Achieve button click in UICollectionView

Question

Is there a way I can get the button click event from a button inside a UICollectionViewCell? I used a nib to populate the collection view, the cell has the butt

Answer 1

Add the button action like this:

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

    CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CellId" forIndexPath:[indexPath row]]; 

    [[cell myButton] addTarget:self action:@selector(myClickEvent:event:) forControlEvents:UIControlEventTouchUpInside];

    return cell;

}


- (IBAction)myClickEvent:(id)sender event:(id)event {

    NSSet *touches = [event allTouches];

    UITouch *touch = [touches anyObject];

    CGPoint currentTouchPosition = [touch locationInView:_myCollectionArray];

    NSIndexPath *indexPath = [_myCollectionArray indexPathForItemAtPoint: currentTouchPosition];

}

Answer 2

Here is swift 3.1 code

// make a cell for each cell index path
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    // get a reference to our storyboard cell
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath as IndexPath) as! BlueCircleViewCell

    // Use the outlet in our custom class to get a reference to the UILabel in the cell
    cell.bgImage.image = UIImage(named: items[indexPath.row])
    cell.addButton.addTarget(self, action: #selector(addCircle(_:)), for: .touchUpInside)

//        cell.backgroundColor = UIColor.cyan // make cell more visible in our example project

    return cell
}

func addCircle(_ sender:UIButton){
    //CGPoint buttonPosition = [sender convertPoint:CGPointZero toView:self.tableView];
    let buttonPosition:CGPoint = sender.convert(.zero, to: self.collectionView)
    let indexPath:IndexPath = self.collectionView.indexPathForItem(at: buttonPosition)!
    onAddBlueCircle(indexPath: indexPath)
}

Answer 3

It is important that you create the cell in the Nib by dragging a "Collection View Cell" from the Objects panel. If you use an UIView and just change the class for this cell in the Identity Inspector then the action will not work.