I've saved userIds in a column in parse as String and i want to convert it in PFObject . How can i do it in swift? I was trying to retrieve the userIds as follows:
followedUserQuery.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if let objects = objects {
for object in objects {
var followedUser = object["user"] as! PFObject
and i am getting this error:
Could not cast value of type '__NSCFString' (0x105f94c50) to 'PFObject' (0x104708998).
thanks for your time.
Try this
followedUserQuery.findObjectsInBackgroundWithBlock { (objects:[AnyObject], error:NSError) -> Void in
if error == nil{
if let objects = objects as! [PFObject] {
for object in objects {
var followedUser = object["user"]
}
}
Related
I have stored a array of array in parse in a column named "Polygon" like this:
[[13.74653990489156,100.4923625509455],[13.74652348443379,100.4925687879127],[13.74636831105128,100.4925992163138],[13.74660230262049,100.4924453837896]]
But I am unable to access those data =rom parse.
I have tried this method:
private func gettingPolygonsFromParse() {
let query = PFQuery(className: "AttractionPolygon")
query.findObjectsInBackgroundWithBlock { (polygonsArray, error) -> Void in
if error == nil {
for polygon in polygonsArray as! [PFObject] {
// I am unable to get polygon value from here.
}
}
}
}
It's unclear if Polygon column belongs to AttractionPolygon class.
If yes, try this:
for polygon in polygonsArray as! [PFObject] {
if let array1 = polygon["Polygon"] as? [[Double]] {
for item in array1 {
print(item)
}
}
}
I'm getting objects from Parse and display it in my UI. Now I am working on saving the data in Local DataStorage of Parse. I looked at the following Parse example:
let query = PFQuery(className: "GameScore")
query.fromLocalDatastore()
query.getObjectInBackgroundWithId("xWMyZ4YE").continueWithBlock {
(task: BFTask!) -> AnyObject in
if let error = task.error {
// Something went wrong.
return task;
}
// task.result will be your game score
return task;
}
The above example if for fetching 1 object. I dont know how to do the same for multiple objects. I am fetching the objects through MY following code:
let query:PFQuery = PFQuery(className: "Events")
query.findObjectsInBackgroundWithBlock {
(object, error) -> Void in
if object != nil
{
if(object!.count != 0)
{
for messageObject in object! {
let eventName:String? = (messageObject as! PFObject)["EventName"] as? String
let createdBy:String? = (messageObject as! PFObject)["CreatedBy"] as? String
let eventDate:String? = (messageObject as! PFObject)["EventDate"] as? String
objModalClass.eveName = eventName!
objModalClass.crtedBy = createdBy!
objModalClass.eveVenue = eventVenue!
}
}
}
}
In my above code, how can I save all the fetched objects in objModalClass in Local DataStorage. Kindly explain in detail.
You should look object pinning. As long as you have enabled the local datastore, you can retrieve objects by a pin name, as well as releasing those objects from the local datastore with unpinning. From the docs:
"Asynchronously stores the object and every object it points to in the local datastore, recursively."
For single objects:
public func pinInBackgroundWithName(name: String, block:PFBooleanResultBlock?)
For many objects:
public class func pinAllInBackground(objects: [AnyObject]?, withName name: String, block: PFBooleanResultBlock?)
The complementary unpinWithName(name: String) is available for both scenarios. Pinning only works with PFObjects and its subclasses.
You can also query from a pin name like so
var query = PFQuery.queryWithClassname("PFObject_subclass")
query.fromPinWithName("Your_given_pin_name")
query.findObjectsInBackgroundWithBlock { (objects: [PFObject]?, error: NSError?) -> Void in
//objects from pin name returned.
}
I am attempting to append the results of the parse query into usersData
struct Data {
var FirstName:String!
var LastName:String!
var Gender:String!
var Age:String!
}
In the class I have
var usersData = [Data]()
I am using this to
func parseUsersData(completionHandler: [Data] -> Void) {
var usersDataArray = [Data]()
let query = PFQuery(className: "_User")
query.fromLocalDatastore()
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if error == nil {
if let user = objects as? [PFObject]! {
for object in user! {
var singleData = Data()
singleData.FirstName = object["firstName"] as! String
singleData.LastName = object["lastName"] as! String
singleData.Gender = object["gender"] as! String
singleData.Age = object["age"] as! String
usersDataArray.append(singleData)
}
}
completionHandler(usersDataArray)
}
}
}
finally, I am trying to do this:
Edit: To clarify, I need to pass the data from the queries, userDataArray, into the array usersData.
parseUsersData { (usersDataArray) -> Void in
usersData.append(usersDataArray)
}
The error I am getting is
Cannot convert value of type '[Data]' to expected argument type 'Data'
In your last code block you seem to appending a Data array to a Data object usersData.append(usersDataArray) which causes error I think. Did you mean to write usersDataArray.append(usersData) which makes a lot more sense?
