@ About managing IBOutlet and actions when multiple buttons are tied to View

I have a question about how to manage UIButton's actions.
I may not be able to ask you something, but I would appreciate it if someone could reply.

@IBOutlet weak var button_0:UIButton!
@IBOutlet weak var button_1—UIButton!
@IBOutlet weak var button_2:UIButton!
@IBOutlet weak var button_3:UIButton!
// ... and more than one.

Connecting and multiple UIButton to ViewController, etc. If you want to set the action for each button

 var buttons: UIButton = [ ]

ViewDidLoad, a ViewController that prepares and manages arrays, etc.

buttons.append(button_0)
buttons.append(button_1)
buttons.append (button_2)
// ... last for a few minutes or less
for in 0..<buttons.count {
    buttons[i].tag=i
    buttons[i].addTarget(self, action:#selector(ToolView.action(_:), forControlEvents: .TouchUpInside)
}

I don't think it's very good to describe as monotonous, but is there any good way?
After all, is it better to make the installation of multiple parts from the code?

*I'm going to use ViewController action like this...

@objc private function (sender:UIButton) {
    switch sender.tag {
    case0:
        print("button_0")
    case1:
        print("button_1")
    case2:
        print("button_2")
    // ... last for a few minutes
    default —break
    }
}

Thanks to you, it has been solved.
Quesera2, it was very easy to understand with images.Thank you.
Le Pered'OO also returned it late at night that day, which was helpful.Thank you.

It may have been a question that came up when I looked it up, but it was good that I was able to find out for the first time.
@IBOutlet Collection article
Starting Application Experience,
Stack overflow