override func viewDidAppear(animated: Bool) {
let userDefaults:NSUserDefaults = NSUserDefaults.standardUserDefaults()
let itemListFromUserDefaults:NSMutableArray? = userDefaults.objectForKey("itemList") as? NSMutableArray
if((itemListFromUserDefaults) != nil){
toDoItems = itemListFromUserDefaults!
}
self.tableView.reloadData()
print("toDoItems")
print(toDoItems)
}
In Swift, I used CoreData to save groceries list, now I want to print toDoItems in a textView, How to do it
Create an NSString out of the NSArray using map, and then assign that string to the textView's text property.
Good question, try this:
textView.text = arr.joinWithSeparator(",")
Related
I would like two display Object data gotten from Parse in swift. I have tried using label in this way but it only displays the last element in the object. Please how can I make it display all the element in the object in the label. Like one element to one label. Thanks
let query = PFQuery(className: "Questionnaire")
query.findObjectsInBackground { (objects, error) -> Void in
if error == nil {
// There were no errors in the fetch
if let returnedObjects = objects {
// var text = ""
// Objects Array is not nil
// loop through the array to get each object
for object in returnedObjects {
print(object["question"] as! String)
// text.append(object["question"] as! String)
self.Label.text = (object["question"] as! String)
}
}
}
}
You can do in one line like that and join all question with , separator , you can change separator to any (empty, -,...etc)
if let returnedObjects = returnedObjects {
self.Label.text = returnedObjects.map {($0["question"] as? String) ?? nil}.compactMap({$0}).joined(separator: ",")
}
Use tableview for this.
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! YouTableViewCell
cell.textLabel.text = yourArray[indexpath.row] as? String ?? ""
return cell
}
If it's important to use UILabel
var concatenatedString = ""
for object in returnedObjects {
concatenatedString += object["question"] as! String
}
self.Label.text = concatenatedString
You are looping through the array and setting each value to Label.text. However, setting Label.text will replace what was on the label before. That's why you only see the last item.
One solution is to display the string representation of the array:
self.Label.text = "\(object)"
Another solution is to display the items in a table view Suganya Marlin has suggested. You would need to conform to UITableViewDatasource and implement the various methods. Here is a guide.
I am trying to save/load an object to file, and for this I am just converting the object (self.game) to an array containing dictionaries, and then using write(toFile:atomically:). But the saveGame method doesn't do anything: I am allowed to choose a file, to press OK and the save panel gets dismissed, but the file isn't really saved. When I use the loadGame method I see that a strange error appears:
warning: dynamic accessors failed to find #property implementation for 'uniqueId' for entity ABCDInfo while resolving selector 'uniqueId' on class 'ABCDInfo'. Did you remember to declare it #dynamic or #synthesized in the #implementation ?
#IBAction func saveGame(_ sender: NSButton) {
let savePanel = NSSavePanel()
savePanel.allowedFileTypes = ["com.apple.property-list"]
if savePanel.runModal() == NSFileHandlingPanelOKButton {
let file = savePanel.url!.absoluteString
self.game.write(toFile: file)
}
}
#IBAction func loadGame(_ sender: NSButton) {
let openPanel = NSOpenPanel()
openPanel.allowedFileTypes = ["com.apple.property-list"]
if openPanel.runModal() == NSFileHandlingPanelOKButton {
let file = openPanel.url!.absoluteString
self.game = Game(withFile: file)
self.selectedSlot = nil
self.enemySlot = nil
self.restartButton.isEnabled = false
self.updateTurnLabel()
self.chessboardView.reloadData()
}
}
The self.game.write(toFile:) method just converts the object to a NSArray and writes it to the file passed as argument.
