Loading Views into Nscontainerview with Swift

Loading views into NSContainerView with swift

"Container View defines a region within a view controller's view subgraph that can include a child view controller. Create an embed segue from the container view to the child view controller in the storyboard."

You mentioned NSContainerView, so I assume you're trying to do this on macOS, not iOS. Here's a useful article and code project (for iOS 6, but I was able to set up switchable subviews in iOS 9 using this as a guide):
http://sandmoose.com/post/35714028270/storyboards-with-custom-container-view-controllers

The important bits are using the embed segue, then wiring the view controllers together through a combination of viewDidLoad and prepareForSegue, and then finally loading one of the switchable view controllers (say one for each of your buttons) from the storyboard, where they are not connected to anything else.

Switching out the view embedded in a NSContainerView

You can replace a subview manually like so:

let oldView = self.view.window?.contentView!.subviews[0]
let frame = oldView.frame
oldView.removeFromSuperview()
device.view.frame = frame
self.view.window?.contentView!.addSubview(device.view)

Swift: Switch between NSViewController inside Container View / NSView

Just note that in order for this to work you have to add storyboard identifiers to your view controllers, which can by going to your storyboard then selecting the Identity Inspector in the right hand pane and then entering the Storyboard ID in the Identity subcategory.

Then this implementation of ViewController would achieve what you are looking for.

import Cocoa

class ViewController: NSViewController {

    // link to the NSView Container
    @IBOutlet weak var container : NSView!

    var vc1 : ViewController1!
    var vc2 : ViewController2!

    var vc1Active : Bool = false

    override func viewDidLoad() {
        super.viewDidLoad()

        // Make sure to set your storyboard identiefiers on ViewController1 and ViewController2
        vc1 = NSStoryboard(name: "name", bundle: nil).instantiateController(withIdentifier: "ViewController1") as! ViewController1
        vc2 = NSStoryboard(name: "name", bundle: nil).instantiateController(withIdentifier: "ViewController2") as! ViewController2

        self.addChild(vc1)
        self.addChild(vc2)
        vc1.view.frame = self.container.bounds
        self.container.addSubview(vc1.view)
        vc1Active = true

    }

    // You can link this action to both buttons
    @IBAction func switchViews(sender: NSButton) {

        for sView in self.container.subviews {
            sView.removeFromSuperview()
        }

        if vc1Active == true {

            vc1Active = false
            vc2.view.frame = self.container.bounds
            self.container.addSubview(vc2.view)

        } else {

            vc1Active = true
            vc1.view.frame = self.container.bounds
            self.container.addSubview(vc1.view)
        }

    }
}

Load more data when NSCollectionView is scrolled to end of content (macOS)

it looks, I solved it. Create an observation. And connect nscollectionview's scrollview and use this when I scrolling..:

if (self.scrollViewColl.verticalScroller?.floatValue.isEqual(to: 1.0))! && loading == false

Why is NSCollectionView not loading in Objective-C?

The registered class should be CollectionViewItem instead of NSCollectionViewItem. Change

[collectionView registerClass:[NSCollectionViewItem class] forItemWithIdentifier:collectionViewItem.identifier];

to

[collectionView registerClass:[CollectionViewItem class] forItemWithIdentifier:collectionViewItem.identifier];

It's in the error could not load the nibName: NSCollectionViewItem, but I'm so used to NS that I didn't notice.

Access NSCollectionViewItem outlets in the class with the NSCollectionView

This was fixed by casting the cell to a DCartCollectionCell.

let image = array[indexPath.item]
        if let item = self.collectionView.makeItem(withIdentifier: "DCartCollectionCell", for: indexPath) as? DCartCollectionCell {
            item.imgView.image = photo
            return item
        }

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