IOS WKWebView文件上载无法工作

我试图在WKWebView中运行一个web应用程序，在我选择照片库中的图像后，它会返回主页，而不会上载图像。我得到的信息如下：

2018-02-11 14:35:22.870494-0200网球[7144:194670][MC]阅读私人有效用户设置。 2018-02-11 14:35:44.753840-0200网球[7144:195114][discovery]发现扩展时遇到错误：Error Domain=PlugInKit Code=13 query cancelled UserInfo={NSLocalizedDescription=query cancelled}

我的代码：

import UIKit
import WebKit
class ViewController: UIViewController, UIImagePickerControllerDelegate,UINavigationControllerDelegate {

    @IBOutlet weak var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func viewDidAppear(_ animated: Bool) {

        let url:URL = URL(string: "http://serivinho:8001/")!
        let urlRequest: URLRequest = URLRequest(url: url)
        webView.load(urlRequest);
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    override func dismiss(animated flag: Bool, completion: (() -> Void)?)
    {
        if self.presentedViewController != nil {
            super.dismiss(animated: flag, completion: completion)
        }
    }
}

我的信息列表

---

当我将代码从viewdidebeen移动到viewdideload时，问题似乎消失了

   override func viewDidLoad() {

        let url:URL = URL(string: "http://serivinho:8001/")!
        let urlRequest: URLRequest = URLRequest(url: url)
        webView.load(urlRequest);
    }

我还将目标版本更改为10.3，并在代码中添加了WKWebView，而不是在MainstryBoard中

我仍然收到一些日志消息，但它们没有阻止工作：

18-02-11 20:25:01.535257-0200 Tennis[406:75090] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
2018-02-11 20:25:01.537713-0200 Tennis[406:75090] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
2018-02-11 20:25:10.228575-0200 Tennis[406:75090] [Generic] Creating an image format with an unknown type is an error
2018-02-11 20:25:52.676053-0200 Tennis[406:75090] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
2018-02-11 20:25:52.676252-0200 Tennis[406:75090] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
2018-02-11 20:25:58.340272-0200 Tennis[406:75090] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction
2018-02-11 20:25:58.340458-0200 Tennis[406:75090] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction

---

我一直有这个问题，因为我也有我的webView.loadurlRequest；在视图中出现

正如您所提到的，您需要添加webView.loadurlRequest；仅在viewDidLoad中

---

原因是，调用库或相机将打开操作系统对话框以拾取或拍摄照片，一旦完成此操作，ViewController将再次调用ViewWillDisplay和ViewDidDisplay回调，这将重新触发初始webview加载刷新页面。

正如marc_ferna所说，了解webview在从“选择图片”对话框回调后重新加载是非常重要的。因此，如果你把它放在某个不在ViewDiLoad ViewDiDisplay中的地方，例如，你的网页在“选择图片”对话框之后重新加载，但没有在web上完成上载。

这很好，我也遇到了同样的问题。非常感谢。