I'm making an social application in which I want to display the comments from the users.
Now sometimes when I open the VC it will display the same cell twice (or sometimes even more). See the picture below:
The strange thing is when I 'println' the objects from the 'PFQuery Block' in the CellForRowAtIndexPath it shows the println 2 times or more. I have no idea how this comes.. Something to do with CachePolicy maybe?
P.s: No answer found at same problem: Here
}else {
let commentCell:commentTableViewCell = tableView.dequeueReusableCellWithIdentifier("commentCell") as commentTableViewCell
let commentIndex:NSIndexPath = NSIndexPath(forRow: indexPath.row-2, inSection: 0)
let comment:PFObject = userComments.objectAtIndex(commentIndex.row) as PFObject
// Comment Label
commentCell.commentLabel.text = comment.objectForKey("content") as String!
// Datum
let date:NSDate = NSDate(timeIntervalSinceNow: 1)
let string:NSString = date.timeAgoSinceDate(comment.createdAt)
commentCell.datumLabel.text = string
// Load each comment after row: 1
var userCommentImage:PFQuery = PFUser.query()
userCommentImage.whereKey("objectId", equalTo: comment.objectForKey("gebruiker").objectId)
userCommentImage.findObjectsInBackgroundWithBlock({
(objects:[AnyObject]!, error:NSError!) -> Void in
if error == nil{
println("How many reactions are there? = \(objects.count)")
let user:PFUser = (objects as NSArray).firstObject as PFUser
commentCell.userLabel.text = user.username
// Profile Image
let profileImage:PFFile = user["profileImage"] as PFFile
profileImage.getDataInBackgroundWithBlock({
(imageData:NSData!, error:NSError!) -> Void in
if error == nil{
let image = UIImage(data: imageData)
commentCell.userImageView.image = image
UIView.animateWithDuration(0.5, animations: {
commentCell.userImageView.alpha = 1
commentCell.userLabel.alpha = 1
commentCell.datumLabel.alpha = 1
commentCell.commentLabel.alpha = 1
})
}
})
}
})
return commentCell
}
Related
I am trying to implement a UICollectionView with custom cells.
The setup is the following:
4 Cells
If I get the data of an downloaded image => fill the cell's imageView with that image.
else: use a placeholder.
The PFFiles of the images are saved within imageFileDic:[String:PFFile].
This is my UPDATED cellForItemAtIndexPath:
let collectionCell:SettingsCollectionViewCell =
collectionView.dequeueReusableCellWithReuseIdentifier("collectionCell",
forIndexPath: indexPath) as! SettingsCollectionViewCell
if indexPath.row < imageFileDic.count {
if let imageId = imageFileIds[indexPath.row] as? String {
if let imageData = imageFileDic[imageId]{
collectionCell.collectionViewImage.file = imageData
collectionCell.collectionViewImage.loadInBackground()
}
}
} else{
collectionCell.collectionViewButton.setImage(UIImage(), forState: .Normal)
collectionCell.collectionViewImage.image = UIImage(named: "CameraBild.png")
}
Now sometimes (1/5 times) my application decides to display an image twice, or in the position of cell nr. 4.
in my query I am always deleting the dictionaries and arrays before appending new data.
Any ideas?
Edit:
This is the PFQuery I am calling:
let imageQuery = PFQuery(className: "Images")
imageQuery.whereKey("sender", equalTo: objectID!)
imageQuery.addAscendingOrder("createdAt")
imageQuery.cachePolicy = .NetworkElseCache
imageQuery.findObjectsInBackgroundWithBlock { (objects, error) in
if error != nil {
createAlert(error!)
}
else{
if let objects = objects{
self.imageFileDic.removeAll()
self.imageFileIds.removeAll()
for object in objects{
if let id = object.objectId{
print("id found")
if let imageFile = object.objectForKey("imageFile") as? PFFile{
self.imageFileIds.append(id)
self.imageFileDic[id] = imageFile
if object == objects.last{
print(self.imageFileIds.count)
print(self.imageFileDic.count)
self.mainCollectionView.reloadData()
}
}
}
}
}
}
}
}
I think you should update image to main thread
dispatch_async(dispatch_get_main_queue()) {
collectionCell.collectionViewImage.file = imageData
collectionCell.collectionViewImage.loadInBackground()
}
I have a profile page that is made up of two custom tableview cells. The first custom cell is the user's info. The second custom cell is the user's friend. The first row is the user's info, and all of the cells after that are the user's friends. My code worked in Xcode 6, but stopped working after the update.
