如何使容器视图背景仅不是全部透明？

Question

I have container view above my view controller

and this container hold xib and have photos in this Xib

the problem is the photos is png and i want the container to be transparent to show me my view colour

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

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("TNImageCell", forIndexPath: indexPath) as! TNImageSliderCollectionViewCell
    cell.backgroundColor = UIColor.clearColor()
    cell.imageView.image = images[indexPath.row]
    cell.labelSliderName.text = sliderNames[indexPath.row]
    return cell

}

this sample how i fill the container

Answer 1

Try this: tableView.backgroundColor = UIColor.clearColor() and

let cell = collectionView.dequeueReusableCellWithReuseIdentifier("TNImageCell", forIndexPath: indexPath) as! TNImageSliderCollectionViewCell
cell.backgroundColor = UIColor.clearColor()
cell.imageView.image = images[indexPath.row]
cell.imageView.alpha = 0.5
cell.labelSliderName.text = sliderNames[indexPath.row]
return cell

Answer 2

您应该更改容器背景色的不透明度值，而不是alpha.Alpha值也将应用于所有子视图。