Search code examples
iosswiftnsuserdefaultsnsdocumentdirectory

saving and reading array of images with its data in NSUserDefaults or in Document Directory

I am trying to append image with its data in Array after downloading and then try to save in NSUserDefaults. But getting an error. I dont know what is proper way to save and read it . Can anyone please tell me how i can do this? Thanks

var imgIndex = 0
var imageArray : [UIImage] = []
typealias CompletionHandler = (image: UIImage) -> Void

downloadFileFromURL(NSURL(string: self.posts.objectAtIndex(indexPath.row).valueForKey("enclosure") as! String)!, completionHandler:{(img) in
                dispatch_async(dispatch_get_main_queue(), { () -> Void in
                    cell.sideImageView.image = img
                    imageArray.insert(img, atIndex: self.imgIndex) //.append(img)
                    self.imgIndex++
                    print("Image append with data")
                    self.newsDefaults.setObject(imageArray, forKey: "image")

                })
            })


func downloadFileFromURL(url1: NSURL?,completionHandler: CompletionHandler) {
    // download code.
    if let url = url1{
        let priority = DISPATCH_QUEUE_PRIORITY_HIGH
        dispatch_async(dispatch_get_global_queue(priority, 0)) {
            let data = NSData(contentsOfURL: url)
            if data != nil {
                print("image downloaded")
                completionHandler(image: UIImage(data: data!)!)
            }
        }
    }
}

enter image description here

Solution

  • You can't add images to user defaults, they aren't supported. You'll need to convert the image to data and save that instead (either to user defaults or, better, onto disk in a file...

    imageArray.insert(UIImageJPEGRepresentation(img, 0.75), atIndex: self.imgIndex)