When you save an array with a dictionary, you can simply use writeToFile in Objective-C. But the same is not true for Swift unless the keys are absolutely string objects. You have to first archive it with NSKeyedArchiver. You can then write it to a file. If you don't archive it, you can end up with no file with or without a warning. The following is an example.
let title = recordArray[r1].valueForKey("texttitle") as! String
let text = recordArray[r1].valueForKey("texttext") as! String
let urls = recordArray[r1].valueForKey("urls") as! String
var codeArray = [NSDictionary]()
let dict = ["Title":title,"URLs":urls,"Code":text] as NSDictionary // or Dictionary
codeArray.append(dict)
let data = NSKeyedArchiver.archivedDataWithRootObject(codeArray)
data.writeToFile(path, atomically: true)
When you open a file, use NSKeyedUnarchiver to unarchive data.
Answer is below, image is here:
I was searching how to do this for a couple of days and was only able to find people who stored UILocalNotificaations in NSUserDefaults. Saving these in NSUserDefaults seemed wrong to me because it is supposed to be used for small flags. I just now finally figured out how to store notifications in CoreData. This is Using Xcode 7.3.1 and Swift 2.2
First off you need to create a new entity in your CoreDataModel
and then add a single attribute to it. the attribute should be of type Binary Data I named my table/entity "ManagedFiredNotifications" and my attribute "notification". it should look like this:
Image linked in Question above.
Next you need to add an extension to UILocalNotification it should go like this:
extension UILocalNotification {
func save() -> Bool {
let appDelegate = UIApplication.sharedApplication().delegate as? AppDelegate
let firedNotificationEntity = NSEntityDescription.insertNewObjectForEntityForName("ManagedFiredNotifications", inManagedObjectContext: appDelegate!.managedObjectContext)
guard appDelegate != nil else {
return false
}
let data = NSKeyedArchiver.archivedDataWithRootObject(self)
firedNotificationEntity.setValue(data, forKey: "notification")
do {
try appDelegate!.managedObjectContext.save()
return true
} catch {
return false
}
}
}
Now for saving a notification all you need to do is call
UILocalNotification.save()
On the notification you would like to save. my notifications were named 'notification' so I would call notification.save()
To retrieve a notification you need a method like this
func getLocalFiredNotifications() -> [UILocalNotification]? {
let managedObjectContext = (UIApplication.sharedApplication().delegate as? AppDelegate)!.managedObjectContext
let firedNotificationFetchRequest = NSFetchRequest(entityName: "ManagedFiredNotifications")
firedNotificationFetchRequest.includesPendingChanges = false
do {
let fetchedFiredNotifications = try managedObjectContext.executeFetchRequest(firedNotificationFetchRequest)
guard fetchedFiredNotifications.count > 0 else {
return nil
}
var firedNotificationsToReturn = [UILocalNotification]()
for managedFiredNotification in fetchedFiredNotifications {
let notificationData = managedFiredNotification.valueForKey("notification") as! NSData
let notificationToAdd = NSKeyedUnarchiver.unarchiveObjectWithData(notificationData) as! UILocalNotification
firedNotificationsToReturn.append(notificationToAdd)
}
return firedNotificationsToReturn
} catch {
return nil
}
}
Note that this returns an array of UILocalNotifications.
When retrieving these if you plan on removing a few of them and then storing the list again you should remove them when you get them something like this works:
func loadFiredNotifications() {
let notifications = StudyHelper().getLocalFiredNotifications()
if notifications != nil {
firedNotifications = notifications!
} else {
// throw an error or log it
}
classThatRemoveMethodIsIn().removeFiredLocalNotifications()
}
I hope this helps someone who had the same problems that I did trying to implement this.
So iv using an NSTokenField to allow data entry, the TokenField will suggest thing when the user starts typing. I want it to suggest things that are already inside core data.
