CODEWITHSUNDEEP
iosuitableviewswift
A_toaster
A_toaster

Reputation: 1288

How can you add a CAGradientLayer to a cell in a tableview from within the cells' awakeFromNib() method?

I have been adding CAGradient layers to cells using this code:

let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as myCell

cell.mImageView.image = UIImage(named: scripts[indexPath.row].thumbnailImage)

let gradientLayer = CAGradientLayer()

if(cell.layer.sublayers.count == 2){ //This is to stop stacking gradient layers
  gradientLayer.colors = [UIColor.clearColor().CGColor, UIColor.blackColor().CGColor]
  gradientLayer.locations = [0.6, 1.0]
  gradientLayer.frame = cell.bounds
  cell.layer.insertSublayer(gradientLayer, below: cell.mImageView.layer)
}

This is from within the tableView(_:cellForRowAtIndexPath) method of my CustomTableViewController class.

I have a myCell class that I would much rather use to perform the gradient layout, but I cannot use this code or the cell object from within the awakeFromNib() method.

How can I insert this CAGradientLayer from within the awakeFromNib (or init()) method of the myCell class? The cell also contains a label and I would like to insert it beneath the label as well.

Upvotes: 0

Views: 1651

Answers (1)

rdelmar
rdelmar

Reputation: 104082

I don't know why you would get that error. I tried a slight modification of your code (in the cell class), and it worked ok. Here it is,

class RDTableViewCell: UITableViewCell {

    @IBOutlet var mImageView: UIImageView!

    override func didMoveToSuperview() {

        let gradientLayer = CAGradientLayer()

        gradientLayer.colors = [UIColor.clearColor().CGColor, UIColor.blackColor().CGColor]
        gradientLayer.locations = [0.6, 1.0]
        gradientLayer.frame = self.bounds
        self.layer.insertSublayer(gradientLayer, below: self.mImageView.layer)
    }
}

I assumed that you want the gradient at the bottom of the cell, and that did not happen with my cells (which had a height of 70) if I put the code in awakeFromNib.

Upvotes: 4

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