Install a different view is incorrectly configured

I got an idea and set an anchor. When I add to my mind. They work on the iPhone 5, but they show some headroom on the iPhone 6 and 6 Plus.

@property (strong, nonatomic) IBOutlet UIView *vwTop;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

    return self;
}


- (void)viewDidLoad {
    [super viewDidLoad];


    top= [[NexaTopView alloc]initWithNibName:@"NexaTopView" bundle:nil];
    bottom=[[NexaBottomViewViewController alloc]initWithNibName:@"NexaBottomViewViewController" bundle:nil];
    [self.vwTop addSubview:top.view];
    [self.bottomView addSubview:bottom.view];

    [top.txtHeader setText:@"Notifications"];
    top.txtHeader.textAlignment=NSTextAlignmentCenter;
}

   ![enter image description here][1]

      

        
        
        
      

    

but they show margin, please help me newer! [enter image description here] [2] in ios.