How to present a modal atop the current view in Swift

Question

Xcode6  iOS8  Swift  iPad   I am trying to create a classic Web-like modal view  where the outside of the dialog box is  grayed-out   To accomplish this  I ve set the alpha value of the backgroundColor of the view for the modal to 0 5  like so   self view backgroundColor   UIColor blackColor   colorWithAlphaComponent 0 5    The only problem is that when the modal becomes full-screen  the presenting view is removed   Ref Transparent Modal View on Navigation Controller     A bit irritated at the concept here  Why remove the underlying view  A modal is  by definition  to appear atop other content  Once the underlying view is removed  it s not really a modal anymore  it s somewhere between a modal and a push transition  Wa wa wa    Anyway     To prevent this from happening  I ve set the modalPresentationStyle to CurrentContext in the viewDidLoad method of the parent controller  and in Storyboard    but no luck       self modalPresentationStyle   UIModalPresentationStyle CurrentContext     self navigationController modalPresentationStyle   UIModalPresentationStyle CurrentContext   How do I prevent the presenting view from being removed when the modal becomes full screen   tyvm   more info below   Also in Storyboard  like so  Presentation  Current Context     Thx for your help    documentation below

User · Answer

The only way I able to get this to work was by doing this on the presenting view controller       func didTapButton         self definesPresentationContext   true     self modalTransitionStyle    crossDissolve     let yourVC   self storyboard  instantiateViewController withIdentifier   YourViewController   as  YourViewController     let navController   UINavigationController rootViewController  yourVC      navController modalPresentationStyle    overCurrentContext     navController modalTransitionStyle    crossDissolve     self present navController  animated  true  completion  nil

User · Answer

The problem with setting the modalPresentationStyle from code was that you should have set it in the init   method of the presented view controller  not the parent view controller    From UIKit docs   Defines the transition style that will be used for this view controller when it is presented modally  Set       this property on the view controller to be presented  not the presenter   Defaults to       UIModalTransitionStyleCoverVertical    The viewDidLoad method will only be called after you already presented the view controller   The second problem was that you should use UIModalPresentationStyle overCurrentContext

User · Answer

First  remove all explicit setting of modal presentation style in code and do the following    In the storyboard set the ModalViewController s  modalPresentation style to Over Current context       Check the checkboxes in the Root Presenting ViewController - Provide Context and Define Context   They seem to be working even unchecked

User · Answer

I am updating a simple solution  First add an id to your segue which presents modal  Than in properties change it s presentation style to  Over Current Context   Than add this code in presenting view controller  The controller which is presenting modal    override func prepareForSegue segue  UIStoryboardSegue  sender  AnyObject         let Device   UIDevice currentDevice        let iosVersion   NSString string  Device systemVersion  doubleValue      let iOS8   iosVersion  gt   8     let iOS7   iosVersion  gt   7  amp  amp  iosVersion  lt  8     if  segue identifier     chatTable          if  iOS8                         else                self navigationController  modalPresentationStyle   UIModalPresentationStyle CurrentContext                       Make sure you change segue identifier to your own id

User · Answer

You can try this code for Swift   let popup   PopupVC   self storyboard  instantiateViewControllerWithIdentifier  PopupVC   as  PopupVC  let navigationController   UINavigationController rootViewController  popup   navigationController modalPresentationStyle   UIModalPresentationStyle OverCurrentContext  self presentViewController navigationController  animated  true  completion  nil    For swift 4 latest syntax using extension  extension UIViewController       func presentOnRoot  with  viewController   UIViewController           let navigationController   UINavigationController rootViewController  viewController          navigationController modalPresentationStyle   UIModalPresentationStyle overCurrentContext         self present navigationController  animated  false  completion  nil            How to use  let popup   PopupVC   self storyboard  instantiateViewControllerWithIdentifier  PopupVC   as  PopupVC self presentOnRoot with  popup

User · Answer

The only problem I can see in your code is that you are using CurrentContext instead of OverCurrentContext   So  replace this   self modalPresentationStyle   UIModalPresentationStyle CurrentContext self navigationController modalPresentationStyle   UIModalPresentationStyle CurrentContext   for this   self modalPresentationStyle   UIModalPresentationStyle OverCurrentContext self navigationController modalPresentationStyle   UIModalPresentationStyle OverCurrentContext

User · Answer

This worked for me in Swift 5 0  Set the Storyboard Id in the identity inspector as  destinationVC     IBAction func buttonTapped   sender  Any        let storyboard  UIStoryboard   UIStoryboard name   Main   bundle  Bundle main      let destVC   storyboard instantiateViewController withIdentifier   destinationVC   as  MyViewController      destVC modalPresentationStyle   UIModalPresentationStyle overCurrentContext     destVC modalTransitionStyle   UIModalTransitionStyle crossDissolve      self present destVC  animated  true  completion  nil

[xcode] How to present a modal atop the current view in Swift

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