Add child view controller to current view controller

Question

I am trying to add a child view controller in code, to the current view controller from storyboard by using the next code:

UIStoryboard *storyboard = [UIStor         


        

Answer 1

Solution in Swift (Swift 4 at the time of this writing):

//load the view controller and add as child
storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
loginVC = storyboard.instantiateViewController(withIdentifier: "LOGIN")
addChildViewController(loginVC)

//make sure that the child view controller's view is the right size
loginVC.view.frame = contentView.bounds
contentView.addSubview(loginVC.view)

//you must call this at the end per Apple's documentation
loginVC.didMove(toParentViewController: self)

Notes:

• Storyboard name is "Main".
• View controller identifier in the storyboard is named "LOGIN".
• This uses a storyboard to create load the view controller, but the same can be done programmatically. Just make sure the view is loaded into memory before you try and access the view's frame or you will get a crash (do something like present the view controller modally).