[英]Download image using SDWebImage, error -999 (or) SDWebImageErrorDomain Code=0 "Downloaded image has 0 pixels
[英]SDWebImage error downloaded image has 0 pixels
使用 SDWebImage 最新的 swift 库版本在加载几个 url 时出现以下错误
下载的图像有 0 像素
以下是代码
if let url = URL(string: storeImgStr.encoded), !(storeImgStr.isEmpty) {
self.storeImg.sd_setImage(with: url, placeholderImage: UIImage(named: Constants.storeImagePlaceorderImage)) {
(image, error, cahce, url) in
if(error != nil) {
}
}
}
else {
self.storeImg.image = UIImage(named: Constants.storeImagePlaceorderImage)
}
由于政策问题,我的 url 看起来像这样,无法共享确切的 url 域名已更改
https://tximages.mydomain.in/retailers_data_v2/retailer/320/3306-1-Aviator.jpg
以下是错误代码
Error Domain=NSURLErrorDomain Code=-1100 "(null)"
我也可以在网络浏览器中打开图片网址。
这里的问题究竟是什么?
以下扩展名用于编码 url
extension String {
var encoded: String {
return self.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) ?? ""
}
}
更新:能够在 Chrome 浏览器中打开上面的图片 URL,但无法在 Safari 浏览器中打开它是什么原因?
-1100
表示NSURLErrorFileDoesNotExist
。 还有一种可能性,服务器不会将文件返回到特定国家或由于urlString
特定符号。 在这种情况下,您可以应用以下编码: stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding
。 你也可以使用SDWebImageRetryFailed ,因为它的描述文档,详细了解此标志:
storeImg.sd_setImage(with: urlEncoded, placeholderImage: UIImage(named: Constants.storeImagePlaceorderImage), options: .retryFailed) { // handle result completion }
您可以使用以下方法测试断开的链接:
import UIKit
import SDWebImage
import WebKit
extension String {
var encoded: String {
return self.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) ?? ""
}
}
class ViewController: UIViewController {
let testURL = "https://i.groupme.com/638x640.jpeg.d4f31c747b534baca03d12db5a2b6193"
let testURLShouldEncode = "https://via.placeholder.com/468x60?text=Visit Blogging.com Now"
var storeImg: UIImageView!
var webView: WKWebView!
override func viewDidLoad() {
super.viewDidLoad()
configureUI()
if let urlEncoded = URL(string: testURLShouldEncode.encoded), !(testURL.isEmpty) {
storeImg.sd_setImage(with: urlEncoded, placeholderImage: UIImage(named: Constants.storeImagePlaceorderImage)) {
[unowned self] (image, error, cahce, url) in
print("image \(String(describing: image))")
print("error \(String(describing: error?.localizedDescription))")
print("cache \(cahce)")
print("url \(String(describing: url))")
if (error != nil) {
let request = URLRequest(url: urlEncoded)
self.webView.load(request)
}
}
} else {
self.storeImg.image = UIImage(named: Constants.storeImagePlaceorderImage)
}
}
func configureUI() {
storeImg = UIImageView()
storeImg.contentMode = .center
storeImg.translatesAutoresizingMaskIntoConstraints = false
webView = WKWebView()
webView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(storeImg)
view.addSubview(webView)
view.backgroundColor = .blue
storeImg.backgroundColor = .yellow
webView.backgroundColor = .orange
storeImg.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
storeImg.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
storeImg.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
storeImg.heightAnchor.constraint(equalToConstant: 300).isActive = true
webView.topAnchor.constraint(equalTo: storeImg.safeAreaLayoutGuide.bottomAnchor).isActive = true
webView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
webView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
webView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
}
}
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