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I have parsed data from JSON link in a data source file how can I use that data to display information in the main view controller.

Nikhilesh Anand
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  • Please add more information. where you are getting data? does you want to show in previous controller of navigation stack or on the same controller? – Mahak Mittal Feb 12 '19 at 10:16
  • Using delegate method how can I access the data from the data source file. Access data of one class into another class. From JSON link I am parsing data and want to display the data in the from another class – Nikhilesh Anand Feb 12 '19 at 10:16
  • Possible duplicate/related: https://stackoverflow.com/questions/24222640/passing-data-between-view-controllers-in-swift – Scriptable Feb 12 '19 at 10:17
  • I have added an answer how delegate works. Hope this helps – Mahak Mittal Feb 12 '19 at 10:26
  • When asking a question, you should show us some code of what you've tried and enter far more details of exactly what you're trying to do. That means that the community can give you a more precise answer rather than having to make some assumptions on the detail and possibly give answers that are not relevant to you. Here is a link to some help on how to ask a good question: https://stackoverflow.com/help/how-to-ask – Swinny89 Feb 12 '19 at 10:45

2 Answers2

1

//Create protocol in second class from where you want to send data to previous one

protocol SampleDelegate: class {
  func getData(data: YourDataType)
}

//Your sample class/ViewController

class SampleViewController: UIViewController {
// MARK:- Delegate
weak var delegate: SampleDelegate?

//From where you want to send data

 delegate?.getData(data: Data)
}

//Main Class/ViewController

let detailViewController = self.storyboard?.instantiateViewController(withIdentifier: "SampleViewController") as! SampleViewController
detailViewController.delegate = self
    self.navigationController?.pushViewController(detailViewController, animated: true)

func getData(data: YourDataType){
     //This function get called when you call this method from Smapleview controller
}
AtulParmar
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Mahak Mittal
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1

I assume that,you want to pass data from VCB To VCA

IMPLEMENT DELEGATION

Create a protocol at the very top of VCB.

protocol VCBDelegate {
    func passingName(string: String)
}

Now inside of our VCB class, we need to declare a delegate variable.

var delegate: VCBDelegate?

Then inside of btnPassDataPressed function, add the following code:

delegate?. passingName(string: "Sent from VCFinal")

 adopt our VCBDelegate protocol. In VCA and make delegate self in viewDidLoad

class VCA: UIViewController, VCFinalDelegate

Go ahead and add the passingName function inside of VCA.

func passingName(string: String) {
   print("Notified")
}