title: how to create back button in navigation bar
body: <p>I have 2 page. first is tableView and second is view
  when I to click on any cell go on to next page (view) in way modal segue.
  I want add back button in next page of navigation bar . this is my code in view page :
  <strong>ViewController.m</strong></p>
  
  <pre><code>- (void)viewDidLoad
  {
      [super viewDidLoad];
      self.lable.text = obji.Name;
      self.lable2.text = obji.Descript;
  
      UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:self action:@selector(Back)];
      self.navigationItem.leftBarButtonItem = backButton;
  }
  
  - (IBAction)Back
  {
      //I dont know that how return pervious page
  }
  </code></pre>