CODEWITHSUNDEEP
iosswiftuitableviewuiviewcontrollerswift2
EdouM
EdouM

Reputation: 33

Go to next cell of a table view from the viewcontroller

I have a question regarding a Swift project. I have a TableViewController with multiple cells, and when I click on them I go to a ViewController where data is passed from the tableViewController.

I want to implement a button in the ViewController that allows me to display the ViewController with the content of the "next cell" from the table view controller. For instance, I clicked on the 2nd cell of the table view controller, so I go to the ViewController that displays the data corresponding to that cell, and then when I click on that "next" button in the viewController I want to display the content of the 3rd cell of the table view controller. How do I do that in a clean way?

Here is the code I use to pass the data from tableViewController to ViewController :

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if let a = articles {
        return a.count
    }
    return 0
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) ->UITableViewCell{
    let cell = tableView.dequeueReusableCellWithIdentifier("ArticleCell", forIndexPath: indexPath)

    let article = articles?[indexPath.row]

    if let a = article {
        cell.textLabel?.text = a.articleName
        cell.textLabel?.font = UIFont(name: "Avenir", size: 18)
        cell.textLabel?.numberOfLines = 0
        if let i = a.tableViewImage {
            cell.imageView?.image = UIImage(named: i)
        }

    }

    return cell
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "ShowArticle" {
        let articleVC = segue.destinationViewController as? ArticleViewController

        guard let cell = sender as? UITableViewCell,
            let indexPath = tableView.indexPathForCell(cell) else {
                return
        }

        articleVC?.article = articles?[indexPath.row]
    }

    }

In the viewController, to show the right article, I wrote this in the viewDidLoad() (my viewController shows a web view of an article, and I have a class Article where articleLink comes from):

    if let a = article {
        articleWebView.loadRequest(NSURLRequest(URL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(a.articleLink, ofType: "html")!)))
    }

I have linked a nextButton in Main.Storyboard:

@IBOutlet weak var nextButton: UIButton!

I'm relatively new to Swift, and have no idea how to do it (my main problem is because I declare my data in the tableViewController, and I don't see how I could stay in the ViewController and "import" data from the tableViewController).

Upvotes: 1

Views: 960

Answers (1)

Nirav D
Nirav D

Reputation: 72410

Change your code of TableViewController's prepareForSegue like this

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "ShowArticle" {
        let articleVC = segue.destinationViewController as? ArticleViewController
        guard let cell = sender as? UITableViewCell, let indexPath = tableView.indexPathForCell(cell) else {
            return
        }
        articleVC?.articles = articles
        articleVC?.selectedIndex = indexPath.row
        articleVC?.article = articles?[indexPath.row]
    }
}

Now add two global variable in your ViewController like below also change your next button click like this

var articles: [article]!
var selectedIndex: Int!

//Now your button click
@IBAction func nextButtonClick(sender: UIButton) {
    if ((self.selectedIndex + 1) < self.articles.count) {
        self.selectedIndex++
        let nextArticle = self.articles[self.selectedIndex]
        articleWebView.loadRequest(NSURLRequest(URL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource(nextArticle.articleLink, ofType: "html")!)))
    }
}

I don't know you are using NSArray or Array so create the articles array object same as you created in TableViewController.

Hope this will help you.

Upvotes: 3

Related Questions