UICollectionViewCell with subview keeps redrawing itself in cell - ios

Question

I have a view where I do some drawing. I add a shape layer as a sublayer of the view's layer, then an image view as a subview of the view, and then curve the corners of the imageview's layer. It all works perfectly.
Now i need to use this view in a collectionviewcell, where i can set the image dynamically.
If i perform the work in draw rect it draws it self over and over on top of the other as the collection view scrolls.
I've tried a few other things, like creating a property on the cell for a uiimage, setting that as the imageview's image, and doing the drawing in a setter for it.
Does anyone have a suggestion about how to do this?
Update: Here's an example of the kind of thing im doing in the view
- (void)simplifiedDrawWithImage:(UIImage*)image
{
CAShapeLayer *circleLayer = [CAShapeLayer layer];
CGRect circleRect = self.bounds;
UIBezierPath *circlePath = [UIBezierPath bezierPathWithOvalInRect:circleRect];
circleLayer.path = circlePath.CGPath;
circleLayer.shadowOffset = CGSizeMake(0, shadowScale * length);
circleLayer.shadowOpacity = .5;
circleLayer.shadowRadius = shadowRadiusScale * length;
[self.layer addSublayer:circleLayer];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
// size appropriately
[self addSubview:imageView];
CALayer *imageLayer = imageView.layer;
[imageLayer setMasksToBounds:YES];
[imageLayer setCornerRadius:((imageView.frame.size.width - innerRing / 2) / 2)];
}

Answer 1

I use this:
UICollectionViewCell *cell = [collView dequeueReusableCellWithReuseIdentifier:#"Cell" forIndexPath:indexPath];
[cell.contentView.subviews makeObjectsPerformSelector: #selector(removeFromSuperview)];
At least, it SOUNDS like the same problem.

Answer 2

In your UICollectionViewCell, override -prepareForReuse and remove the previous image.
Update:
In your code, you have this line: [self.layer addSublayer:circleLayer]; which is adding a layer of drawing TO YOUR CELL. So later when you create a UIImageView and assign it an image, you still have created a drawing in the cell itself.
When that cell is recycled, that layer is still there, and then you add it again. Don't draw that layer on self, create that in a view then add that to the cell.