Problem: A user with 2 friends, their profile page should have a table with three cells: 1 user info cell, 2 friend cells. However, the first and second cell aren't showing. Only the third cell is showing.
Clarification: There should be three cells. Cell 1 is not showing. Cell 2 is not showing. But Cell 3 is showing. Cell 1 is the user's info. Cell 2 is one friend. Cell 3 is another friend.
Here's my code:
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return friendList.count + 1
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if indexPath.row == 0{
return 182.0
}else{
return 95.0
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if indexPath.row != 0{
let cell = tableView.dequeueReusableCellWithIdentifier("friendCell", forIndexPath: indexPath) as! ProfileFriendTableViewCell
let friend = friendList[indexPath.row - 1]
cell.nameLabel.text = friend[1]
cell.usernameLabel.text = friend[2]
cell.schoolLabel.text = friend[3]
cell.sendRequestButton.tag = indexPath.row
var profileImageExists = false
if profileImages != nil{
for profileImage in profileImages{
if profileImage.forUser == friend[2]{
profileImageExists = true
cell.friendImageProgress.hidden = true
cell.profilePic.image = UIImage(data: profileImage.image)
UIView.animateWithDuration(0.2, animations: {
cell.profilePic.alpha = 1
})
}
}
}else if loadingImages == true{
profileImageExists = true
cell.friendImageProgress.hidden = true
cell.profilePic.image = UIImage(named: "profileImagePlaceholder")
UIView.animateWithDuration(0.2, animations: {
cell.profilePic.alpha = 1
})
}
if profileImageExists == false{
if Reachability.isConnectedToNetwork() == true{
let query = PFUser.query()
query?.getObjectInBackgroundWithId(friend[0], block: { (object, error) -> Void in
if error == nil{
if let object = object as? PFUser{
let friendProfilePicture = object.objectForKey("profileImage") as? PFFile
friendProfilePicture?.getDataInBackgroundWithBlock({ (data, error) -> Void in
if data != nil{
let image = UIImage(data: data!)
cell.profilePic.image = image
if let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext {
let newProfileImage = NSEntityDescription.insertNewObjectForEntityForName("ProfileImageEntity", inManagedObjectContext: managedObjectContext) as! ProfileImage
newProfileImage.forUser = friend[2]
newProfileImage.image = UIImagePNGRepresentation(image!)
do{
try managedObjectContext.save()
}catch _{
print("insert error")
}
}
}else{
cell.friendImageProgress.hidden = true
cell.profilePic.image = UIImage(named: "profileImagePlaceholder")
}
}, progressBlock: { (progress: Int32) -> Void in
let percent = progress
let progressPercent = Float(percent) / 100
cell.friendImageProgress.progress = progressPercent
cell.friendImageProgress.hidden = true
})
}
}
})
}
else{
cell.friendImageProgress.hidden = true
cell.profilePic.image = UIImage(named: "profileImagePlaceholder")
}
}
return cell
}else{
let cell = tableView.dequeueReusableCellWithIdentifier("profileTopCell", forIndexPath: indexPath) as! ProfileTableViewCell
var profileImageExists = false
if profileImages != nil{
for profileImage in profileImages{
if profileImage.forUser == PFUser.currentUser()!.username!{
profileImageExists = true
cell.profilePic.image = UIImage(data: profileImage.image)
}
}
}else if loadingImages == true{
profileImageExists = true
cell.profilePic.image = UIImage(named: "profileImagePlaceholder")
}
if profileImageExists == false{
if Reachability.isConnectedToNetwork() == true{
let profilePicture = PFUser.currentUser()!.objectForKey("profileImage") as? PFFile
profilePicture?.getDataInBackgroundWithBlock({ (data, error) -> Void in
if data != nil{
let image = UIImage(data: data!)
cell.profilePic.image = image
if let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext {
let newProfileImage = NSEntityDescription.insertNewObjectForEntityForName("ProfileImageEntity", inManagedObjectContext: managedObjectContext) as! ProfileImage
newProfileImage.forUser = PFUser.currentUser()!.username!
newProfileImage.image = UIImagePNGRepresentation(image!)
