UIImage from array with URL - arrays

Question

i currently developping an app which retrieve url from JSON, and create some ImageView with the URLS.
When i decode my JSON, i stock every URL into an array.
The problem is, how can i create an ImageView for each URLS which are in my array ?
This is my code :
if(success == 1)
{
DataFromJSon = jsonData["objects"] as! NSArray
repos.removeAll()
for one in DataFromJSon {
let repo = Repository(jsonData: one as! [String : AnyObject])
repos.append(repo)
}
for repo in repos {
lines.insert(repo.picture_url, atIndex: i)
dump(lines)
i++
}
//Construct the imgUrl to get an image URL for the pages
if let urlString: NSString = MyArray {
if let url = NSURL(string: urlString as String) {
if let data = NSData(contentsOfURL: url) {
newCard.image = UIImage(data: data)!
newCard.content = titleApp
newCard.desc = prixApp
self.data.append(newCard)
NSLog("fetch new data")
}
}
}
}
Thank you !
Watch out :

Answer 1

Here is a minimum working example
var urls = [NSURL]()
urls.append(NSURL(string: "https://yourimage1")!)
urls.append(NSURL(string: "https://yourimage2")!)
for url in urls {
dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0)) {
if let data = NSData(contentsOfURL: url) {
let image = UIImage(data: data)!
let view = UIImageView(image: image)
dispatch_async(dispatch_get_main_queue()) {
// Display your view here
}
}
}
}
As referred to by #Abizern, you should put the downloading of the data in a background queue, and use the main queue for updating the UI. You can scale the image by setting the size of the UIImageView and then using .ScaleAspectFit or .ScaleAspectFill on the contentMode property according to your needs.
Edit
I just tested it with the imagelinks you provided, and the code works fine.
var urls = [NSURL]()
urls.append(NSURL(string: "http://www.parkers.co.uk/Images/PageFiles/74655/firstdrive9.jpg")!)
urls.append(NSURL(string: "http://www.rsiauto.fr/images/BMW/330-Ci/330-Ci-1.jpg")!)
var i = 0
let width = self.view.frame.width/2
let height = self.view.frame.height
for url in urls {
dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0)) {
if let data = NSData(contentsOfURL: url) {
let image = UIImage(data: data)!
let frame = CGRectMake(CGFloat(i++)*width, 0, width, height)
i++
let view = UIImageView(image: image)
view.frame = frame
view.contentMode = .ScaleAspectFit
view.layer.masksToBounds = true
view.backgroundColor = UIColor.redColor()
dispatch_async(dispatch_get_main_queue()) {
self.view.addSubview(view)
print("Done")
}
}
}
}
Here a screenshot