CODEWITHSUNDEEP
iosswiftiphonexcode
Charles Xavier
Charles Xavier

Reputation: 41

How to access a superview's view controller from a child view

I'm creating a UIView that will have a UITableView inside it. I want to set this UITableView delegate and data source equal to the view controller of its superview.

Code:

import UIKit

class AllTasksView: UIView {

    let tableview = UITableView()

    override init(frame: CGRect) {
        super.init(frame: frame)

    }


    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

    }
     override func didMoveToSuperview() {
    tableview.delegate = "SUPERVIEW.ViewController"
    tableview.dataSource = "SUPERVIEW.ViewController"
}

Is it possible to do so like this? and where is it best to override the UITableview methods? I have already done so in my UIViewController.

Upvotes: 1

Views: 989

Answers (1)

Joshi
Joshi

Reputation: 873

Due to separation of concerns, you cannot access a UIViewController from a UIView.

Alternatively, you can use delegation to access the UIViewController 

   class AllTasksView{
       weak var delegate: UITableViewDataSource & UITableviewDelegate?{
           didSet{
               tableView.delegate = newValue
               tableView.dataSource = newValue
           }
       }


   }

ADDITIONAL

       class CustomVC: UIViewController, UITableViewDelegate, UITableViewDataSource{
          //implement tableview methods here 


           func viewDidLoad(){
               super.viewDidLoad()

              let allTasksView = AllTasksView()
              view(addSubview: allTasksView)

              //add some positioning and size constraints here for allTasksView 

              allTasksView.delegate = self //this would call the didSet and would automatically setup the allTasksView.tableView's delegate and dataSource to this vc
           }
       }

Upvotes: 1

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