do{
try managedObjectContext.save()
}catch _{
print("insert error")
}
}
}else{
cell.profilePic.image = UIImage(named: "profileImagePlaceholder")
}
})
}else{
cell.profilePic.image = UIImage(named: "profileImagePlaceholder")
}
}
cell.nameLabel.text = PFUser.currentUser()!.objectForKey("Name") as? String
cell.usernameLabel.text = PFUser.currentUser()!.objectForKey("username") as? String
let friendNumber = PFUser.currentUser()!.objectForKey("numberOfFriends") as? Int
if friendNumber != 1{
cell.numberOfFriendsLabel.text = "\(friendNumber!) Friends"
}else{
cell.numberOfFriendsLabel.text = "1 Friend"
}
return cell
}
}
Try to use estimatedRowHeightand rowHeight = UITableViewAutomaticDimension on your viewDidLoad or viewWillAppear and on heightForRowAtIndexPath return UITableViewAutomaticDimension, remember to put constraints on your custom cell, so these can work properly.
Thanks to Jeremy Andrews (https://stackoverflow.com/a/31908684/3783946), I found the solution:
"All you have to do is go to file inspector - uncheck size classes - there will be warnings etc.run and there is the data - strangely - go back to file inspector and check "use size classes" again, run and all data correctly reflected. Seems like in some cases the margin is set to negative."
It was just a bug.
I'm building an app for creating events which uses parse as a back end. The main interface is a collection view with a custom cell, which when flipped displays an array of UIImageViews added to the cell file as an IBOutlet collection.
#IBOutlet var imageViewArray: [UIImageView]!
Inside the event.getDataInBackground block I have this code, which doesn't get called for some reason, I think it will work once it is but does anyone know what's up? Thanks!
//gets profile pictures for image view array on back of cell
if let attendeeArray = event?.objectForKey("attendees") as? [PFUser] {
for var index = 0; index < attendeeArray.count; ++index {
let profileImageView = cell.imageViewArray[index]
let usr : PFUser = (attendeeArray[index] as PFUser?)!
if let picture = usr.objectForKey("profilePicture") as? PFFile {
picture.getDataInBackgroundWithBlock({ (data, error) -> Void in
profileImageView.image = UIImage(data: data!)
})
}
}
}
The whole cell for row at index path method (The creator image shows up and is called but the attendee array part is not).
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
//sets up cell
let cell : EventCell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! EventCell
//adds attend action
cell.attendButton.addTarget(self, action: "buttonTapped:", forControlEvents: UIControlEvents.TouchUpInside)
//queries parse for events
let event = events?[indexPath.row]
event?.eventImage.getDataInBackgroundWithBlock({ (data, error) -> Void in
if let data = data, image = UIImage(data: data) {
cell.eventBackgroundImage.image = image
cell.eventTitleLabel.text = event?.eventTitle
//gets profile picture of events creator
if let eventCreator = event?.objectForKey("user") as? PFUser {
if let creatorImage = eventCreator.objectForKey("profilePicture") as? PFFile {
creatorImage.getDataInBackgroundWithBlock({ (data, error) -> Void in
cell.creatorImageView.image = UIImage(data: data!)
})
}
}
//gets profile pictures for image view array on back of cell
if let attendeeArray = event?.objectForKey("attendees") as? [PFUser] {
for var index = 0; index < attendeeArray.count; ++index {
let profileImageView = cell.imageViewArray[index]
let usr : PFUser = (attendeeArray[index] as PFUser?)!
if let picture = usr.objectForKey("profilePicture") as? PFFile {
picture.getDataInBackgroundWithBlock({ (data, error) -> Void in
profileImageView.image = UIImage(data: data!)
})
}
}
}
//sets correct category for cell image
if event?.category == "" {
cell.categoryImageView.image = nil
}
if event?.category == "The Arts" {
cell.categoryImageView.image = UIImage(named: "Comedy")
}
if event?.category == "The Outdoors" {
cell.categoryImageView.image = UIImage(named: "Landscape")
}
if event?.category == "Other" {
cell.categoryImageView.image = UIImage(named: "Dice")
}
if event?.category == "Sports" {
cell.categoryImageView.image = UIImage(named: "Exercise")
}
if event?.category == "Academics" {
cell.categoryImageView.image = UIImage(named: "University")
}
if event?.category == "Science" {
cell.categoryImageView.image = UIImage(named: "Physics")
}
if event?.category == "Entertainment" {
cell.categoryImageView.image = UIImage(named: "Bowling")
}
if event?.category == "Food & Drinks" {
cell.categoryImageView.image = UIImage(named: "Food")
}
if let date = event?.eventDate {
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
cell.eventDescriptionLabel.text = event?.eventDescription
cell.eventDateLabel.text = dateFormatter.stringFromDate(date)
}
}
})
cell.layer.cornerRadius = 20
return cell
}
EDITED:
//gets profile pictures for image view array on back of cell
if let attendeeArray = event?.objectForKey("attendees") as? [PFUser] {
for var index = 0; index < attendeeArray.count; ++index {
let profileImageView = cell.imageViewArray[index]
let usr : PFUser = (attendeeArray[index] as PFUser?)!
