issues with the iphone app runs on ipad

I had a problem with my iPhone app runs on iPad .I am using camera overlay view in first screen (launches when app starts) but when i navigate to other screen there is a blank white space on top of it.This appears in iPad only , on iPhone all works great.

Here is attached image showing blank white screen

code for camera overlay view

    controlView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
controlViewLandscape  = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 480, 320)];

controlView1= [[UIView alloc]initWithFrame:CGRectMake(0,170, 420, 480)];
controlViewLandscape1=  [[UIView alloc]initWithFrame:CGRectMake(0, 0, 480, 320)];

anImagePickerController = [UIImagePickerController new];
anImagePickerController.view.frame=CGRectMake(0, 0, 320, 480);
anImagePickerController.delegate = self;
anImagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
anImagePickerController.cameraDevice=UIImagePickerControllerCameraDeviceFront;
anImagePickerController.showsCameraControls=NO;
anImagePickerController.wantsFullScreenLayout=YES;
anImagePickerController.cameraViewTransform=CGAffineTransformScale(anImagePickerController.cameraViewTransform, 1.16676, 1.34299);



UIButton *startbutton = [UIButton buttonWithType:UIButtonTypeCustom];
[startbutton setImage:[UIImage imageNamed:@"play2.png"] forState:UIControlStateNormal];
startbutton.frame=CGRectMake(130, 390, 55, 55);
[startbutton setTitle:@"Start" forState:UIControlStateNormal];
[startbutton addTarget:self action:@selector(startChat) forControlEvents:UIControlEventTouchUpInside];
anImagePickerController.cameraOverlayView = startbutton;

UIButton *startbutton1 = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton1.frame=CGRectMake(-50, 10, 150, 30);
[startbutton1 setTitle:@"Status:" forState:UIControlStateNormal];
startbutton1.titleLabel.font=[UIFont boldSystemFontOfSize:12];


UIButton *startbutton2 = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton2.frame=CGRectMake(13, 10, 150, 30);
[startbutton2 setTitle:@"Disconnected" forState:UIControlStateNormal];
startbutton2.titleLabel.font=[UIFont boldSystemFontOfSize:12];

//setting button

UIButton *settingBtn = [UIButton buttonWithType:UIButtonTypeCustom];
settingBtn.frame=CGRectMake(272, 10, 43, 43);
//[settingBtn setTitle:@"Setting" forState:UIControlStateNormal];
[settingBtn setImage:[UIImage imageNamed:@"settings.png"] forState:UIControlStateNormal];
[settingBtn addTarget:self action:@selector(settingNavigate) forControlEvents:UIControlEventTouchUpInside];
[controlView addSubview:settingBtn];
[controlView addSubview:startbutton2];
[controlView addSubview:startbutton];
[controlView addSubview:startbutton1];
controlView.tag=10;
//for landscape

UIButton *startbuttonl = [UIButton buttonWithType:UIButtonTypeCustom];
[startbuttonl setImage:[UIImage imageNamed:@"play2.png"] forState:UIControlStateNormal];
startbuttonl.frame=CGRectMake(210, 245, 55, 55);
[startbuttonl setTitle:@"Start" forState:UIControlStateNormal];
[startbuttonl addTarget:self action:@selector(startChat) forControlEvents:UIControlEventTouchUpInside];


UIButton *startbutton1l = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton1l.frame=CGRectMake(-60,-8, 150, 30);
[startbutton1l setTitle:@"Status:" forState:UIControlStateNormal];
startbutton1l.titleLabel.font=[UIFont boldSystemFontOfSize:12];
UIButton *startbutton2l = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton2l.frame=CGRectMake(3, -8, 150, 30);
[startbutton2l setTitle:@"Disconnected" forState:UIControlStateNormal];
startbutton2l.titleLabel.font=[UIFont boldSystemFontOfSize:12];
//setting button

UIButton *settingBtnl = [UIButton buttonWithType:UIButtonTypeCustom];
settingBtnl.frame=CGRectMake(420,0, 43, 43);
//[settingBtn setTitle:@"Setting" forState:UIControlStateNormal];
[settingBtnl setImage:[UIImage imageNamed:@"settings.png"] forState:UIControlStateNormal];
[settingBtnl addTarget:self action:@selector(settingNavigate) forControlEvents:UIControlEventTouchUpInside];

[controlViewLandscape addSubview:settingBtnl];
[controlViewLandscape addSubview:startbutton开发者_C百科2l];
[controlViewLandscape addSubview:startbuttonl];
[controlViewLandscape addSubview:startbutton1l];


//for landscape left

UIButton *startbuttonlr = [UIButton buttonWithType:UIButtonTypeCustom];
[startbuttonlr setImage:[UIImage imageNamed:@"play2.png"] forState:UIControlStateNormal];
startbuttonlr.frame=CGRectMake(220, 263, 55, 55);
[startbuttonlr setTitle:@"Start" forState:UIControlStateNormal];
[startbuttonlr addTarget:self action:@selector(startChat) forControlEvents:UIControlEventTouchUpInside];


UIButton *startbutton1lr = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton1lr.frame=CGRectMake(-40, 20, 150, 30);
[startbutton1lr setTitle:@"Status:" forState:UIControlStateNormal];
startbutton1lr.titleLabel.font=[UIFont boldSystemFontOfSize:12];

UIButton *startbutton2lr = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton2lr.frame=CGRectMake(23, 20, 150, 30);
[startbutton2lr setTitle:@"Disconnected" forState:UIControlStateNormal];
startbutton2lr.titleLabel.font=[UIFont boldSystemFontOfSize:12];

