CODEWITHSUNDEEP
iosswift3nsurlsession
Gilchrist
Gilchrist

Reputation: 87

Ambiguous reference to member data task(with: completionHandler:)

Why I'm I getting an issue with my completion handler and how can I fix this? 

func loadImageusingCacheWithUrlString(urlString: String) {

    self.image = nil
    if let cachedImage = imageCache.object(forKey: urlString as AnyObject) as? UIImage {
        self.image = cachedImage
        return
    }

    let url = NSURL(string : urlString)

    URLSession.shared.dataTask(with: url!,
                               completionHandler: { (data, response, error) in
        if error != nil {
            print(error!)
            return
        }
        DispatchQueue.main.async(execute: {
            if let currImage = UIImage(data: data) {
                imageCache.setObject(currImage, forKey: urlString)
                self.image = currImage
            }

            //cell.imageView?.image = UIImage(data: data)
        })

    }).resume()

}

Upvotes: 0

Views: 1023

Answers (1)

yakovlevvl
yakovlevvl

Reputation: 524

Use this

let url = URL(string : urlString)

Also you may get an error "Value of optional type 'Data?' not unwrapped", so you should write:

if let currImage = UIImage(data: data!) {
     imageCache.setObject(currImage, forKey: urlString)
     self.image = currImage
}

Upvotes: 1

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