从选定的集合视图单元格获取信息

Question

I am trying to print the cell.image.text from collection view cell.

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
    {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! CollectionViewCell

        let post = self.arrayOfDetails[indexPath.row]
        cell.currentUserLabel.text = post.username
        cell.imageText.text = post.text

        cell.uploadedTimeLabel.text = post.CreatedAt.timeAgo

        cell.imageView.setImageWithUrl(NSURL(string: post.image)!, placeHolderImage: UIImage(named: "Placeholder"))

        return cell
    }

ArrayOfDetails:

var arrayOfDetails = [Details]()

Details:

struct Details {
    var username:String!
    var text:String!
    var CreatedAt:NSDate!
    var image:String!
    init(username:String,text:String,CreatedAt:NSDate,image:String){

        self.username = username
        self.text = text
        self.CreatedAt = CreatedAt
        self.image = image
    }
}

This is like a Instagram app, so there are multiple cells with photos and photo text, and i have a button, and when the button is pressed, it want to println(cell.image.text) . How can i do this?

I tried:

@IBAction func printButton(sender: AnyObject) {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: nil) as! CollectionViewCell

        println(cell.imageText.text)
    }

But it did not show any text.

Answer 1

Instead of trying to get the cell what if you just got the data itself? Don't look at the collectionView (emphasis on View ), instead pull up data from the Data Source.

You could use

- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath

and in that method call

println(self.arrayOfDetails[indexPath.row].text)

if you wanted to print out the text when the user selects the cell.

Answer 2

Excuse my syntax errors, I've never done swift :D

First of all you create a CustomCollectionViewCell, which subclasses CollectionViewCell.

Now in the header, give it a printButton property :

var printButton: UIButton!

Then in the CustomCollectionViewCell class implementation :

// This is lazy loading, everytime something needs to talk to the printButton 
// of a cell, it checks if this button exists. If not, it will be created.
lazy var printButton: UIButton = 
{
    var temporaryButton: UIButton = UIButton()
    temporaryButton.frame = self.contentView.bounds;
    temporaryButton.addTarget(self action: @selector(printText), forControlEvents: TouchUpInside);
    self.contentView.addSubview(temporaryButton);
    return temporaryButton;
}()

    return _printButton;
}

Then you remove your printButton when your subclassed cell is reused:

func prepareForReuse()
{
    super.prepareForReuse();

    self.printButton.removeFromSuperview().
    self.printButton = nil;
}

Finally you implement your printText function

func printText()
{
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: nil) as! CollectionViewCell

    println(cell.imageText.text)
}