CODEWITHSUNDEEP
iosswift
Rustam Tadjibaev
Rustam Tadjibaev

Reputation: 1

How to pass data to another viewcontroller's function using segues?

I want to pass data from one ViewController to function in another ViewController. Function init must take input from first view controller and assign it to goalDescription and goalTypes variables.

I do the following:

First ViewController

 @IBAction func nextBtnPressed(_ sender: Any) { 
     if goalTextView.text != "" {
            guard let finishGoalVC = storyboard?.instantiateViewController(withIdentifier: "FinishGoalVC") as? FinishGoalVC else { return }
            finishGoalVC.initData(description: goalTextView.text!, type: goalType)            
            performSegue(withIdentifier: "finishGoalVC", sender: self)

Second ViewController

 var goalDescription: String!
 var goalType: GoalType!  

    func initData(description: String, type: GoalType) {
        self.goalDescription = description
        self.goalType = type
    }

What am I doing wrong and what would you recommend me to do?

Upvotes: 0

Views: 54

Answers (1)

Soroush
Soroush

Reputation: 561

In order to pass data between ViewControllers appropriately, you need to override prepare(for:sender:) function.

In your case:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "finishGoalVC" { //in case you have multiple segues
        if let viewController = segue.destination as? FinishGoalVC {
            viewController.goalDescription = goalTextView.text! // be careful about force unwrapping.
            viewController.goalType = type  
        }
    }
}

Upvotes: 1

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