Swift: how to get Parse's many user's name and photo - ios

Question

I have a bunch of users on my message app, fetching my "messages" class I need to get sender's first and last name and profile image from their Parse profile on my app in order to show them in each message on the tableView.
I just want to show in tableView the name of users in class "messages" contained in the column "sender" wich contains pointers to PFUsers (of which I need "first_name", "last_name", "profile_picture")
my users class
my message class
update!
can't get where is the problem, if I downCast something, something else must be changed. here the updated code:
findTimeLineDataQuery.includeKey("sender")
findTimeLineDataQuery.findObjectsInBackgroundWithBlock({
(objects : [AnyObject]?, error : NSError?) in
if let objects = objects where error == nil {
var chats:(timelinechatsData: [String], chatsDate: [NSDate]) = ([], []) //date might be NSDate
var message: (messageObjts: [String], messageSender: [String]) = ([], [])
var datesToString: [String] {
get {
var stringDates:[String] = []
let formatter = NSDateFormatter()
formatter.dateFormat = "dd-MM-yyyy" //change the format as you wish
for date in dates {
stringDates.append(formatter.stringFromDate(date))
}
return stringDates
}
}
for singleObject in objects {
if let user = singleObject["sender"] as? PFObject {
let first_name = user["first_name"] as! String
let last_name = user["last_name"] as! String
//Cast it to how you saved it. I can't see it from the picture so I assumed you saved it as NSData
let picture = user["picture"] as! NSData
self.picturesProfilesArray.append(picture)
//once you fetch the user data, you can save it in a dictionary or however you want and later call it from cellForRowAtIndex
}
if let stringData = singleObject["message"] as? String {
chats.timelinechatsData.append(stringData)
if let messageDate = singleObject.createdAt {
chats.chatsDate.append(messageDate!)
}
}
//new
if let messageObject = singleObject["messageObject"] as? String {
message.messageObjts.append(messageObject)
}
//new senderNickname
if let messageSender = singleObject["senderNickname"] as? String {
message.messageSender.append(messageSender)
}
}
//update self
dispatch_async(dispatch_get_main_queue()) {
self.timelineChatsDataArray += chats.timelinechatsData
self.chatsDateArray += datesToString
self.messageObjectArray += message.messageObjts
self.messageSenderArray += message.messageSender
self.tableView.reloadData()
}
}
})
changes
so my
var chatsDateArray : [NSDate] = []
and
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy HH:mm"
let useDate = dateFormatter.stringFromDate(self.chatsDateArray[indexPath.row])
cell.dateMessageLabel.text = useDate
should become
var chatsDateArray : [String] = []
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "MM-dd-yyyy HH:mm"
let useDate = String(self.chatsDateArray[indexPath.row])
cell.dateMessageLabel.text = useDate
but this causes:
Initialization of immutable value 'first_name' was never used; consider replacing with assignment to '_' or removing it
Initialization of immutable value 'last_name' was never used; consider replacing with assignment to '_' or removing it
this disappears by changing var chat (chatsDate) back to string
, but this causes
Cannot convert value of type 'NSDate' to expected argument type 'String'
on
if let messageDate = singleObject.createdAt {
chats.chatsDate.append(messageDate!)
}
}

Answer 1

You can use 'includeKey' to access pointer values of related classes
findTimeLineDataQuery.includeKey("sender")
findTimeLineDataQuery.findObjectsInBackgroundWithBlock({
(objects : [AnyObject]?, error : NSError?) in
if let objects = objects where error == nil {
var chats:(timelinechatsData: [String], chatsDate: [NSDate]) = ([], []) //date might be NSDate
var message: (messageObjts: [String], messageSender: [String]) = ([], [])
var datesToString: [String] {
get {
var stringDates:[String] = []
let formatter = NSDateFormatter()
formatter.dateFormat = "dd-MM-yyyy" //change the format as you wish
for date in dates {
stringDates.append(formatter.stringFromDate(date))
}
return stringDates
}
}
for singleObject in objects {
if let user = singleObject["sender"] as! PFObject {
let first_name = user["first_name"] as! String
let last_name = user["last_name"] as! String
//Cast it to how you saved it. I can't see it from the picture so I assumed you saved it as NSData
let picture = user["picture"] as! NSData
picturesProfilesArray.append(picture)
//once you fetch the user data, you can save it in a dictionary or however you want and later call it from cellForRowAtIndex
}
if let stringData = singleObject["message"] as? String {
chats.timelinechatsData.append(stringData)
if let messageDate = singleObject.createdAt {
chats.chatsDate.append(messageDate)
}
}
//new
if let messageObject = singleObject["messageObject"] as? String {
message.messageObjts.append(messageObject)
}
//new senderNickname
if let messageSender = singleObject["senderNickname"] as? String {
message.messageSender.append(messageSender)
}
}
//update self
dispatch_async(dispatch_get_main_queue()) {
self.timelineChatsDataArray += chats.timelinechatsData
self.chatsDateArray += datesToString
self.messageObjectArray += message.messageObjts
self.messageSenderArray += message.messageSender
self.tableView.reloadData()
}
}
})