To do this i have this function being called when the cell moves to superview (This is all happening inside a custom table view cell)
var subjectInformation = [NSManagedObject]()
let appDel = NSApplication.sharedApplication().delegate as! AppDelegate
let context = appDel.managedObjectContext
let fetchRequest = NSFetchRequest(entityName: "SubjectInformation")
do {
let results = try context.executeFetchRequest(fetchRequest)
subjectInformation = results as! [NSManagedObject]
} catch {
}
this returns an array of NSManagedObjects, now i want for every object in managed object get get the valueForKey("subjectName") as insert it into a array of string so that i can return that inside this token field Function
func tokenField(tokenField: NSTokenField, completionsForSubstring substring: String, indexOfToken tokenIndex: Int, indexOfSelectedItem selectedIndex: UnsafeMutablePointer<Int>) -> [AnyObject]? {
return subjectInformation //this is where is should return an array eg; ["English","Maths","Science"]
How would i do this? Thanks :)
If you properly subclassed your NSManagedObject you can use expressive Swift style filters and maps. You would cast your results array to [SubjectInformation] and
let subjectList = subjectInformation.map { $0.subjectName }
Try this:
(subjectInformation as! NSArray).valueForKeyPath("#unionOfObjects.subjectName")
This should return an array of the subjectNames of all the subjectInformation items.
I'm creating a yik yak clone and I can't seem to see the messages I post in the textField(string) on Parse. Is there something wrong I'm doing in my code that's not letting it show up on Parse?
#IBAction func postPressed(sender: AnyObject) {
if(currLocation != nil){
let testObj = PFObject(className: "BubbleTest")
testObj["userName"] = PFUser.currentUser()?.username
//testObj["profileName"] = PFUser.valueForKey("profileName") as! String
//testObj["photo"] = PFUser.currentUser()?.valueForKey("photo") as! PFFile
testObj["textField"] = self.textField.text
testObj["location"] = PFGeoPoint(latitude: currLocation!.latitude , longitude: currLocation!.longitude)
testObj["count"] = 0
testObj["replies"] = 0
testObj.saveInBackground()
self.dismissViewControllerAnimated(true, completion: nil)
}
else {
alert()
}
The reason you are not seeing anything because you post it into the wrong class. According to the picture BubbleTest is the name of the class not YikYakTest
replace this line
let testObj = PFObject(className: "YikYakTest")
by
let testObj = PFObject(className: "BubbleTest")
your code should look like :
Note use saveInBackgroundWithBlock method so you could check if there is an error while saving
let testObj = PFObject(className: "BubbleTest")
let username = PFUser.currentUser()?.username
testObj["userName"] = username
testObj["textField"] = self.textField.text
testObj["Location"] = PFGeoPoint(latitude:currLocation.latitude , longitude: currLocation.longitude)
testObj["count"] = 0
testObj["replies"] = 0
testObj.saveInBackgroundWithBlock { (success:Bool, error :NSError?) -> Void in
if error == nil
{
print("detail is saved")
self.dismissViewControllerAnimated(true, completion: nil)
}
else
{
print("error")
}
}
when you are saving PFGeopoint coordinates save it into Location column not location
I know many developer friends of mine who ran into a similar issue. I myself had this problem as well, now resolved. So hopefully I can provide some insight from what I learned querying data from Parse:
Try changing the numberOfSectionsInTableView method to return 1 instead of 0 like so:
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
You may need to also have some data structure to hold the users' posts (messages):
var userPosts:NSMutableArray! = NSMutableArray()
Also, your table view could then have as many rows as you will have posts stored in userPosts:
override func tableView(tableView: UITableView?, numberOfRowsInSection section: Int) -> Int {
return userPosts.count
}
In cellForRowAtIndexPath, replace this:
let object = PFObject(className: "BubbleTest")
WITH THIS:
let userPost : PFObject = self.posts.objectAtIndex(indexPath!.row) as! PFObject
...
cell.message.text = userPost.objectForKey("message") as! String
return cell
}
This will set the text of your custom cell's message property to whatever the user's message is (i.e.: "Testing 1 2").
Note: These steps aren't intended to be the only steps needed to solve your problem. It is meant to guide you in the right direction with some basic steps.
Hope that helps! :)