How to get control from a combo box selection?

Question

Using a combo box after a selection I want to get control to take some actions based on the selection after press tab or return in the field. I have tried a few controls like the one below:

Code Block // textShouldEndEditing
    func control(_ control: NSControl, textShouldEndEditing fieldEditor: NSText) -> Bool {
        print(#function,control.tag)

But the above control only gets control if the field is edited. I want control once tab, an item selected or return is pressed while on the filed. How is this done?

macOS
AppKit

289

Posted by

BigEagle

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Answer 1

You can create an IBAction

Code Block     @IBAction func comboAction(_ sender: NSComboBox) {
        print("Combo selected", sender.selectedTag(), sender.selectedCell()?.title)
    }

And connect it to the NSComboBox sentAction in IB / Connections Inspector

You can also:

declare that the class conforms to NSComboBoxDelegate
create an IBOutlet for the comboBox (not the BoxCell)

Code Block @IBOutlet weak var itemComboBox: NSComboBox!

set its delegate in viewDidLoad

Code Block         itemComboBox.delegate = self

Then call any of the delegate func:

Code Block     func comboBoxSelectionIsChanging(_ notification: Notification) {
        print("Selection is changing", notification)
    }
    
    func comboBoxSelectionDidChange(_ notification: Notification) {
        print("Selection has changed", notification)
    }

Posted by

Claude31

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Answer 2

You can create an IBAction

Code Block     @IBAction func comboAction(_ sender: NSComboBox) {
        print("Combo selected", sender.selectedTag(), sender.selectedCell()?.title)
    }

And connect it to the NSComboBox sentAction in IB / Connections Inspector

You can also:

declare that the class conforms to NSComboBoxDelegate
create an IBOutlet for the comboBox (not the BoxCell)

Code Block @IBOutlet weak var itemComboBox: NSComboBox!

set its delegate in viewDidLoad

Code Block         itemComboBox.delegate = self

Then call any of the delegate func:

Code Block     func comboBoxSelectionIsChanging(_ notification: Notification) {
        print("Selection is changing", notification)
    }
    
    func comboBoxSelectionDidChange(_ notification: Notification) {
        print("Selection has changed", notification)
    }

Posted by

Claude31

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Answer 3

Thanks Claude, I used the @IBAction because I needed the contents of the comboBox and I had tried the delegate before and could not see a way to get contents of comboBox.

Posted by

BigEagle

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How to get control from a combo box selection?

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