, error in
if let saveError = error {
println("An error occurred in \(saveError)")
} else {
// Saved record
}
}
The code above is only directionally correct but won't work as is because by the time the completionHandler of fetchRecordWithID returns, saveRecord will have fired already. A simple solution would be to nest saveRecord in the completionHandler of fetchRecordWithID. A probably better solution would be to wrap each call in a NSBlockOperation and add them to an NSOperationQueue with saveOperation dependent on fetchOperation.
This part of your code would be for a CKModifyRecordsOperation and not needed in case you are only updating a single record:
var ops:CKModifyRecordsOperation = CKModifyRecordsOperation()
ops.savePolicy = CKRecordSavePolicy.IfServerRecordUnchanged
database.addOperation(ops)
If you do use a CKModifyRecordsOperation instead, you'll also need to set at least one completion block and deal with errors when conflicts are detected with existing records:
let saveRecordsOperation = CKModifyRecordsOperation()
var ckRecordsArray = [CKRecord]()
// set values to ckRecordsArray
saveRecordsOperation.recordsToSave = ckRecordsArray
saveRecordsOperation.savePolicy = .IfServerRecordUnchanged
saveRecordsOperation.perRecordCompletionBlock { record, error in
// deal with conflicts
// set completionHandler of wrapper operation if it's the case
}
saveRecordsOperation.modifyRecordsCompletionBlock { savedRecords, deletedRecordIDs, error in
// deal with conflicts
// set completionHandler of wrapper operation if it's the case
}
database.addOperation(saveRecordsOperation)
There isn't much sample code yet besides the CloudKitAtlas demo app, which is in Objective-C. Hope this helps.
Generally speaking, you have unitary methods (like saveRecord), which deal with only one record at a time, and mass operations (like CKModifyRecordsOperation), which deal with several records at the same time.
These save operations can be used to save records, or to update records (that is, fetch them, apply changes to them, and then save them again).
SAVE examples:
You create a record and want to save it to CloudKit DB:
let database = CKContainer.defaultContainer().publicCloudDatabase
var record = CKRecord(recordType: "YourRecordType")
database.saveRecord(record, completionHandler: { (savedRecord, saveError in
if saveError != nil {
println("Error saving record: \(saveError.localizedDescription)")
} else {
println("Successfully saved record!")
}
})
You create a bunch of records and you want to save them all at once:
let database = CKContainer.defaultContainer().publicCloudDatabase
// just an example of how you could create an array of CKRecord
// this "map" method in Swift is so useful
var records = anArrayOfObjectsConvertibleToRecords.map { $0.recordFromObject }
var uploadOperation = CKModifyRecordsOperation(recordsToSave: records, recordIDsToDelete: nil)
uploadOperation.savePolicy = .IfServerRecordUnchanged // default
uploadOperation.modifyRecordsCompletionBlock = { savedRecords, deletedRecordsIDs, error in
if error != nil {
println("Error saving records: \(error.localizedDescription)")
} else {
println("Successfully saved records")
}
}
database.addOperation(uploadOperation)
UPDATE examples:
Usually, you have 3 cases in which you want to update records :
you know the record identifier (generally the recordID.recordName of the record you want to save: in that case,
you will use methods fetchRecordWithID and then saveRecord
you know there is a unique record to update but you don't know its recordID: in that case, you will use a query with method
performQuery, select the (only) one you need and again saveRecord
you are dealing with many records that you want to update: in that case, you will use a query to fetch them all
(performQuery), and a CKModifyRecordsOperation to save them all.
Case 1 - you know the unique identifier for the record you want to update:
let myRecordName = aUniqueIdentifierForMyRecord
let recordID = CKRecordID(recordName: myRecordName)
database.fetchRecordWithID(recordID, completionHandler: { (record, error) in
if error != nil {
println("Error fetching record: \(error.localizedDescription)")
} else {
// Now you have grabbed your existing record from iCloud
// Apply whatever changes you want
record.setObject(aValue, forKey: attributeToChange)
// Save this record again
database.saveRecord(record, completionHandler: { (savedRecord, saveError) in
if saveError != nil {
println("Error saving record: \(saveError.localizedDescription)")
} else {
println("Successfully updated record!")
}
})
}
})
Case 2 - you know there is a record corresponding to your conditions, and you want to update it:
let predicate = yourPredicate // better be accurate to get only the record you need
var query = CKQuery(recordType: YourRecordType, predicate: predicate)
database.performQuery(query, inZoneWithID: nil, completionHandler: { (records, error) in
if error != nil {
println("Error querying records: \(error.localizedDescription)")
} else {
if records.count > 0 {
let record = records.first as! CKRecord
// Now you have grabbed your existing record from iCloud
// Apply whatever changes you want
record.setObject(aValue, forKey: attributeToChange)
// Save this record again
database.saveRecord(record, completionHandler: { (savedRecord, saveError in
if saveError != nil {
println("Error saving record: \(saveError.localizedDescription)")
} else {
println("Successfully updated record!")
}
})
}
}
})
Case 3 - you want to grab multiple records, and update them all at once:
let predicate = yourPredicate // can be NSPredicate(value: true) if you want them all
var query = CKQuery(recordType: YourRecordType, predicate: predicate)
database.performQuery(query, inZoneWithID: nil, completionHandler: { (records, error) in
if error != nil {
println("Error querying records: \(error.localizedDescription)")
} else {
// Now you have grabbed an array of CKRecord from iCloud
// Apply whatever changes you want
for record in records {
record.setObject(aValue, forKey: attributeToChange)
}
// Save all the records in one batch
var saveOperation = CKModifyRecordsOperation(recordsToSave: records, recordIDsToDelete: nil)
saveOperation.savePolicy = .IfServerRecordUnchanged // default
saveOperation.modifyRecordsCompletionBlock = { savedRecords, deletedRecordsIDs, error in
if error != nil {
println("Error saving records: \(error.localizedDescription)")
} else {
println("Successfully updated all the records")
}
}
database.addOperation(saveOperation)
}
})
Now, that was a lenghty answer to your question, but your code mixed both a unitary save method with a CKModifyRecordsOperation.
Also, you have to understand that, each time you create a CKRecord, CloudKit will give it a unique identifier (the record.recordID.recordName), unless you provide one yourself. So you have to know if you want to fetch an existing record, or create a new one before calling all these beautiful methods :-)
If you try to create a new CKRecord using the same unique identifier as another one, then you'll most certainly get an error.
I had the same error, but I was already fetching the record by ID as Guto described. It turned out I was updating the same record multiple times, and things were getting out of sync.
I have an update-and-save method that gets called by the main thread, sometimes rapidly.
I'm using blocks and saving right away, but if you're updating records quickly you can arrive in a situation where the following happens:
Fetch record, get instance A'.
Fetch record, get instance A''.
Update A' and save.
Update A'' and save.
Update of A'' will fail because the record has been updated on the server.
I fixed this by ensuring that I wait to update the record if I'm in the midst updating it.