Image url shows error while calling to display image in UITableview - ios

Question

I have stored the json image url in a array but while calling the url it shows error
Model class
import Foundation
class ProductDetails {
var productAuthor: String!
var productPrice: Int!
var artImages: [ArtImage]!
}
class ArtImage {
var imagepath: String!
var imgvideotype: Int!
}
TableView Controller Storage variable
var globalArr = [ProductDetails]()
Parsing function
func parseJSONData(data: NSData) -> [ProductDetails] {
var product_Detail = [ProductDetails]()
do {
let jsonResult = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers) as? NSDictionary
let jsonProductDetails = jsonResult?["data"] as! [AnyObject]
//print("the json response is",jsonProductDetails)
for jsonproductDetail in jsonProductDetails{
let productDetail = ProductDetails()
// let jsonProductImageDetails = jsonProductDetails["images"] as! [AnyObject]
productDetail.productAuthor = jsonproductDetail["first_name"]as! String
productDetail.productPrice = jsonproductDetail["prodprice"]as! Int
// Getting inside the json
let jsonProductImageDetails = jsonproductDetail["images"] as! [AnyObject]
var artImagesModelArray = [ArtImage]()
for image in jsonProductImageDetails {
let artImage = ArtImage();
artImage.imagepath = image["imagepath"] as! String
artImage.imgvideotype = image["imgvideotype"] as! Int
artImagesModelArray.append(artImage)
}
productDetail.artImages = artImagesModelArray;
product_Detail.append(productDetail)
}
}
catch {
print (error)
}
return product_Detail
}
Tableview DataSource
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellIdentifier = "Cell"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! UserHomeScreenTableViewCell
// Configure the cell...
cell.artsAuthorName.text = globalArr[indexPath.row].productAuthor
cell.priceLabel.text = "\(globalArr[indexPath.row].productPrice)"
let productDetailsObject = globalArr[indexPath.row].artImages
print("#################",productDetailsObject)
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), {
if let url = (NSURL(string: self.globalArr[indexPath.row])) {
//The error comes here....in self.global array
if let data = NSData(contentsOfURL: url) {
if let image = UIImage(data: data) {
dispatch_async(dispatch_get_main_queue()) { () -> Void in
cell.artImageView.image = image
}
}
}
}
})
return cell
}
Here i have stored the parse json and display some details in tableview cell upto here everything works fine .
but call async way to load images from array its shows error
any suggestion ..plz..
Thank you

Answer 1

You need to change the way how you're taking the image url from the ProductDetails.
I guess you need to use something like this:
if let url = NSURL(string: self.globalArr[indexPath.row].artImages[imageIndex].imagepath) { // your code }
Because when you perform
if let url = (NSURL(string: self.globalArr[indexPath.row]))
you get an object of ProductDetails, but not an image url.