iOS: load an image from url

Question

I need to load an image from a url and set it inside an UIImageView; the problem is that I don\'t know the exact size of the image, then how can I show the image correctly?<

Answer 1

To download Asynchronous image with Kingfisher library you can follow this step,url :https://github.com/onevcat/Kingfisher:

 func imageFromUrl(_ urlString: String) {
        if let url = URL(string: urlString) {
            ImageDownloader.default.downloadImage(with: url, options: [], progressBlock: nil) {
                (image, error, url, data) in
                DispatchQueue.main.async {
                    self.imageView.image = image
                }
            }
        }
    }

You can also download image with default URLSession.shared.dataTask

 func imageFromUrl(_ urlString: String) {
        if let url = URL(string: urlString) {
            let request = URLRequest(url: url)
            URLSession.shared.dataTask(with: request) {(data,response,error) in
                if let imageData = data as Data? {
                    if let img = UIImage(data: imageData){
                       DispatchQueue.main.async {
                       self.imageView.image = img
                       }
                    }
                }
            }
        }
    }