Problem with Camera View Controller always reverting back to picker

#import "CameraViewController.h"
#import <MobileCoreServices/UTCoreTypes.h>
@interface CameraViewController ()

@end

@implementation CameraViewController


- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (void) viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    self.imagePicker = [[UIImagePickerController alloc] init];
    self.imagePicker.delegate = self;
    self.imagePicker.allowsEditing = NO;

    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
{
#warning Potentially incomplete method implementation.
    // Return the number of sections.
    return 0;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
    // Return the number of rows in the section.
    return 0;
}

#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 photo was taken or selected
        self.image = [info objectForKey:UIImagePickerControllerOriginalImage];
        if (self.imagePicker.sourceType == UIImagePickerControllerSourceTypeCamera) {
            //save the image!
            UIImageWriteToSavedPhotosAlbum(self.image, nil, nil, nil);
        }
        [self dismissViewControllerAnimated:YES completion:nil];
    }
}

@end

#import <UIKit/UIKit.h>

@interface CameraViewController : UITableViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>

@property (nonatomic,strong) UIImagePickerController *imagePicker;
@property (nonatomic,strong) UIImage *image;
@property (nonatomic, strong) NSString *videoFilePath;
@end