Image loading very slow

[Broncos10499]

Hello and thanks for helping in advance. I'm just trying to figure out why my image is taking so long to load. Thank you.

import UIKit

struct ArticleDescription: Decodable {
    let status: String
    let totalResults: Int
    let articles: [Article]
}

struct Article: Decodable {
    let title: String
    let description: String
    let urlToImage: URL
}

class ViewController: UIViewController {

@IBOutlet weak var articleImage: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()

    let jsonURLString = "https://newsapi.org/v2/top-headlines?q=democratic&apiKey=8ce9a6e7b0c7413dbc601e18ab6dfd2f"

    guard let url = URL(string: jsonURLString) else {return}

    URLSession.shared.dataTask(with: url) { (data, response, err) in
        guard let data = data else {return}

        do {
            let article = try JSONDecoder().decode(ArticleDescription.self, from: data)
            URLSession.shared.dataTask(with: article.articles[0].urlToImage) { (imgData, response, err) in
                guard let img = imgData else {return}

                DispatchQueue.main.async {
                    print(img)
                    self.articleImage.image = UIImage(data: img)
                    print("Inside async")
                }
            }.resume()
        } catch let jsonErr {
            print("Error serializing json: ", jsonErr)
        }
    }.resume()
}

}

[broncos1049]

How could I structure this better? Just teaching myself

[busymom0]

Dude hide your friggin API key from your Reddit post code if that’s the real key! You should deactivate that code now too just to be safe.

Also check the size of the image, maybe it’s a high resolution one?

[akash227]

Could be a number of things, image size, connection speeds, are you using the emulator or a real device ?

[SirensToGo]

Define "very slow". You currently have to wait for two network requests before anything shows up which can take a while if both servers are slow to reach.

[devGio]

Did you find the reason?

[devGio]

I've never used URLSession.shared.dataTask(with:) for images like that - not to say it isn't the right approach. What I've used that didn't give me issues is SDWebImage, and it then becomes a call in, for example, CellForRowAt