Назначение 'id <UINavigationControllerDelegate, UIImagePickerControllerDelegate>' из несовместимого типа 'CameraVIewController *' '

Assigning to id<UINavigationControllerDelegate,UIImagePickerControllerDelegate> from incompatible type CameraViewController* предупреждение отображается возле строки picker.delegate = self;

-(IBAction) getPhoto:(id) sender {
UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

if((UIButton *) sender == takePhoto) {
    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
} else {
    //picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
   picker.sourceType = UIImagePickerControllerSourceTypeCamera;
}

[self presentModalViewController:picker animated:YES];

}