Uploading data to parse... hundreds of images at a time. HELP?!? :)

Question

I have taken it upon myself to modify the Self Deleting picture app. What I have done is set up friendsViewController and loaded my imagePicker modally from their. Everything works fine as far as all that goes but when I take a picture and upload it to Parse, I get several hundred or even thousands of uploads of the same picture to the same recipients. I know there has to be something simple I am missing that is causing this loop or whatever it is to happen. Anywho, here's my code (kind of a lot, sorry):

- (void)viewDidLoad

{[super viewDidLoad];

self.currentUser = [PFUser currentUser];
self.recipients = [[NSMutableArray alloc] init];

PFQuery *query = [PFUser query];
[query orderByAscending:@"username"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
    if (error) {
        NSLog(@"Error: %@ %@", error, [error userInfo]);
    }
    else {
        self.allUsers = objects;
        [self.tableView reloadData];
    }
}];

}

pragma mark - Table view data source

   - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{ return 1; }

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{ return [self.allUsers count]; }

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{ static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

PFUser *user = [self.allUsers objectAtIndex:indexPath.row];
cell.textLabel.text = user.username;

if ([self.recipients containsObject:user.objectId]) {
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else {
    cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;

}

pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{ [self.tableView deselectRowAtIndexPath:indexPath animated:NO];

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

PFRelation *friendsRelation = [self.currentUser relationforKey:@"friendsRelation"];
PFUser *user = [self.allUsers objectAtIndex:indexPath.row];

if (cell.accessoryType == UITableViewCellAccessoryNone) {
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
    [self.recipients addObject:user.objectId];
    [friendsRelation addObject:user];
}
else {
    cell.accessoryType = UITableViewCellAccessoryNone;
    [self.recipients removeObject:user.objectId];
}

[self.currentUser saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
    if (error) {
        NSLog(@"Error %@ %@", error, [error userInfo]);
    }
}];

}

- (IBAction)startCamera:(id)sender {
if (self.image == nil &&  [self.videoFilePath length] == 0) {
    self.imagePickerController = [[UIImagePickerController alloc] init];
    self.imagePickerController.delegate = self;
    self.imagePickerController.allowsEditing = NO;
    self.imagePickerController.videoMaximumDuration = 10;

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        self.imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    else {
        self.imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }
    self.imagePickerController.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:self.imagePickerController.sourceType];
    [self presentViewController:self.imagePickerController animated:NO completion:nil];}

}

pragma mark - Image Picker Controller Delegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
    // A photo was taken/selected!
    self.image = [info objectForKey:UIImagePickerControllerOriginalImage];
    if (self.imagePickerController.sourceType == UIImagePickerControllerSourceTypeCamera) {
        // Save the image!
        UIImageWriteToSavedPhotosAlbum(self.image, nil, nil, nil);
    }
}
else {
    // A video was taken/selected!
    self.videoFilePath = [[info objectForKey:UIImagePickerControllerMediaURL] path];
    if (self.imagePickerController.sourceType == UIImagePickerControllerSourceTypeCamera) {
        // Save the video!
        if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(self.videoFilePath)) {
            UISaveVideoAtPathToSavedPhotosAlbum(self.videoFilePath, nil, nil, nil);
        }
    }
}

[self dismissViewControllerAnimated:YES completion:nil];

}

pragma mark - Helper methods

- (void)uploadMessage {
NSData *fileData;
NSString *fileName;
NSString *fileType;

if (self.image != nil) {
    UIImage *newImage = [self resizeImage:self.image toWidth:320.0f andHeight:480.0f];
    fileData = UIImagePNGRepresentation(newImage);
    fileName = @"image.png";
    fileType = @"image";
}
else {
    fileData = [NSData dataWithContentsOfFile:self.videoFilePath];
    fileName = @"video.mov";
    fileType = @"video";
}

PFFile *file = [PFFile fileWithName:fileName data:fileData];
[file saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {

    if (error) {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An error occurred!" message:@"Please try sending your message again." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

        [alertView show];
    }
    else {
        PFObject *message = [PFObject objectWithClassName:@"Messages"];
        [message setObject:file forKey:@"file"];
        [message setObject:fileType forKey:@"fileType"];
        [message setObject:self.recipients forKey:@"recipientIds"];
        [message setObject:[[PFUser currentUser] objectId] forKey:@"senderId"];
        [message setObject:[[PFUser currentUser] username] forKey:@"senderName"];
        [message saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
            if (error) {
                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An error occurred!"
                                                                    message:@"Please try sending your message again."
                                                                   delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [alertView show];
            }
            else {
                NSLog(@"everything was successfull");
            }
        }];
    }
}];

}

- (void)reset {
self.image = nil;
self.videoFilePath = nil;

}

- (UIImage *)resizeImage:(UIImage *)image toWidth:(float)width andHeight:(float)height {
CGSize newSize = CGSizeMake(width, height);
CGRect newRectangle = CGRectMake(0, 0, width, height);
UIGraphicsBeginImageContext(newSize);
[self.image drawInRect:newRectangle];
UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

return resizedImage;

} @end

So any help in determining where I am going wrong is going to be greatly appreciated! thanks for all your kind advice guys!

Answer 1 · 2013-09-17T14:23:25Z

September 17, 2013 2:23pm

Hi Jared,

I can't tell anything from glancing at this code. If you'd like, zip up your project directory and email it to help@teamtreehouse.com. I can open it up in Xcode and see if I can help.

In the mean time, insert some breakpoints in your code and try to figure out from there what might be triggering the loop. Perhaps you can figure out what happens after the first messages is uploaded to Parse.

Welcome to the Treehouse Community

Looking to learn something new?

Jared Gross