//setting button

UIButton *settingBtnlr = [UIButton buttonWithType:UIButtonTypeCustom];
settingBtnlr.frame=CGRectMake(440, 20, 43, 43);
//[settingBtn setTitle:@"Setting" forState:UIControlStateNormal];
[settingBtnlr setImage:[UIImage imageNamed:@"settings.png"] forState:UIControlStateNormal];
[settingBtnlr addTarget:self action:@selector(settingNavigate) forControlEvents:UIControlEventTouchUpInside];

[controlViewLandscape1 addSubview:settingBtnlr];
[controlViewLandscape1 addSubview:startbutton2lr];
[controlViewLandscape1 addSubview:startbuttonlr];
[controlViewLandscape1 addSubview:startbutton1lr];


//for portrait down

UIButton *startbuttonlp = [UIButton buttonWithType:UIButtonTypeCustom];
[startbuttonlp setImage:[UIImage imageNamed:@"play2.png"] forState:UIControlStateNormal];
//startbuttonlp.frame=CGRectMake(-50, 210, 55, 55);
startbuttonlp.frame=CGRectMake(50, 385, 55, 55);
[startbuttonlp setTitle:@"Start" forState:UIControlStateNormal];
[startbuttonlp addTarget:self action:@selector(startChat) forControlEvents:UIControlEventTouchUpInside];


UIButton *startbutton1lp = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton1lp.frame=CGRectMake(-130, 0, 150, 30);
[startbutton1lp setTitle:@"Status:" forState:UIControlStateNormal];
startbutton1lp.titleLabel.font=[UIFont boldSystemFontOfSize:12];

UIButton *startbutton2lp = [UIButton buttonWithType:UIButtonTypeCustom];
startbutton2lp.frame=CGRectMake(-66, 0, 150, 30);
[startbutton2lp setTitle:@"Disconnected" forState:UIControlStateNormal];
startbutton2lp.titleLabel.font=[UIFont boldSystemFontOfSize:12];
//setting button

UIButton *settingBtnlp = [UIButton buttonWithType:UIButtonTypeCustom];
settingBtnlp.frame=CGRectMake(192,0, 43, 43);  
//  settingBtnlp.frame=CGRectMake(92, 70, 43, 43);
[settingBtnlp setImage:[UIImage imageNamed:@"settings.png"] forState:UIControlStateNormal];
[settingBtnlp addTarget:self action:@selector(settingNavigate) forControlEvents:UIControlEventTouchUpInside];

[controlView1 addSubview:settingBtnlp];
[controlView1 addSubview:startbutton2lp];
[controlView1 addSubview:startbuttonlp];
[controlView1 addSubview:startbutton1lp];
//to rotate it to landscape
CGAffineTransform landscapeTransform = CGAffineTransformMakeRotation(degreesToRadian(90) );
landscapeTransform = CGAffineTransformTranslate( landscapeTransform, +90.0, +90.0 );
[controlViewLandscape setTransform:landscapeTransform];

//to rotate it to landscape right
CGAffineTransform landscapeTransformr = CGAffineTransformMakeRotation(degreesToRadian(-90) );
landscapeTransformr = CGAffineTransformTranslate( landscapeTransformr, -90, -90);
[controlViewLandscape1 setTransform:landscapeTransformr];
//to rotate it to portrait right
CGAffineTransform landscapeTransformrp = CGAffineTransformMakeRotation(degreesToRadian(180) );
landscapeTransformrp = CGAffineTransformTranslate( landscapeTransformrp, +180.0, +180.0 );
[controlView1 setTransform:landscapeTransformrp];


controlViewLandscape.tag=20;
controlViewLandscape1.tag=40;
controlView1.tag=30;
//controlView1.hidden=YES;

// controlViewLandscape.hidden=YES; // controlViewLandscape1.hidden=YES; // controlView.hidden=YES;

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];


if ( ([self  interfaceOrientation] == UIInterfaceOrientationPortrait))
{

    controlView.hidden = NO;
    controlViewLandscape.hidden = YES;
    controlView1.hidden = YES;
    controlViewLandscape1.hidden = YES;

} 

if ( ([self  interfaceOrientation] == UIInterfaceOrientationLandscapeLeft))
{

    controlView.hidden = YES;
    controlViewLandscape.hidden = YES ;
    controlView1.hidden = YES;
    controlViewLandscape1.hidden = NO;

} 



if ( ([self  interfaceOrientation] == UIInterfaceOrientationPortraitUpsideDown ))
{

    controlView.hidden = YES;
    controlViewLandscape.hidden = YES;
    controlView1.hidden = NO;
    controlViewLandscape1.hidden =YES;

}

if ( ([self  interfaceOrientation] == UIInterfaceOrientationLandscapeRight))
{

    controlView.hidden = YES;
    controlViewLandscape.hidden = NO;
    controlView1.hidden = YES;
    controlViewLandscape1.hidden = YES;
}
overlayView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 500, 500)];
[overlayView addSubview:controlView];
[overlayView addSubview:controlViewLandscape];
[overlayView addSubview:controlViewLandscape1];
[overlayView addSubview:controlView1];

//anImagePickerController.cameraOverlayView = controlView;
anImagePickerController.cameraOverlayView = overlayView;

[self.navigationController presentModalViewController:anImagePickerController animated:NO];


[anImagePickerController release];

this may be because of the status bar as it is shown at the top for the iPad, and it exists at that white place for the iPhone.

solved,

use the following line to show the status bar

[[UIApplication sharedApplication]setStatusBarHidden:NO]; 

And it display a black bar instead of a white space.

Thanks everyone for the cooperation