medicalViewObject=[[MedicalInfoViewController alloc] initWithNibName:@"MedicalInfoViewController" bundle:nil];
    [self.view addSubview:medicalViewObject.view];
//here i am writing removefromsuperview in another view controller
-(void)BackToMainView
{
    [self.view removeFromSuperview];
}

[medicalViewObject.view removeFromSuperview];

-(void)backButtonWasPressed;

-(void)backButtonWasPressed
{
    [medicalViewObject.view removeFromSuperview];
}

[delegate backButtonWasPressed];