Just start HelloWorld display in MacOS application development [duplicate] - swift

Question

This question already has answers here:
(NSMenuItem): missing setter or instance variable
(3 answers)
Closed 4 years ago.
Tutorial for Hello World
I tried using the tutorial, link described above which was going until the execution but when i use the button click to display the name it show some error
Failed to connect (sayButtonClicked) outlet from
(HelloWorld.ViewController) to (NSButton): missing setter or instance
variable
import Cocoa
class ViewController: NSViewController {
#IBOutlet weak var nameField: NSTextField!
#IBOutlet weak var helloLabel: NSTextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override var representedObject: Any? {
didSet {
// Update the view, if already loaded.
}
}
#IBAction func sayButtonClicked(_ sender: Any) {
var name = nameField.stringValue
if name.isEmpty{
name = "World"
}
let greeting = "Hello\(name)!"
helloLabel.stringValue = greeting
}
}

Answer 1

It sounds like you have an outlet connection in your storyboard named "sayButtonClicked" but "sayButtonClicked" is an IBAction, not an outlet. Try doing the following:
Delete that "sayButtonClicked" outlet from your storyboard.
Open your storyboard in the editor and the source-code for the view controller in an "assistant editor"
Control-drag from the dot next to your IBAction in your code onto the button in your storyboard. This will connect the action to the button. You may need to select "touch up inside" as the event you want to trigger the action.