swift - 加载url图片

Question

我是 IOS 开发新手，我正在尝试从 URL 加载图像，我知道 swift 版本之间存在一些变化。 由于某种原因，我得到 imageData = nil 并且我不知道为什么..

 private func fetchImage() 
 {
    let url = URL(fileURLWithPath: "https://zgab33vy595fw5zq-zippykid.netdna-ssl.com/wp-content/uploads/2017/09/blog_1280x720.png")
    if  let imageData = NSData(contentsOf: url as URL){
            image = UIImage(data: imageData as Data)
    }   
  }

Answer 1

请检查:

private func fetchImage() {
    let url = URL(string: "https://zgab33vy595fw5zq-zippykid.netdna-ssl.com/wp-content/uploads/2017/09/blog_1280x720.png")!
    let task = URLSession(configuration: .default).dataTask(with: url) { (data, response, error) in
        if error != nil {
            print("Error Occurred: \(String(describing: error))")
        }
        else {
            if let imageData = data {
                let image = UIImage(data: imageData)
            } else {
                print("Image file is currupted")
            }
        }
    }
    task.resume()
}