CODEWITHSUNDEEP
arraysswiftbutton
ThomasTe
ThomasTe

Reputation: 61

Swift: Add all buttons to an array

I'm a novice at Swift programming.

I've created an app with multiple identical buttons. I created one button with an action and then copied this button multiple times so that it uses the same action.

Is there an easy way to add all these buttons (there are around 100) to an array, so that I can change for example the button image for all of them in one go?

Since there are so many buttons, I'd like to avoid having to add them all, one-by-one, to an Outlet collection.

As mentioned I'm a novice, so the simpler the better.

Edit All the instances of the button has the tag '1' if that's any help and was created via the main storyboard.

Thanks in advance, Thomas

Upvotes: 2

Views: 6016

Answers (4)

vacawama
vacawama

Reputation: 154691

Updated Answer:

Your buttons are contained within UIStackViews. There is one verticalStackView that contains multiple horizontalStackViews (each with one row of UIButtons).

Create an @IBOutlet to the verticalStackView, and then add your buttons to the class property called allButtons with the following code in viewDidLoad:

class ViewController: UIViewController {
    @IBOutlet weak var verticalStackView: UIStackView!

    var allButtons = [UIButton]()

    override func viewDidLoad() {
        super.viewDidLoad()

        for case let horizontalStackView as UIStackView in verticalStackView.arrangedSubviews {
            for case let button as UIButton in horizontalStackView.arrangedSubviews {
                allButtons.append(button)
            }
        }
    }
}

Original Answer:

To create an array of all UIButtons with tag == 1:

Use conditional cast as? UIButton along with compactMap to find all of the buttons in outerView.subviews and then filter to select those buttons with tag == 1:

class ViewController: UIViewController {
    @IBOutlet weak var outerView: UIView!

    var allButtons: [UIButton] = []

    override func viewDidLoad() {
        super.viewDidLoad()

        allButtons = outerView.subviews
                         .compactMap { $0 as? UIButton }
                         .filter { $0.tag == 1 }
    }

}

Note: outerView is the UIView that contains the buttons. Create an @IBOutlet to that view to make this code work.

Upvotes: 2

krishan kumar
krishan kumar

Reputation: 428

1st step: Connect all button to single IBAction in swift file

2nd step : Give all button a common special tag like 1010, 1007,.. etc

3rd step: write code given below in your IBAction 

@IBAction func didPressBtn(_ sender: Any) {
    for btn in self.view.subviews{
       if btn.tag == 1010
       {
                let btnRefrence = btn as! UIButton
                btnRefrence.setImage(img, for:.normal)

        }
    }
}

Hope this help

Upvotes: 0

Anji Mendpara
Anji Mendpara

Reputation: 90

let arrayOfButtons: [UIButton]

    for i in 0....100 {
        let button  = UIButton()

        button.setImage(UIImage, forState: .normal)
        button.setTitle("test", for: .normal)
        button.addTarget(self, action: #selector(clickBackButton(_:)), for: .touchUpInside)

        arrayOfButtons.append(button)
    }

@IBAction func clickBackButton(_ sender: UIButton)
{
}

You can do with any count, i have uesd to add 100 button with title and image.

Upvotes: 1

Sarah Alsharif
Sarah Alsharif

Reputation: 9

1- Make an array of buttons

let arrayOfButtons: [UIButton]

2- initialize it (give it a value) 3- then use loops to change values such as setting a button image

for button in arrayOfButtons {
    button.setImage(UIImage, forState: UIControlState.Normal)
}

Upvotes: 1

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