NSTouchBar - how to combine default text filed items with custom items - macos

Question

I am trying to combine my custom touch bar items together with the automatic text suggestions in the touch bar while editing text field.
Currently i am overriding makeTouchBar in custom NSTextView class, if i wont do that, the default touch bar will be created for the textView.
This is the main makeTouchBar, where i try to add the suggestions with item identifier .candidateList, but no luck:
extension ViewController: NSTouchBarDelegate {
override func makeTouchBar() -> NSTouchBar? {
let touchBar = NSTouchBar()
touchBar.delegate = self
touchBar.customizationIdentifier = .myBar
touchBar.defaultItemIdentifiers = [.itemId1,
.flexibleSpace,
.itemId2,
.itemId3,
.flexibleSpace,
.candidateList]
touchBar.customizationAllowedItemIdentifiers = [.itemId1]
return touchBar
}
}
Can someone provide a simple example of how to add this words suggestions item to a custom touch bar?

Answer 1

Easy. Just call super in your custom NSTextView class:
override func makeTouchBar() -> NSTouchBar {
var touchBar = super.makeTouchBar()
touchBar.delegate = self
var defaultIdentifiers = [Any](arrayLiteral:touchBar.defaultItemIdentifiers)
defaultIdentifiers.insert("CustomLabel", at: 0)
touchBar.defaultItemIdentifiers = defaultIdentifiers
return touchBar
}
override func touchBar(_ touchBar: NSTouchBar, makeItemFor identifier: NSTouchBarItemIdentifier) -> NSTouchBarItem {
if (identifier == "CustomLabel") {
var button = NSButton(title: "Custom", target: self, action: nil)
var item = NSCustomTouchBarItem(identifier: "CustomLabel")
item.view = button
item.customizationLabel = "Custom"
return item
}
else {
return super.touchBar(touchBar, makeItemFor: identifier)
}
return nil
}