Swift - load image from URL

Question

I'm creating a medicine database as practice and I would like to load image of pills from URLs.

Here is part of my code and it says

Cannot convert value of type '(NSURLResponse!, NSData!, NSError!) -> Void' to expected argument type '(NSURLResponse?, NSData?, NSError?) -> Void'

How am I supposed to fix it ? Thank you!

func img_URL(urlString:String)
    {

        var imgURL: NSURL = NSURL(string: urlString)!
        let request: NSURLRequest = NSURLRequest(URL: imgURL)
        NSURLConnection.sendAsynchronousRequest(
            request, queue: NSOperationQueue.mainQueue(),
            completionHandler: {(response: NSURLResponse!,data: NSData!,error: NSError!) -> Void in
                if error == nil {
                    self.pillsImage.image = UIImage(data: data)
                }
        })

    }

@LeoDabus It isn't, you know (a duplicate of that). – matt Mar 30 '16 at 03:20 — matt, Mar 30 '16 at 03:20

matt · Answer 1 · 2016-03-30T03:19:33.073

Do what the error message tells you! Change

completionHandler: {(response: NSURLResponse!,data: NSData!,error: NSError!) -> Void in

to

completionHandler: {(response: NSURLResponse?,data: NSData?,error: NSError?) -> Void in

Even better, abandon NSURLConnection. It is replaced by NSURLSession. The call you are making is deprecated and will be removed in a future system update (possibly as soon as this June).

score 1 · Answer 2 · edited Mar 30 '16 at 03:14

1

completionHandler: {(response: NSURLResponse?, data: NSData?, error: NSError?) -> Void in

will solve your issue

edited Mar 30 '16 at 03:14

matt

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answered Mar 30 '16 at 03:13

Steve Rosenberg

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Remarkably similar to my answer. – matt Mar 30 '16 at 03:13
LOL - did not see your answer the view of the page I had – Steve Rosenberg Mar 30 '16 at 03:14
I know! happens to me all the time too – matt Mar 30 '16 at 03:14
I pasted his code into a playground, fixed it and then added my answer. You responded in the interim. O well ... – Steve Rosenberg Mar 30 '16 at 03:15
I formatted your answer and upvoted it. :) – matt Mar 30 '16 at 03:15
By the way, the docs also would be enough: not need for the playground. https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Classes/NSURLConnection_Class/#//apple_ref/occ/clm/NSURLConnection/sendAsynchronousRequest:queue:completionHandler: – matt Mar 30 '16 at 03:15
yeah I up voted you too – Steve Rosenberg Mar 30 '16 at 03:16

Swift - load image from URL

2 Answers2