usr.fetchIfNeededInBackgroundWithBlock({ (object: PFObject?, error: NSError?) -> Void in
if let picture = object!.objectForKey("profilePicture") as? PFFile {
picture.getDataInBackgroundWithBlock({ (data, error) -> Void in
profileImageView.image = UIImage(data: data!)
})
}
})
}
}
You need to fetch the usr before you can get picture
usr.fetchIfNeededInBackgroundWithBlock({ (object: PFObject?, error: NSError?) -> Void in
if let picture = object.objectForKey("profilePicture") as? PFFile {
picture.getDataInBackgroundWithBlock({ (data, error) -> Void in
profileImageView.image = UIImage(data: data!)
})
}
})
While reloading a tableView the app crashes and I am getting error
malloc:
error for object 0x7f8c7b99be80: pointer being freed was not allocated
set a breakpoint in malloc_error_break to debug
I have set the Symbolic breakpoint for
malloc_error_break
Also try to find memory leakage with "Instruments" but it just showing same error in console but here is no any memory leakage.
How to solve this issue.
(I am using 8.3 SDK and 6.3.1 Xcode)
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var ResultCellIdentifier = "placementID"
var LoadCellIdentifier = "LoadingCell"
var count = self.arrayOfAllData.count as NSInteger
if count == 0 && indexPath.row == 0 {
let cell = tableView.dequeueReusableCellWithIdentifier("LoadingCell") as! UITableViewCell
return cell
}
else {
let cell = tableView.dequeueReusableCellWithIdentifier("placementID") as! PlacementsTableViewCell
indexPATH = indexPath
var tweet = self.arrayOfAllData.objectAtIndex(indexPath.row) as! NSDictionary
let created_at = tweet.valueForKey("created_at") as? NSString
var dateArray : NSArray = created_at!.componentsSeparatedByString(" ")
if dateArray.count != 0 {
let month = dateArray.objectAtIndex(1) as! String
let date = dateArray.objectAtIndex(2) as! String
cell.timeLabel.text = String(format: "%# %#", date,month)
}
///////////any url present in tweet text
var entities = NSDictionary()
entities = tweet.valueForKey("entities") as! NSDictionary
var urlsArray = entities.valueForKey("urls") as! NSArray
if urlsArray.count == 0 {
}else {
for item in urlsArray as! [NSDictionary] {
let expanded_url = item.valueForKey("expanded_url") as? String
}
}
///////////
var tweet_id_str = NSString()
var user_id_str = NSString()
var data = NSData()
// var name = NSString()
///////////count of retweets
var retweet_count = tweet.valueForKey("retweet_count") as! NSInteger
var retweeted_status = tweet.valueForKey("retweeted_status") as! NSDictionary
var favorite_count = retweeted_status.valueForKey("favorite_count") as! NSInteger
///////////tweet id
tweet_id_str = retweeted_status.valueForKey("id_str") as! NSString
if retweeted_status.isEqual(nil) {
}
else {
var user = retweeted_status.valueForKey("user") as! NSDictionary
///////////last update
let created_at = retweeted_status.valueForKey("created_at") as! NSString
///////////
///////////user name who added this tweet
cell.titleLabel.text = user.valueForKey("name") as? String
///////////user id who added this tweet
user_id_str = user.valueForKey("id_str") as! NSString
///////////screen name
let screen_name = user.valueForKey("screen_name") as! NSString
var followers_count = user.valueForKey("followers_count") as! NSInteger
///////////profile image of the tweet
cell.avatarImageView.image = UIImage(named: "Twitter Avatar.jpg")
let profile_image_url = user.valueForKey("profile_image_url") as! NSString
var imageUrl = NSURL(string: profile_image_url as String)
let request: NSURLRequest = NSURLRequest(URL: imageUrl!)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {(response: NSURLResponse!,data: NSData!,error: NSError!) -> Void in
if error == nil {
if data != nil {
var image = UIImage(data: data)
cell.avatarImageView.image = image
}
}
})
if retweet_count >= 5 || favorite_count >= 15 || followers_count >= 30000 {
cell.featuredImageView.hidden = false
