Make a UIBarButtonItem disappear using swift IOS

Question

I have an IBOutlet that I have linked to from the storyboard

@IBOutlet var creeLigueBouton: UIBarButtonItem!

and I want to make it disappea

Answer 1

If you have set of UIBarButtonItems to hide, e.g. only show them on Landscape orientation, and hide or Portrait, you can use tag and Swift Array's filter. Let's assume we made @IBOutlet link to UIToolBar:

@IBOutlet weak var toolbar: UIToolbar!

First, we save toolbar's items in viewDidLoad:

override func viewDidLoad() {
  super.viewDidLoad()
  // Do any additional setup after loading the view, typically from a nib.
  toolbarItems = toolbar.items
}

Set the tag property of UIBarButtonItem you want to show on Landscape orientation to 1 or whatever you like. Then, override func traitCollectionDidChange

override func traitCollectionDidChange(previousTraitCollection: UITraitCollection?) {
    super.traitCollectionDidChange(previousTraitCollection)

    switch (traitCollection.horizontalSizeClass, traitCollection.verticalSizeClass) {
    case (.Compact, .Regular): // iPhone Portrait
      let items: [UIBarButtonItem]?
      if view.frame.width > 320 { // iPhone 6 & 6S
        items = toolbarItems?.filter({ $0.tag < 5 })
      } else { 
        items = toolbarItems?.filter({ $0.tag < 4 })
      }
      bottomToolbar.setItems(items, animated: true)
    case (_, .Compact): // iPhone Landscape
      let items = toolbarItems?.filter({ $0.tag < 6 })
      bottomToolbar.setItems(items, animated: true)
    default: // iPad
      break
    }
  }

In this example, I set all UIBarButtonItem's tag for iPad only to 6, iPhone Landscape to 5, and for iPhone 6 & 6+ to 4.