iOS-容器视图控制器Swift

Question

I am new to iOS development. On one of the app screens, I want to use segmented control with 2 segments - say A & B. A & B have different UIView. A has tableview, B has UIImageView and textLabels. I know that I need to use Container View Controller. But not sure how. If I am not mistaken there can be only one Embedded Segue to a View Controller - then how do I get 2 UIViews.

I don't know objective C so its difficult to translate answers from similar questions on SO to swift. Also don't want to go with view.hidden = false & true as I read its not good from a memory standpoint.

Can someone please explain step by step what needs to be done - how to use loadChildViewController, didMovetoParentController, etc. How will the storyboard look like. Thanks

Answer 1

There can be only one embed segue to one container. You'd have to create 2 containers with each one having it's own segue. Or you can add child controllers from code, just create UIView in which you want your content to be add child view controller and add child controllers' view to it. I created sample project to show you storyboard setup as well.

@IBOutlet weak var containerView: UIView!

...

addChildViewController(controller)

containerView.addSubview(controller.view)
controller.view.setTranslatesAutoresizingMaskIntoConstraints(false)
var constraints = NSLayoutConstraint.constraintsWithVisualFormat("H:|[view]|", options: nil, metrics: nil, views: ["view" : controller.view])
constraints += NSLayoutConstraint.constraintsWithVisualFormat("V:|[view]|", options: nil, metrics: nil, views: ["view" : controller.view])
NSLayoutConstraint.activateConstraints(constraints)

controller.didMoveToParentViewController(self)

Answer 2

Instead of using a container view why not just setup both views in the IB and then set the hidden property of a view based on the segmented control value.

Refer to this question for a more in-depth explanation. Question here