Uploading the File and Message

if (self.image == nil && [self.videoFilePath length] == 0){
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Try again!" message:@"Please     capture or select a photo or video to share!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];   
    [alertView show];
    [self presentViewController:self.imagePicker animated:NO completion:nil];
}

#import "CameraViewController.h"
#import <MobileCoreServices/UTCoreTypes.h>

@interface CameraViewController ()
@end
@implementation CameraViewController

- (void)viewDidLoad
  {
   [super viewDidLoad];
    self.friendsRelation = [[PFUser currentUser] objectForKey:@"friendsRelation"];
    self.recipients = [[NSMutableArray alloc] init];
  }

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];

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

   if (self.image == nil && [self.videoFilePath length] == 0){
   self.imagePicker = [[UIImagePickerController alloc] init];
   self.imagePicker.delegate = self;
   self.imagePicker.allowsEditing = NO;
   self.imagePicker.videoMaximumDuration = 10;

   if([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
   self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
   }
  else {
  self.imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
  }

  self.imagePicker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:self.imagePicker.sourceType];

  [self presentViewController:self.imagePicker animated:NO completion:nil];
  }
}

#pragma mark - Table view data source
 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {
     return 1;
    }

 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
    {
      return[self.friends count];
    }

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
      static NSString *CellIdentifier = @"Cell";
      UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier  forIndexPath:indexPath];

     // Configure the cell...
     PFUser *user = [self.friends 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 = [self.tableView cellForRowAtIndexPath:indexPath];
        PFUser *user = [self.friends objectAtIndex:indexPath.row];   
        if (cell.accessoryType == UITableViewCellAccessoryNone){
           cell.accessoryType = UITableViewCellAccessoryCheckmark;
           [self.recipients addObject:user.objectId];
           }
        else {
       cell.accessoryType = UITableViewCellAccessoryNone;
       [self.recipients removeObject:user.objectId];
       }    
    }

#pragma mark - Image Picker Controller delegate
  - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
     [self dismissViewControllerAnimated:NO completion:nil];   
     [self.tabBarController setSelectedIndex:0];
    }

 - (void)imagePickerControllerDidCancel:(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.imagePicker.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.imagePicker.sourceType == UIImagePickerControllerSourceTypeCamera){
        //save the video
        if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(self.videoFilePath)) {
        UISaveVideoAtPathToSavedPhotosAlbum(self.videoFilePath, nil, nil, nil);
          }
         }
        }
       [self dismissViewControllerAnimated:YES completion:nil];
       }

#pragma mark - IBActions
  - (IBAction)cancel:(id)sender {
       [self reset];
       [self.tabBarController setSelectedIndex:0];
     }

  - (IBAction)send:(id)sender {
    if (self.image == nil && [self.videoFilePath length] == 0){
       UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Try again!" message:@"Please  capture or select a photo or video to share!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

    [alertView show];
    [self presentViewController:self.imagePicker animated:NO completion:nil];
   }
  else {
    [self uploadMessage];
    //[self reset];
    [self.tabBarController setSelectedIndex:0];
   }
 }

#pragma mark - helper methods
- (void)uploadMessage {
//Check if image or video
//If image, shrink it
//Upload the file
//Upload the message
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:fileType 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 {
                //Everything was successful!
                [self reset];
            }
        }];                
      }    
  }];
}

- (void)reset {
   self.image = nil;
   self.videoFilePath = nil;
  [self.recipients removeAllObjects];
  }

- (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