Loading/Downloading image from URL on Swift

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I’d like to load an image from a URL in my application, so I first tried with Objective-C and it worked, however, with Swift, I’ve a compilation error:

‘imageWithData’ is unavailable: use object construction ‘UIImage(data:)’

My function: 

@IBOutlet var imageView : UIImageView

override func viewDidLoad() {
    super.viewDidLoad()

    var url:NSURL = NSURL.URLWithString("http://myURL/ios8.png")
    var data:NSData = NSData.dataWithContentsOfURL(url, options: nil, error: nil)

    imageView.image = UIImage.imageWithData(data)// Error here
}

In Objective-C: 

- (void)viewDidLoad {
    [super viewDidLoad];

    NSURL *url = [NSURL URLWithString:(@"http://myURL/ios8.png")];
    NSData *data = [NSData dataWithContentsOfURL:url];

    _imageView.image = [UIImage imageWithData: data];
    _labelURL.text = @"http://www.quentinroussat.fr/assets/img/iOS%20icon's%20Style/ios8.png";
 }

Can someone please explain me why the imageWithData: doesn’t work with Swift, and how can I solve the problem.

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