unable to upload file to parse.com

//
//  CameraTableViewController.m
//  Ribbit
//
//  Created by Syed Ehteshamuddin on 2015-04-16.
//  Copyright (c) 2015 techbate.com. All rights reserved.
//

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

@interface CameraTableViewController ()

@end

@implementation CameraTableViewController

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



//    self.imagePicker = [[UIImagePickerController alloc]init];
//    self.imagePicker.delegate = self;
//    self.imagePicker.allowsEditing = NO;
//    self.imagePicker.videoMaximumDuration = 10;
//    
//    self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
//    self.imagePicker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:self.imagePicker.sourceType ];
//    [self presentViewController:self.imagePicker animated:nil completion:nil];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(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:nil completion:nil];

    }
}


#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    return 1;
}

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

    // Return the number of rows in the section.

    return self.friends.count;
}


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

    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;
    }

    // Configure the cell...

    return cell;
}

-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath{

    [self.tableView deselectRowAtIndexPath:indexPath animated:NO];
    PFUser * user = [self.friends objectAtIndex:indexPath.row];

    UITableViewCell * cell = [self.tableView cellForRowAtIndexPath:indexPath];
    if (cell.accessoryType==UITableViewCellAccessoryCheckmark) {
        cell.accessoryType = UITableViewCellAccessoryNone;
        [self.recipients removeObject:user.objectId];
    }else{
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        [self.recipients addObject:user.objectId];
    }
    NSLog(@"%@", self.recipients);
}


/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return NO if you do not want the specified item to be editable.
    return YES;
}
*/

/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }   
}
*/

/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/

/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return NO if you do not want the item to be re-orderable.
    return YES;
}
*/

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

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

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

    NSString * mediaType = [info objectForKey:UIImagePickerControllerMediaType];

    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        //a phot was taken/selected
        self.image = [info objectForKey:UIImagePickerControllerOriginalImage];
        if(self.imagePicker.sourceType== UIImagePickerControllerSourceTypeCamera){
            //save the image
            UIImageWriteToSavedPhotosAlbum(self.image, nil, nil, nil);
                    }
        }else{
        self.videoFilePath = (NSString *)([[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 video or image" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
        [alertView show];
        [self presentViewController:self.imagePicker animated:NO completion:nil];
    }else{
        [self uploadMessage];
        [self.tabBarController setSelectedIndex:0];
    }

}

#pragma mark - Helpers methods

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

-(UIImage *)resizeImage:(UIImage *)image towidth:(float)width toheight:(float)height{
    CGSize size = CGSizeMake(width, height);
    CGRect rect = CGRectMake(0, 0, width, height);
    UIGraphicsBeginImageContext(size);
    [image drawInRect:rect];
    UIImage * resizedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return resizedImage;

}


-(void)uploadMessage{
    [self reset];
    NSData * fileData;
    NSString * fileType;
    NSString * fileName;
    if (self.image != nil) {

        UIImage * newImage = [self resizeImage:self.image towidth:320.0f toheight:480.0f];
        fileData = UIImagePNGRepresentation(newImage);
        fileType = @"image.png";
        fileName = @"image";

    }else{

        fileData = [NSData dataWithContentsOfFile:self.videoFilePath];
        fileType = @"video.mov";
        fileName = @"video";
    }

    PFFile * file = [PFFile fileWithName:fileName data:fileData];

    NSLog(@"the contents of file %@",fileName);

    [file saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error){
        if(error){
            UIAlertView * alertView = [[UIAlertView alloc]initWithTitle:@"Error occured saving file" message:@"Please try sending your message again" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
            [alertView show];
        }else{
            PFObject * message = [PFObject objectWithClassName:@"Messages"];
            [message setObject:file forKey:@"file"];
            [message setObject:fileType forKey:@"fileType"];
            [message setObject:self.recipients forKey:@"recipientsId"];
            [message setObject:[[PFUser currentUser]objectId] forKey:@"senderId"];
            [message setObject:[[PFUser currentUser]username] forKey:@"sendName"];
            [message saveInBackgroundWithBlock:^(BOOL succeeded, NSError * error){
                if(error){
                    UIAlertView * alertView = [[UIAlertView alloc]initWithTitle:@"Error occured saving message" message:@"Please try sending your message again" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
                    [alertView show];
                }else{
                    //everything went well
                    [self reset];

                }

            }];

        }

    }];
}
@end