How to call a View Controller programmatically

Question

I have looked at all the tutorials I can find on this one  and I still don t have the answer   I need to call another view from the code   I am using UIStoryboards   I have changed the view many times by control-dragging from UIButtons  but now it must be from the code   I am trying to call the info page from the main menu if it is the first time the user has opened the app   I cannot seem to find a way to change the views from the code  however   All my views are controlled by the same files  ViewController2    The identifier of my main menu is ViewControllerMain  and the identifier of the info page is ViewControllerInfo   First I tried this    ViewControllerMain presentViewController  ViewControllerInfo                                   animated YES                                 completion  NULL     Then I tried making different UIViewControllers for each and saying    ViewController2 presentViewController  ViewController                                animated YES                              completion  NULL     Neither worked   For the first one  it says      Use of undeclared identifier ViewControllerMain    In the second one  it says      unexpected interface name  ViewController   expected identifier    What can I do

User · Accepted Answer

To create a view controller   UIViewController   vc     UIViewController alloc  init     To call a view controller  must be called from within another viewcontroller     self presentViewController vc animated YES completion nil     For one  use nil rather than null     Loading a view controller from the storyboard   NSString   storyboardName     MainStoryboard    UIStoryboard  storyboard    UIStoryboard storyboardWithName storyboardName bundle  nil   UIViewController   vc    storyboard instantiateViewControllerWithIdentifier   IDENTIFIER OF YOUR VIEWCONTROLLER     self presentViewController vc animated YES completion nil     Identifier of your view controller is either equal to the class name of your view controller  or a Storyboard ID that you can assign in the identity inspector of your storyboard

User · Answer

Import the view controller class which you want to show and use the following code  KartViewController  viewKart     KartViewController alloc initWithNibName   KartViewController  bundle nil    self presentViewController viewKart animated YES completion nil

User · Answer

There s 2 ways you can do this   1  Create a segue to your ViewController in your Storyboard as explained in my answer here  How to perform a segue that is not related to user input in iOS 5   2  Give your ViewController and identifier and call it using the code in my answer here  Call storyboard scene programmatically  without needing segue

User · Answer

UIStoryboard  storyboard    UIStoryboard storyboardWithName   MainStoryboard iPhone iOS7  bundle nil               AccountViewController   controller    storyboard instantiateViewControllerWithIdentifier   accountView                               self presentViewController controller animated YES completion nil            UIViewController  topRootViewController    UIApplication sharedApplication  keyWindow rootViewController          while  topRootViewController presentedViewController                        topRootViewController   topRootViewController presentedViewController                      topRootViewController presentViewController controller animated YES completion nil

User · Answer

You need to instantiate the view controller from the storyboard and then show it   ViewControllerInfo  infoController    self storyboard instantiateViewControllerWithIdentifier   ViewControllerInfo     self navigationController pushViewController infoController animated YES     This example assumes that you have a navigation controller in order to return to the previous view  You can of course also use presentViewController animated completion   The main point is to have your storyboard instantiate your target view controller using the target view controller s ID

User · Answer

You can call ViewController this way  If you want with NavigationController    1 In current Screen   Load new screen  VerifyExpViewController  addProjectViewController     VerifyExpViewController alloc  init    self navigationController pushViewController addProjectViewController animated YES     2 1 In Loaded View   add below in  h file   interface VerifyExpViewController   UIViewController  lt UINavigationControllerDelegate gt    2 2 In Loaded View   add below in  m file     implementation VerifyExpViewController  -  void viewDidLoad        super viewDidLoad        self navigationController delegate   self       self setNavigationBar     - void setNavigationBar       self navigationController navigationBar backgroundColor    UIColor clearColor       self navigationController navigationBar translucent   YES       self navigationController navigationBar setBackgroundImage  UIImage imageNamed   B topbar png   forBarMetrics UIBarMetricsDefault       self navigationController navigationBar titleTextAttributes     NSForegroundColorAttributeName   UIColor whiteColor        self navigationItem hidesBackButton   YES      self navigationItem leftBarButtonItem     UIBarButtonItem alloc  initWithImage  UIImage imageNamed   Btn topback png   style UIBarButtonItemStylePlain target self action  selector onBackButtonTap         self navigationItem leftBarButtonItem tintColor    UIColor lightGrayColor       self navigationItem rightBarButtonItem     UIBarButtonItem alloc  initWithImage  UIImage imageNamed   Save png   style UIBarButtonItemStylePlain target self action  selector onSaveButtonTap         self navigationItem rightBarButtonItem tintColor    UIColor lightGrayColor      - void onBackButtonTap  id sender        self navigationController popViewControllerAnimated YES     - IBAction onSaveButtonTap  id sender         todo for save button     end   Hope this will be useful for someone there

User · Answer

main logic behind this is    NSString   storyboardIdentifier     SecondStoryBoard    UIStoryboard  storyboard    UIStoryboard storyboardWithName storyboardIdentifier bundle  nil    UIViewController   UIVC    storyboard instantiateViewControllerWithIdentifier   YourviewControllerIdentifer      self presentViewController UIVC animated YES completion nil

User · Answer

Swift This gets a view controller from the storyboard and presents it  let storyboard   UIStoryboard name   quot Main quot   bundle  nil  let secondViewController   storyboard instantiateViewController withIdentifier   quot secondViewControllerId quot   as  SecondViewController self present secondViewController  animated  true  completion  nil   Change the storyboard name  view controller name  and view controller id as appropriate

[ios] How to call a View Controller programmatically?

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