Swift: How to use “didSelectItemAtIndexPath” in UITableViewController(contains UICollectionView)?

Question

I have a UITableViewController, inside the TableViewCell, it\'s a UICollectionView. I want to pass the data from the CollectionV

Answer 1

The way you are going is correct, but you are creating one mistake.Try to implement UICollectionViewDelegate method didSelectItemAtIndexPath also inside TableViewCell and remove it from the HomePageTableViewController.

Now declare one protocol, after that create its instance inside TableViewCell and implement the protocol in the HomePageTableViewController, after that in the didSelectItemAtIndexPath use that delegate instance to call the method like this.

protocol PostDelegate {
    func selectedPost(post: Posts)
}

Now create its instance inside TableViewCell and call this delegate method in the didSelectItemAtIndexPath.

class TableViewCell: UITableViewCell, UICollectionViewDataSource, UICollectionViewDelegate {
     var posts1: [Posts] = [Posts]()
     var posts2: [Posts] = [Posts]()
     var categories: [Category] = [Category]()
     var selectedPost1: Posts?  
     var postDelegate: PostDelegate?

     func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
         postDelegate?. selectedPost(self.posts1[indexPath.row])
     }
}

Now implement this PostDelegate protocol inside HomePageTableViewController

class HomePageTableViewController: UITableViewController,UICollectionViewDelegate { 


     //Your code 

     func selectedPost(post: Posts) {
         //You will get your post object here, do what you want now
     }
}

Note: Inside cellForRowAtIndexPath don't forgot to set the delegate of postDelgate with your HomePageTableViewController like this

tableViewCell.postDelegate = self

Edit:

func selectedPost(post: Posts) {
    //You will get your post object here, do what you want now
    self.performSegueWithIdentifier("goToDetail", sender: post)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    let post = sender as! Posts
    let postDetailPage = segue.destinationViewController as? DetailViewController
    postDetailPage.passPost = post
}

Answer 2

So, You have not implemented the

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
...
}

and

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell  

methods in your second implementation. Also, try putting an invisible button over the collection view cell and assign the tag to be the indexpath of that collectionview cell like this:

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell  
{
....
myButton.tag = indexpath.item
}

After this you may either implement a delegate callback from collectionviewcell class to the homepagetableviewcontroller class or push the detail view controller directly by code.

As far as setting of image in the detail view controller is concerned. You can do it both in viewdidLoad() or viewDidAppear(). Its fine.