Swift-将UIVIewcontroller可变数组访问到UITableViewCell类

Question

I have a UIViewController which contains the UITableView , Have created the separate class for UITableViewCell according to my logic I want to pass the array for every row. So I have created one mutable array and assigning the new values whenever the cell for method called.

But the mutable array I can't able to access from the UITableViewCell class

I have used the below code

class PostPage: UIViewController{
    public var imageArray = [String] ()
}

extension PostPage: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 10
    }


    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if self.UserDatas?.posts.app[indexPath.row].images?.count ?? 0 > 0 {
            let cell:PostImageCell = tablView.dequeueReusableCell(withIdentifier: "PostImageCell") as! PostImageCell
            self.imageArray = self.UserDatas?.posts.app[indexPath.row].images ?? ["String URL"]
            cell.selectionStyle = .none
            return cell
        }
    }

    class PostImageCell: UITableViewCell{
        override func awakeFromNib() {
            super.awakeFromNib()
            var mainClass : ViewController = ViewController()
            let image = self.mainClass.imageArray
        }
    }
}

Here am I getting the error saying like "Value of type 'ViewController' has no member 'imageArray'" .

Answer 1

Your code cannot work.

Do it the other way round and pass the array in cellForRow

class PostImageCell: UITableViewCell {
    var imageArray = [String]()
}

---

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

   let cell = tableView.dequeueReusableCell(withIdentifier: "PostImageCell") as! PostImageCell
   cell.imageArray = self.UserDatas?.posts.app[indexPath.row].images ?? []
   cell.selectionStyle = .none
   return cell
}

Answer 2

First you have no VC named ViewController

var mainClass : ViewController = ViewController()
let image = self.mainClass.imageArray

Second you either make the array global

class Service {
   static let shared = Service()
   var imageArray = [String] ()
}

Then use it like this inside all the app

Service.shared.imagArray

Or create another one inside the cell custom class

class PostImageCell: UITableViewCell{
      var imageArray = [String] ()
}

and assign it in cellForRowAt

let cell = //
cell.imageArray = imageArray 

Answer 3

It's right! "Value of type 'ViewController' has no member 'imageArray'"

PostPage has it!!!

change this: var mainClass: ViewController = ViewController()

to this: var mainClass: PostPage = PostPage()

That error will gone.

But remember: it's new initialized object and contains nothing by itself.