CODEWITHSUNDEEP
iosswiftxcode
The Retro Gamer
The Retro Gamer

Reputation: 133

Defining Instances of 'Cell' Inside of If Statements - Swift

I want to be able to change the definition of my cell to read off different custom cell classes. I have tried referring to this post and reading the chat, but to no avail. Here is my code for defining the cell variable

guard let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as? DiscussionTableViewCell else {fatalError("Unable to create cell")}

I also referred to this post to potentially have a variable equal the class that is changing using this code

let customCell = DiscussionTableViewCell.self
guard let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as? customCell else {fatalError("Unable to create cell")}

However I get an error 'Use of undeclared type 'customCell''. I don't mind if the solution is changing a variable to refer to the right class or just have the change inside an if statement, but no solutions have tried actually worked. It would be nice if I could simply do something like this:

    if (singlePageVar == 2) {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as? DiscussionTableViewCell else {fatalError("Unable to create cell")}
        cell.discussionTitleLabel.text = discussionTitles[indexPath.row]
        cell.discussionDescriptionLabel.text = discussionDescriptions[indexPath.row]
    }
    if (singlePageVar == 25) {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as? DiscussionTableViewCell else {fatalError("Unable to create cell")}
        //assign different things here
    }
    return cell

but no matter how I define cell above this code such as let cell: UITableViewCell and then change it in the if statement there is always the same error.

Upvotes: 1

Views: 498

Answers (2)

vadian
vadian

Reputation: 285069

If you have the same custom cell type but different content create the cell before the first if statement.

And force downcast the cell, it has the same effect as the guard / fatalError syntax.

let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! DiscussionTableViewCell

if singlePageVar == 2 {
    cell.discussionTitleLabel.text = discussionTitles[indexPath.row]
    cell.discussionDescriptionLabel.text = discussionDescriptions[indexPath.row]
}
else if singlePageVar == 25 {
    //assign different things here
}
return cell

However if you have different cell types you have to create and return the cells separately

if (singlePageVar == 2) {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! DiscussionTableViewCell        cell.discussionTitleLabel.text = discussionTitles[indexPath.row]
    cell.discussionDescriptionLabel.text = discussionDescriptions[indexPath.row]
    return cell
}
else if (singlePageVar == 25) {
    let cell = tableView.dequeueReusableCell(withIdentifier: "otherCell", for: indexPath) as! OtherTableViewCellelse
    //assign different things here
    return cell
}
return UITableViewCell()

And once again:

You are strongly discouraged from using multiple arrays as datasource.

Upvotes: 1

Anil Kumar
Anil Kumar

Reputation: 1984

You can use like this: 

let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as? DiscussionTableViewCell  
if (singlePageVar == 2) {
        cell.discussionTitleLabel.text = discussionTitles[indexPath.row]
        cell.discussionDescriptionLabel.text = discussionDescriptions[indexPath.row]
    }
    if (singlePageVar == 25) {
        //assign different things here
    }
    return cell

Upvotes: 0

Related Questions