You are attempting to add an array of Data to an array that is looking for Data Objects. Add a new struct that handles your Data Array and then change the usersData to look for DataArray's:
struct DataArray {
var array = [Data]()
}
And change the line:
var usersData = [DataArray]()
usersDataArray is an array. To add an array to an other array, prefer appendContentsOf :
usersData.appendContentsOf(usersDataArray)
On Parse I have users with Facebook profile and Email login profile. So I want to bury for users data in my twitter-like app.
In my "messages" class on Parse I have column "sender" that contains pointers to parse users.
I just want to retrive and show the name of users in class "messages" contained in the column "sender" wich contains pointers to PFUsers of which I need data for keys
"first_name"
"last_name"
"profile_picture"
How can I retrive their data like name and image in order to show them in a tableview?
these are the declarations of my arrays:
var sendersArray : [String] = []
var picturesArray : [NSData] = []
maybe I could use something like this tuple, but I can't understand how to grab data from pointers
for user in list {
let firstName = "fist_name"
let lastName = "last_name"
let oProfileImage = NSData() //"image_profile" as! NSData
otherUsers.append((oName: firstName, oLastName: lastName, oImageProfle: oProfileImage))
}
version - 1:
I started with printing the whole pf object
//******************************************************
func theSearch() {
let theSearchQuery = PFQuery(className: "Messages")
theSearchQuery.findObjectsInBackgroundWithBlock({
(objects : [AnyObject]?, error : NSError?) -> Void in
for object in objects! {
let theName = object.sender!
print(object)
print(theName)
sendersArray.append(theName)
let profilePicture = object["profile_pic"] as! PFFile
picturesArray.append(profilePicture)
}
self.tableView.reloadData()
})
}
//*******************************************************
version - 2:
then, found this solution, but still, doesn't
func theSearch() {
let theSearchQuery = PFQuery(className: "Messages" )
theSearchQuery.includeKey("sender")
theSearchQuery.findObjectsInBackgroundWithBlock({
(objects : [AnyObject]?, error : NSError?) -> Void in
for object in objects! {
let theName = object.sender!["first_name"] as? String
print(object)
print(theName)
sendersArray.append(theName)
let profilePicture = object["profile_pic"] as! PFFile
picturesArray.append(profilePicture)
}
self.tableView.reloadData()
})
}
errors:
seems to be a problem with sender, maybe I shouldn't use it
thanks in advance
let theName = object.objectForKey("sender")!.objectForKey("first_name") as! String
Complete Code:
func theSearch() {
let theSearchQuery = PFQuery(className: "Messages")
theSearchQuery.includeKey("sender")
theSearchQuery.findObjectsInBackgroundWithBlock({
(objects : [AnyObject]?, error : NSError?) -> Void in
for object in objects! {
let theName = object.objectForKey("sender")!.objectForKey("first_name") as! String
print(object)
print(theName)
self.sendersArray.append(theName)
let profilePicture = object["profile_picture"] as! PFFile
self.picturesArray.append(profilePicture)
}
self.tableView.reloadData()
})
}
Also, your picturesArray should be of type PFFile, like this:
var picturesArray = [PFFile]()
NOT NSData. change that at the top of your class.
-----EDIT------:
If you want to retrieve an image from a parse query, do this:
1) at the top of your class, declare the following arrays to store the results:
// your images will be stored in the file array
var fileArray = [PFFile]()
// your first and last names will be stored in String Arrays:
var firstNameArray = [String]()
var lastNameArray = [String]()
2) perform the query:
let query1 = PFQuery(className: "_User")
query1.orderByDescending("createdAt")
query1.findObjectsInBackgroundWithBlock({
(objects : [AnyObject]?, error : NSError?) -> Void in
if error == nil {
for x in objects! {
let firstName = x.objectForKey("first_name") as! String
let lastName = x.objectForKey("last_name") as! String
self.firstNameArray.append(firstName)
self.lastNameArray.append(lastName)
if x.objectForKey("profile_picture") as? PFFile == nil {
print("do nothing cause it's nil")
}
else {
let file:PFFile = x.objectForKey("profile_image") as! PFFile
self.fileArray.append(file)
}
}
self.tableView.reloadData()
}
})
Note I am using Swift 2 and Xcode 7. Syntax is slightly different in Xcode 6.4 and Swift 1.2.
I'm using Parse findObjectsInBackgroundWithBlock that returns [AnyObject]? how do I extract the column data?
You need to cast your results like so:
objects as? [PFObject], then each result will contain a PFObject dictionary with the column name as the key. for example o["id"] will return the value of the id column for a specific object
Just do
let data = objects as! [PFObject]
let firstObject = objects[0]
// firstObject["Column"]
Well it is easy like the code below,
In my case i get the score you can use your DB table column names
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
if let objects = objects as? [PFObject] {
for object in objects {
var score : Int? = object["score"] as! Int?
}
} else {
// Log details of the failure
println("Error: \(error!) \(error!.userInfo!)")
}
}