This code explains.., how to roll camera in your iphone SDK application. To roll the camera you'll required UIImagePickerController class.

Find the code below..

// Create image picker controller
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
 
// Set source to the camera
imagePicker.sourceType =  UIImagePickerControllerSourceTypeCamera;
 
// Delegate is self
imagePicker.delegate = self;
 
// Allow editing of image ?
imagePicker.allowsImageEditing = NO;
 
// Show image picker
[self presentModalViewController:imagePicker animated:YES];

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
  // Access the uncropped image from info dictionary
  UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
 
  // Save image
  UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
 
  [picker release];
}