Swift Custom Back Button and Destination

问题:

I am currently using SWRevealViewController for a sidebar menu in my app. When I click one of the options, the destination view controller doesn't have a 'back' button because it hasn't come from a proper view controller (i.e. page to go back to).

Therefore I am wanting to manually create a back button on the destination view controller which will go back to the home view controller.

I have looked at the code here: How do I manually set the "Back" destination in iOS apps

But I am struggling to implement this in Swift (one error after another!). Any help? Thanks!

EDIT

I have tried the suggestion below, but the back button just doesn't appear. This may have something to with the fact I have the navbar hidden in other views and do the following on the destination view:

override func viewDidLoad() {     super.viewDidLoad()     navigationController.setNavigationBarHidden(false, animated:true)     var myBackButton:UIButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton     myBackButton.addTarget(self, action: "popToRoot:", forControlEvents: UIControlEvents.TouchUpInside)      var myCustomBackButtonItem:UIBarButtonItem = UIBarButtonItem(customView: myBackButton)     self.navigationItem.leftBarButtonItem = myCustomBackButtonItem }  override func didReceiveMemoryWarning() {     super.didReceiveMemoryWarning() }  func popToRoot(sender:UIBarButtonItem){     self.navigationController.popToRootViewControllerAnimated(true) } 

Not sure why the back button won't show up?

Edit

This is the prepareForSegue from my sidebar view controller. If there is a way to check for the segue identifier 'test' then I can set the back button from here?

- (void) prepareForSegue: (UIStoryboardSegue *) segue sender: (id) sender { // Set the title of navigation bar by using the menu items NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow]; UINavigationController *destViewController = (UINavigationController*)segue.destinationViewController; destViewController.title = [[_menuItems objectAtIndex:indexPath.row] capitalizedString];   if ( [segue isKindOfClass: [SWRevealViewControllerSegue class]] ) {     SWRevealViewControllerSegue *swSegue = (SWRevealViewControllerSegue*) segue;      swSegue.performBlock = ^(SWRevealViewControllerSegue* rvc_segue, UIViewController* svc, UIViewController* dvc) {          UINavigationController* navController = (UINavigationController*)self.revealViewController.frontViewController;         [navController setViewControllers: @[dvc] animated: NO ];         [self.revealViewController setFrontViewPosition: FrontViewPositionLeft animated: YES];     };  }  } 

回答1:

You can write that in swift like this

Write this to add button on navigationController

    navigationController.setNavigationBarHidden(false, animated:true)     var myBackButton:UIButton = UIButton.buttonWithType(UIButtonType.Custom) as UIButton     myBackButton.addTarget(self, action: "popToRoot:", forControlEvents: UIControlEvents.TouchUpInside)     myBackButton.setTitle("YOUR TITLE", forState: UIControlState.Normal)     myBackButton.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)     myBackButton.sizeToFit()     var myCustomBackButtonItem:UIBarButtonItem = UIBarButtonItem(customView: myBackButton)      self.navigationItem.leftBarButtonItem  = myCustomBackButtonItem 

this will pops to rootViewController

    func popToRoot(sender:UIBarButtonItem){        self.navigationController.popToRootViewControllerAnimated(true)     } 

回答2:

In Swift 2.1

I am customizing Navigation Bar Items this way

• I can change Navigation bar background image, title text, text color
• I can show/hide back button
• I can Change Title/ Icon or custom action method

In AppDelegate I have

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool     {         //Cutomize navigation bar         let navBgImage:UIImage = UIImage(named: "dummy_navigation_bg_image")!         UINavigationBar.appearance().setBackgroundImage(navBgImage, forBarMetrics: .Default)         UINavigationBar.appearance().tintColor = UIColor.whiteColor()         UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName : UIColor.whiteColor()];           return true     } 

In ViewController I update Navigation Items in viewWillAppear method this way

override func viewWillAppear(animated: Bool)     {         super.viewWillAppear(animated)         setupNavigationBar()     }      // MARK: - NavigationBar methods     func setupNavigationBar ()     {          //current tab screen title         tabBarController?.title = "Manage"          //Hide back button or left bar button         tabBarController?.navigationItem.leftBarButtonItem = UIBarButtonItem(title: " ", style: .Plain, target: nil, action: nil)          //custom right bar button         var image = UIImage(named: "dummy_settings_icon")         image = image?.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)         tabBarController?.navigationItem.rightBarButtonItem = UIBarButtonItem(image: image, style: UIBarButtonItemStyle.Plain, target: self, action:  "settingButtonAction")     }      func settingButtonAction()     {         print("Setting Button tapped")         performSegueWithIdentifier("loadAccountSettingsSegue", sender: nil)      } 

回答3:

Swift 3.0 Solution:

    self.navigationController?.setNavigationBarHidden(false, animated:false)          //Create back button of type custom          let myBackButton:UIButton = UIButton.init(type: .custom)         myBackButton.addTarget(self, action: #selector(ViewController.popToRoot(sender:)), for: .touchUpInside)         myBackButton.setTitle("Back".localized(), for: .normal)         myBackButton.setTitleColor(.blue, for: .normal)         myBackButton.sizeToFit()         //Add back button to navigationBar as left Button          let myCustomBackButtonItem:UIBarButtonItem = UIBarButtonItem(customView: myBackButton)         self.navigationItem.leftBarButtonItem  = myCustomBackButtonItem     func popToRoot(sender:UIBarButtonItem){         _ = self.navigationController?.popToRootViewController(animated: true)     } 

回答4:

Here's an updated version for Swift 2/2.1:

self.navigationController? .setNavigationBarHidden(false, animated:true) let backButton = UIButton(type: UIButtonType.Custom) backButton.addTarget(self, action: "methodCall:", forControlEvents: UIControlEvents.TouchUpInside) backButton.setTitle("TITLE", forState: UIControlState.Normal) backButton.sizeToFit() let backButtonItem = UIBarButtonItem(customView: backButton) self.navigationItem.leftBarButtonItem = backButtonItem 

文章来源: Swift Custom Back Button and Destination