UITableViewCell clear color delay - ios

Question

I have two UITableViews, the first (FirstViewController.h) is the menus and the second (SecondViewController.h), the menuItems. My problem is when I make the cell from the second tableView clearColor, when I make a selection from the FirstViewController, the item on SecondViewController appear as delayed.
#interface FirstViewController ()
#end
#implementation FirstViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
_items = [[NSMutableArray alloc] init];
[_items addObject:#"Menu1"];
[_items addObject:#"Menu2"];
[_items addObject:#"Menu3"];
[_items addObject:#"Menu4"];
self.parentViewController.view.backgroundColor = [UIColor colorWithPatternImage: [UIImage imageNamed:#"light.png"]];
self.tableView.backgroundColor = [UIColor clearColor];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_items count];
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
cell.backgroundColor = [UIColor clearColor];
cell.layer.backgroundColor = [UIColor clearColor].CGColor;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
NSString *item = [_items objectAtIndex:indexPath.row];
[[cell textLabel] setText:item];
cell.textLabel.textColor = [UIColor whiteColor];
return cell;
}
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"MenuItems"]) {
SecondViewController *secondViewController = [segue destinationViewController];
_items = [[NSMutableArray alloc] initWithObjects:#"MenuItem 1", #"MenuItem 2", #"MenuItem 3", #"MenuItem 4", nil];
[secondViewController setItems:_items];
}
}
#end
//--------------------------------------------------------------------------
#implementation SecondViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.parentViewController.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"light.png"]];
self.tableView.backgroundColor = [UIColor clearColor];
UIBarButtonItem *btnBack = [[UIBarButtonItem alloc] initWithTitle:#"Menu" style:UIBarButtonItemStyleBordered target:self action:#selector(onClick_btnBack:)];
self.navigationItem.leftBarButtonItem = btnBack;
}
-(IBAction)onClick_btnBack:(id)sender {
[self.navigationController popViewControllerAnimated:YES];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_items count];
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
cell.backgroundColor = [UIColor clearColor];
cell.layer.backgroundColor = [UIColor clearColor].CGColor;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
NSString *item = [_items objectAtIndex:indexPath.row];
[[cell textLabel] setText:item];
cell.textLabel.textColor = [UIColor whiteColor];
return cell;
}
#end