Instantiate and Present a viewController in Swift

Question

Issue I started taking a look of the new Swift on Xcode 6  and I tried some demo projects and tutorials  Now I am stuck at  Instantiating and then presenting a viewController from a specific storyboard Objective-C Solution UIStoryboard  storyboard    UIStoryboard storyboardWithName   quot myStoryboardName quot  bundle nil   UIViewController  vc    storyboard instantiateViewControllerWithIdentifier   quot myVCID quot     self presentViewController vc animated YES completion nil    How to achieve this on Swift

User · Answer

I know it s an old thread  but I think the current solution  using hardcoded string identifier for given view controller  is very prone to errors   I ve created a build time script  which you can access here   which will create a compiler safe way for accessing and instantiating view controllers from all storyboard within the given project   For example  view controller named vc1 in Main storyboard will be instantiated like so   let vc  UIViewController   R storyboard Main vc1      where the     character initialize the controller

User · Answer

No matter what I tried  it just wouldn t work for me - no errors  but no new view controller on my screen either  Don t know why  but wrapping it in timeout function finally made it work   DispatchQueue main asyncAfter deadline   now     0 0        let storyboard   UIStoryboard name   Main   bundle  nil      let controller   storyboard instantiateViewController withIdentifier   TabletViewController       self present controller  animated  true  completion  nil

User · Answer

If you have a Viewcontroller not using any storyboard Xib  you can push to this particular VC like below call     let vcInstance   UIViewController     yourViewController    self present vcInstance  animated  true  completion  nil

User · Answer

I created a library that will handle this much more easier with better syntax    https   github com Jasperav Storyboardable  Just change Storyboard swift and let the ViewControllers conform to Storyboardable

User · Answer

guard let vc   storyboard  instantiateViewController withIdentifier   quot add quot   else   return           vc modalPresentationStyle    fullScreen         present vc  animated  true  completion  nil

User · Answer

Swift 5  let vc   self storyboard  instantiateViewController withIdentifier   CVIdentifier   self present vc  animated  true  completion  nil

User · Answer

Swift 4       let storyboard   UIStoryboard name   Main   bundle  nil      let yourVC  YourVC   storyboard instantiateViewController withIdentifier   YourVC   as  YourVC

User · Answer

Swift 4 2 updated code is  let storyboard   UIStoryboard name   StoryboardNameHere   bundle  nil  let controller   storyboard instantiateViewController withIdentifier   ViewControllerNameHere   self present controller  animated  true  completion  nil

User · Answer

This link has both the implementations   Swift   let viewController UIViewController   UIStoryboard name   Main   bundle  nil  instantiateViewControllerWithIdentifier  ViewController   as UIViewController self presentViewController viewController  animated  false  completion  nil    Objective C  UIViewController  viewController     UIStoryboard storyboardWithName   MainStoryboard  bundle nil  instantiateViewControllerWithIdentifier   ViewController      This link has code for initiating viewcontroller in the same storyboard      Helper to Switch the View based on StoryBoard   param StoryBoard ID  as String    func switchToViewController identifier  String        let viewController   self storyboard  instantiateViewControllerWithIdentifier identifier  as  UIViewController     self navigationController  setViewControllers  viewController   animated  false

User · Answer

This answer was last revised for Swift 5 2 and iOS 13 4 SDK     It s all a matter of new syntax and slightly revised APIs  The underlying functionality of UIKit hasn t changed  This is true for a vast majority of iOS SDK frameworks   let storyboard   UIStoryboard name   myStoryboardName   bundle  nil  let vc   storyboard instantiateViewController withIdentifier   myVCID   self present vc  animated  true    If you re having problems with init coder    please refer to EridB s answer

User · Answer

If you want to present it modally  you should have something like bellow   let vc   self storyboard  instantiateViewControllerWithIdentifier  YourViewControllerID   self showDetailViewController vc as  YourViewControllerClassName  sender  self

User · Answer

Swift 3   let settingStoryboard   UIStoryboard   UIStoryboard name   SettingViewController   bundle  nil  let settingVC   settingStoryboard instantiateViewController withIdentifier   SettingViewController   as  SettingViewController self present settingVC  animated  true  completion

User · Answer

I would like to suggest a much cleaner way  This will be useful when we have multiple storyboards  1 Create a structure with all your storyboards  struct Storyboard         static let main    Main        static let login    login        static let profile    profile         static let home    home          2  Create a UIStoryboard extension like this  extension UIStoryboard      nonobjc class var main  UIStoryboard       return UIStoryboard name  Storyboard main  bundle  nil         nonobjc class var journey  UIStoryboard       return UIStoryboard name  Storyboard login  bundle  nil         nonobjc class var quiz  UIStoryboard       return UIStoryboard name  Storyboard profile  bundle  nil         nonobjc class var home  UIStoryboard       return UIStoryboard name  Storyboard home  bundle  nil          Give the storyboard identifier as the class name  and use the below code to instantiate  let loginVc   UIStoryboard login instantiateViewController withIdentifier     LoginViewController self    as  LoginViewController

User · Answer

akashivskyy s answer works just fine  But  in case you have some trouble returning from the presented view controller  this alternative can be helpful  It worked for me   Swift   let storyboard   UIStoryboard name   MyStoryboardName   bundle  nil  let vc   storyboard instantiateViewControllerWithIdentifier  someViewController   as  UIViewController    Alternative way to present the new view controller self navigationController  showViewController vc  sender  nil    Obj-C   UIStoryboard  storyboard    UIStoryboard storyboardWithName   MyStoryboardName  bundle nil   UIViewController  vc    storyboard instantiateViewControllerWithIdentifier   someViewController     self navigationController showViewController vc sender nil

User · Answer

Main  is name of  storybord file   let mainStoryboard  UIStoryboard   UIStoryboard name   Main   bundle  nil      MiniGameView  is the ID given to the ViewController in the interfacebuilder    MiniGameViewController is the CLASS name of the ViewController swift file acosiated to the ViewController var setViewController   mainStoryboard instantiateViewControllerWithIdentifier  MiniGameView   as MiniGameViewController var rootViewController   self window  rootViewController rootViewController  presentViewController setViewController  animated  false  completion  nil    This worked fine for me when i put it in AppDelegate

User · Answer

For people using  akashivskyy s answer to instantiate UIViewController and are having the exception      fatal error  use of unimplemented initializer  init coder    for class   Quick tip   Manually implement required init  coder aDecoder  NSCoder  at your destination UIViewController that you are trying to instantiate  required init  coder aDecoder  NSCoder        super init coder  aDecoder      If you need more description please refer to my answer here

[ios] Instantiate and Present a viewController in Swift

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