Turn off UITableView bottom/top gradient mask on tvOS?

[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];

// Set the frame

[CATransaction commit];

 - (void)tableView:(UITableView *)tableView didUpdateFocusInContext:(UITableViewFocusUpdateContext *)context withAnimationCoordinator:(UIFocusAnimationCoordinator *)coordinator
{
   //You can get focused indexPath like below
   NSIndexPath *nextIndexPath = [context nextFocusedIndexPath];
   // Now get image from data source, I will assume you have an images array
   UIImage *image = [_imagesArray objectAtIndex:nextIndexPath.row];
   // Set image to image view, assuming you have a property imageView
   _imageView.image = image;
}

-(void)viewDidLoad {
    [super viewDidLoad];
    _resultsTableController = [[APLResultsTableController alloc] init];
    _searchController = [[UISearchController alloc] initWithSearchResultsController:self.resultsTableController];
    self.searchController.searchResultsUpdater = self;
    [self.searchController.searchBar sizeToFit];
    self.tableView.tableHeaderView = self.searchController.searchBar;

    self.resultsTableController.tableView.delegate = self;
    self.searchController.delegate = self;
    self.searchController.searchBar.delegate = self; // so we can monitor text changes + others


    self.definesPresentationContext = YES;  // know where you want UISearchController to be displayed

}
- (void)viewWillAppear:(BOOL)animated {
    if (self.searchControllerWasActive) {
        self.searchController.active = self.searchControllerWasActive;
        _searchControllerWasActive = NO;

        if (self.searchControllerSearchFieldWasFirstResponder) {
            [self.searchController.searchBar becomeFirstResponder];
            _searchControllerSearchFieldWasFirstResponder = NO;
        }
    }
    NSBundle *bundle = [NSBundle mainBundle];

    self.files  = [bundle pathsForResourcesOfType:@"pdf" inDirectory:@"AIMPDF"];
    NSString *documentsDirectoryPath = [self.files objectAtIndex:thepath.row];

    self.title = @"Devo Songs";
    self.filenames = [[documentsDirectoryPath lastPathComponent] stringByDeletingPathExtension];
    NSLog(@"%@", filenames);

    NSMutableArray *names = [NSMutableArray arrayWithCapacity:[self.files count]];
    for (NSString *path in self.files) {
        [names addObject:[[path lastPathComponent] stringByDeletingPathExtension]];
    }
    self.files = names;


    self.tableView.backgroundColor = [UIColor whiteColor];
    self.parentViewController.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"iphonebackground.png"]];
    [super viewDidLoad];


    [super viewWillAppear:animated];

}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
    [searchBar resignFirstResponder];
}

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController {
    // update the filtered array based on the search text
    NSString *searchText = searchController.searchBar.text;
    NSMutableArray *searchResults2 = [self.files mutableCopy];

    // strip out all the leading and trailing spaces
    NSString *strippedString = [searchText stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

    // break up the search terms (separated by spaces)
    NSArray *searchItems = nil;
    if (strippedString.length > 0) {
        searchItems = [strippedString componentsSeparatedByString:@" "];
    }



    for (NSString *searchString in searchItems) {

        NSPredicate *sPredicate =
        [NSPredicate predicateWithFormat:@"SELF contains[c] %@", searchString];
        [searchResults2 filterUsingPredicate:sPredicate];


    }


    // hand over the filtered results to our search results table
    APLResultsTableController *tableController = (APLResultsTableController *)self.searchController.searchResultsController;
    tableController.filteredProducts = searchResults2;
    [tableController.tableView reloadData];
}

- (void)handleSearchForTerm:(NSString *)searchTerm
{
    [self setSavedSearchTerm:searchTerm];

    if ([self searchResults] == nil)
    {
        NSMutableArray *array = [[NSMutableArray alloc] init];
        [self setSearchResults:array];
        array = nil;
    }

    [[self searchResults] removeAllObjects];

    if ([[self savedSearchTerm] length] != 0)
    {
        for (NSString *currentString in [self files])
        {
            if ([currentString rangeOfString:searchTerm options:NSCaseInsensitiveSearch].location != NSNotFound)
            {
                [[self searchResults] addObject:currentString];
            }
        }
    }
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    // Return the number of sections.
    return 1;
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.
    NSInteger rows;

        rows = [[self files] count];
    return rows;
}


// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NSString *filename = [[[self.files objectAtIndex:indexPath.row] lastPathComponent] stringByDeletingPathExtension];
    NSInteger row = [indexPath row];
    NSString *contentForThisRow = nil;


        contentForThisRow = filename;

    static NSString *CellIdentifier = @"CellIdentifier";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }


           [[cell textLabel] setText:contentForThisRow];
        cell.textLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:90];
        cell.textLabel.textColor = [UIColor blackColor];
        cell.backgroundColor = [UIColor lightGrayColor];
        return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    self.selectedCountry = (tableView == self.tableView) ?
    self.files[indexPath.row] : self.resultsTableController.filteredProducts[indexPath.row];

    [self performSegueWithIdentifier:@"ShowSong" sender:self];




}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Make sure your segue name in storyboard is the same as this line
    if ([[segue identifier] isEqualToString:@"ShowSong"])
    {

        NSLog(@"Selecting %@", self.selectedCountry);
        FirstViewController* userViewController = [segue destinationViewController];
        userViewController.selectedCountry = self.selectedCountry;

        //if you need to pass data to the next controller do it here
    }
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.filteredProducts.count;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    self.selectedCountry = [self.filteredProducts objectAtIndex:indexPath.row];

    [self performSegueWithIdentifier:@"ShowSong" sender:self];




}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Make sure your segue name in storyboard is the same as this line
    if ([[segue identifier] isEqualToString:@"ShowSong"])
    {

        NSLog(@"SelectingSearch %@", self.selectedCountry);
        FirstViewController* userViewController = [segue destinationViewController];
        userViewController.selectedCountry = self.selectedCountry;

        //if you need to pass data to the next controller do it here
    }
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NSString *filename = [[[self.filteredProducts objectAtIndex:indexPath.row] lastPathComponent] stringByDeletingPathExtension];
    NSInteger row = [indexPath row];
    NSString *contentForThisRow = nil;


    contentForThisRow = filename;

    static NSString *CellIdentifier = @"CellIdentifier";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }


    [[cell textLabel] setText:contentForThisRow];
    cell.textLabel.font = [UIFont fontWithName:@"Helvetica Neue" size:90];
    cell.textLabel.textColor = [UIColor blackColor];
    cell.backgroundColor = [UIColor lightGrayColor];
    return cell;

}


@end

override func draw(_ rect: CGRect) {
        let context = UIGraphicsGetCurrentContext()
        for y : CGFloat in stride(from: 0.0 ,to: rect.height, by: elementSize) {
            var saturation = y < rect.height / 2.0 ? CGFloat(2 * y) / rect.height : 2.0 * CGFloat(rect.height - y) / rect.height
            saturation = CGFloat(powf(Float(saturation), y < rect.height / 2 ? saturationExponentTop : saturationExponentBottom))
            let brightness = CGFloat(1.0)

            for x : CGFloat in stride(from: 0.0 ,to: rect.width, by: elementSize) {
                let hue = x / rect.width
                let color = UIColor(hue: hue, saturation: saturation, brightness: brightness, alpha: 1.0)
                context!.setFillColor(color.cgColor)
                context!.fill(CGRect(x:x, y:y, width:elementSize,height:elementSize))
            }
        }
    }

 let brightness = CGFloat(1.0)