How to assign different actions for same UIButton?

Question

while click on the button for the first time, the title of the button will get changed from "Add to Cart" to "Go to Cart". And from the next click the button will navigate to the next screen (cart page) [just like flipkart].

here is my piece of code:

    @IBAction func addToCartbtnTapped(_ sender: Any) {
        if let info = detailInfo {
            let cartData = CartStruct(cartItems: info, cartQuantity: 1)
            self.saveCart(data: cartData)
            showAlert()
            (sender as AnyObject).setTitle("Go to Cart", for: .normal)
            
            let cart = self.storyboard?.instantiateViewController(withIdentifier: "CartViewController") as? CartViewController
            self.navigationController?.pushViewController(cart!, animated: true)
        }
    }

I'm able to change the title of the button. But whenever I click on the button for nth number of time also, the product is getting added to the cart, screen is not navigating.

How to solve this issue?

Update..

    override func viewDidLoad() {
        super.viewDidLoad()
        UserDefaults.standard.string(forKey: "btn")
    }



    @IBAction func addToCartbtnTapped(_ sender: Any) {
        if !Clicked {
            if let info = detailInfo {
                let cartData = CartStruct(cartItems: info, cartQuantity: 1)
                self.saveCart(data: cartData)
                showAlert()
                addingTOCart.setTitle("Go to Cart", for: .normal)
                UserDefaults.standard.set("Go to Cart", forKey: "btn")
                print("Clicked")
                Clicked = true
                return
            }
        }
        
        if Clicked {
            print("Perform Action")
            let cart = self.storyboard?.instantiateViewController(withIdentifier: "CartViewController") as? CartViewController
            self.navigationController?.pushViewController(cart!, animated: true)
        }
    }

This is how I am trying to store the "Go to Cart" state. But not working.. please suggest!

Answer 1

Add this code to check cart is already added or not, If added change title according in your detail controller:

 override func viewWillAppear(_ animated: Bool) {
            if let info = detailInfo {
                let buttonTItle = (self.checkCartData(cartInfo: info) ? "Go to Cart"  : "Add to Cart")
                addToCartButton.setTitle(buttonTItle, for: .normal)
            }
        }

Next, Check before adding to cart. If already added, will navigate to cart page else add new cart item(changing button title too).

@IBAction func addToCartbtnTapped(_ sender: Any) {
            if let info = detailInfo {
                if checkCartData(cartInfo: info) {
                    let cart = self.storyboard?.instantiateViewController(withIdentifier: "CartViewController") as? CartViewController
                    self.navigationController?.pushViewController(cart!, animated: true)
                } else {
                    let cartData = CartStruct(cartItems: info, cartQuantity: 1)
                    self.saveCart(data: cartData)
                    showAlert()
                    (sender as AnyObject).setTitle("Go to Cart", for: .normal)
                }
            }
        }

Check Cart data here:

        func checkCartData(cartInfo: jsonstruct) -> Bool {
            guard let cart = self.getCartData() else { return false }
            return (cart.contains(where: { $0.cartItems.name == cartInfo.name }) ? true : false )
        }

Get all Cart Data with this method:

        func getCartData() -> [CartStruct]? {
            let defaults = UserDefaults.standard
            var tempCart: [CartStruct]?
            if let cdata = defaults.data(forKey: "cartt") {
                tempCart = try! PropertyListDecoder().decode([CartStruct].self, from: cdata)
            }
            return tempCart
        }