Ibdesignable and Uitableviewcell

IBDesignable never finishes updating UITableViewCell in storyboard

This issue has been resolved as of Xcode 9.

I had reported this issue to Apple and at least have the piece of mind knowing that this is a known bug. It is currently an open issue under the problem ID 17973876.

Edit: As of 12/7/2016 this bug is still marked as open.

Swift 3: Designable table view cell

I think there are a couple of possible issues you can look into here. First, whenever you create a custom view you will need to associate it with the xib file name.

func setupNib(){
    let bundle = Bundle(for: ProgressHeaderTableViewCell.self)
    guard let customView = bundle.loadNibNamed("NAME_OF_XIB_FILE_GOES_HERE",owner: self, options: nil)?.first as? ProgressHeaderTableViewCell else {
         return 
    } 
    customView.frame = self.bounds
    self.addSubview(customView)
}

Also, whenever I work with xib files, I do any view setup within the awakeFromNib() method after checking to make sure one of the expected elements is not nil.

override func awakeFromNib() {
    if headerLabel != nil {
        self.backgroundColor = UIColor.blue
        self.headerLabel.text = "Hello world"
    }
}

Finally, I've only been able to get IBDesignables to work when I wrap the setup functions with the a check that there are no current subviews:

override public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)
    //check that there are no current subviews 
    if self.subviews.count == 0 {
        self.setupNib()
    }
}

// MARK: - NSCoding
required public init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)

    //check that there are no current subviews 
    if self.subviews.count == 0 {
        self.setupNib()
    }
}

P.S When I was learning this, I found this blog post super helpful. You may want to read through it yourself to get a handle on IBDesignable and custom views. http://supereasyapps.com/blog/2014/12/15/create-an-ibdesignable-uiview-subclass-with-code-from-an-xib-file-in-xcode-6

IB Designables for storyboard UITableViewCell: Failed to render and update auto layout status for CountdownViewController The agent crashed

This is happening because your dummyView is an IBOutlet and is implicitly unwrapped. prepareForInterfaceBuilder will be called before dummyView is initialized. You can prevent a crash by changing your code to dummyView?.backgroundColor = .red but then nothing will be rendered because dummyView == nil.

It doesn't make a ton of sense to mix IBDesignable with IBOutlet. In general, IBDesignable is meant to make run time layout and drawing visible at design time. But IBOutlets are necessarily already visible at design time. This might however be desirable in a xib. For a discussion of that see here and here.

Navigate to ViewController from @IBDesignable UIView didSelectRowAt UITableView

Your UITableView is a UIView so it's not a UIViewController and has not UINavigationController.

You should create a delegate in your UITableView that will be implemented by your UIViewController.

Something like that :

protocol MyTableViewDelegate: class {
    func didSelectRow(url: String, titleText: String)
}

Add a delegate variable in your table view like :

weak var delegate: MyTableViewDelegate?

and call your delegate like this :

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let actionType = AppData?.items?[indexPath.row].actionType

    switch actionType {
    case 5:
        print(actionType ?? 0)
        let urlLink = AppData?.items?[indexPath.row].actionUrl
        let titleText = AppData?.items?[indexPath.row].textValue
        self.delegate.didSelectRow(url: url, titleText: titleText)
    default:
        print(actionType ?? 0)
    }
}

In your view controller :

you should add your table view custom class into your ViewController,

then add delegate : yourTableView.delegate = self

implement delegate :

extension MyViewController: MyTableViewDelegate {
    func didSelectRow(url: String, titleText: String) {

        let vc = storyboard.instantiateViewController(withIdentifier: "WebViewController") as! WebViewController
        vc.url = urlLink
        vc.titleText = titleText
        self.navigationController.pushViewController(vc, animated: true)
    }
}

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