CODEWITHSUNDEEP
iosswiftuitableview
Dean Lee
Dean Lee

Reputation: 821

Multiple Custom UITableViewCell using in tableView(_cellForRowAt:)

I have some custom UITableViewCell,and would using some of them randomly. But after I register them ,it will crashed in tableView(_cellForRowAt:). Here is my code: in viewDidLoad method

    tableView.register(CustomACell.self, forCellReuseIdentifier: "Identifier")
    tableView.register(CustomACell.self, forCellReuseIdentifier: "Identifier")

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let model = dataSource[indexPath.row]
    if let type = model.type {
        switch type {
        case .A:
            let cell = tableView.dequeueReusableCell(withIdentifier: MyIdentifier) as! CustomACell
            cell.assgin(message: model)
            return cell

        case .B:
            let cell = tableView.dequeueReusableCell(withIdentifier: MyIdentifier) as! CustomBCell
            cell.assgin(message: model)
            return cell
        }
    }
    let cell = tableView.dequeueReusableCell(withIdentifier: MyIdentifier) as! CustomACell
    cell.assgin(message: model)
    return cell
}

If I register both ,it will crashed at case .A. If I won't, some of them would crash at tableView.dequeueReusableCell. Here is one of the console error info:

Could not cast value of type 'TM.CustomACell' (0x10bb40940) to 'TM.CustomBCell' (0x10bb40578).

Upvotes: 1

Views: 122

Answers (2)

Nattudurai
Nattudurai

Reputation: 856

if you created a separate Nib, then you can register else no need to register

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

     var cell = UITableViewCell(style: .default, reuseIdentifier: "pgIdentifier")

     if (XXX == true) {

           let pgtcell = tableView.dequeueReusableCell(withIdentifier: "indetifier", for: indexPath) as! CustomCell1
     } else {

          let pgtcell = tableView.dequeueReusableCell(withIdentifier: "indetifier", for: indexPath) as! MyCustomCell1

     }
}

Upvotes: 1

GayashanK
GayashanK

Reputation: 1215

Change the CellReuseIdentifiers. You use same for both custom cells. Use diffrent identifires for diffrent cells.

enter image description here

var nibName = UINib(nibName: "Identifier1", bundle: nil)
        self.tableView.register(nibName, forCellReuseIdentifier: "Identifier")

nibName = UINib(nibName: "Identifier2", bundle: nil)
        self.tableView.register(nibName, forCellReuseIdentifier: "Identifier2")

Then change the cellForRowAt, try following code

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let model = dataSource[indexPath.row]
    if let type = model.type {
        switch type {
        case .A:
            let cell = tableView.dequeueReusableCell(withIdentifier: "Identifier1") as! CustomACell
            cell.assgin(message: model)
            return cell

        case .B:
            let cell = tableView.dequeueReusableCell(withIdentifier: "Identifier2") as! CustomBCell
            cell.assgin(message: model)
            return cell
       default : 
            let cell = tableView.dequeueReusableCell(withIdentifier: "Identifier1") as! CustomACell
            cell.assgin(message: model)
            return cell
        }
    }

}

Upvotes: 3

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