Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial


Santiago Lopez
Santiago Lopez
3,446 Points

What is the problem? CreateWrappedSurface() failed for a dataprovider-backed CGImageRef.

I made this app that changes the filter of the image. The problem is that when I test it, it says this "CreateWrappedSurface() failed for a dataprovider-backed CGImageRef."

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var dogImageView: UIImageView!

let context = CIContext(options: nil) @IBAction func ApplyFilter(sender: AnyObject) {

let inputImage = CIImage(image: dogImageView.image!)

    let randomColor = [kCIInputAngleKey : (Double (arc4random_uniform(314)) / 100)]

    let filteredImage = inputImage?.imageByApplyingFilter("CIHueAdjust", withInputParameters: randomColor)

let renderedImage = context.createCGImage(filteredImage!, fromRect: (filteredImage?.extent)!)

dogImageView.image = UIImage(CGImage: renderedImage)

override func viewDidLoad() {
    // Do any additional setup after loading the view, typically from a nib.

override func didReceiveMemoryWarning() {
    // Dispose of any resources that can be recreated.