cell.featuredImageView.image = UIImage(named: "new feature star")
}
else {
cell.featuredImageView.hidden = true
}
}
cell.mailLabel.text = ""
let tweetText = tweet.valueForKey("text") as? NSString
cell.beattypeLabel.text = tweetText as? String
if tweetText?.containsString("#gmail") == true{
NSLog("Mail id is present at index : %d", indexPath.row)
var words = NSArray()
words = NSArray(array: tweetText!.componentsSeparatedByString(" "))
var mailAddress = NSString()
for var i = 0; i < words.count; i++ {
var mailAdd = words.objectAtIndex(i) as! NSString
if mailAdd.rangeOfString("#gmail").location != NSNotFound {
NSLog("mail Address : %#", mailAdd)
if mailAdd.rangeOfString(".com").location == NSNotFound {
var lastChar = mailAdd.characterAtIndex(mailAdd.length-1)
var lastCharStr:NSString = NSString(format: "%ch", lastChar)
mailAddress = mailAdd.stringByAppendingString(".com")
}
}
}
}
return cell
}
}
at the same time Thread 1 showing this
http://i.stack.imgur.com/2YoQp.jpg
(please go through this image)
use
var cell = tableView.dequeueReusableCellWithIdentifier("placementID") as! PlacementsTableViewCell
if cell.isEqual(nil) {
cell = PlacementsTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "placementID")
}
instead of
let cell = tableView.dequeueReusableCellWithIdentifier("placementID") as! PlacementsTableViewCell
and change downloading image in other thread like follow
let qualityOfServiceClass = QOS_CLASS_BACKGROUND
let backgroundQueue = dispatch_get_global_queue(qualityOfServiceClass, 0)
dispatch_async(backgroundQueue, {
println("This is run on the background queue")
var imageData = NSData(contentsOfURL: imageUrl!)
var image = UIImage(data: imageData!)
dispatch_async(dispatch_get_main_queue(), { () -> Void in
println("This is run on the main queue, after the previous code in outer block")
cell.avatarImageView.image = image
})
})
I have been following a tutorial on Youtube which helps you create an app like Twitter using Parse as a backend service. So far I was able to add things to classes in Parse but I was either not able to retrieve them or display them in my table view.
I believe this is where my mistake is:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:messageTableViewCell = tableView!.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath!) as messageTableViewCell
let sweet:PFObject = self.timelineData.objectAtIndex(indexPath!.row) as PFObject
cell.messageTextView.alpha = 0
cell.timestampLabel.alpha = 0
cell.usernameLabel.alpha = 0
cell.messageTextView.text = sweet.objectForKey("content") as String
var dataFormatter:NSDateFormatter = NSDateFormatter()
dataFormatter.dateFormat = "yyyy-MM-dd HH:mm"
cell.timestampLabel.text = dataFormatter.stringFromDate(sweet.createdAt)
var findSweeter:PFQuery = PFUser.query()
findSweeter.whereKey("objectId", equalTo: sweet.objectForKey("username").objectId)
findSweeter.findObjectsInBackgroundWithBlock{
(objects:[AnyObject]!, error:NSError!)->Void in
if error == nil{
let user:PFUser = (objects as NSArray).lastObject as PFUser
cell.usernameLabel.text = user.username
UIView.animateWithDuration(0.5, animations: {
cell.messageTextView.alpha = 1
cell.timestampLabel.alpha = 1
cell.usernameLabel.alpha = 1
})
}
}
return cell
}
If you could help me figure this out I would really appreciate it, also please try to be detailed.
The error might also be here, I'm completely lost so I will post this as well!
func loadData(){
timelineData.removeAllObjects()
var findTimelineData:PFQuery = PFQuery(className: "Messages")
findTimelineData.findObjectsInBackgroundWithBlock{
(objects:[AnyObject]!, error:NSError!)->Void in
if error == nil{
for object in objects{
let message:PFObject = object as PFObject
self.timelineData.addObject(message)
}
let array:NSArray = self.timelineData.reverseObjectEnumerator().allObjects
self.timelineData = NSMutableArray(array: array)
self.tableView.reloadData()
}
}
}