ios - 对成员 'first(where)' 的模糊引用

Question

我正在将 UIWebView 迁移到 WKWebView。更改所有内容后面临一个错误 对成员“first(where)”的引用不明确。帮我解决这个问题。

UIWebView

func share(sender: UIWebView) {
        if let url: URL = webViews.first?.request?.url {
            do {
                let base64Data = try Data(contentsOf: url)
                let documentURL = try savePDF(base64Data)
                documentInteractionController = UIDocumentInteractionController(url: documentURL)
                documentInteractionController?.presentOptionsMenu(from: shareButton, animated: true)
            } catch {
                displayAlert(Localizations.Error, message: Localizations.Apierror, responder: nil, completion: nil)
            }
        }
    }

我把上面的代码改成了WKWebView

WKWebView

func share(sender: WKWebView) {

        if let url: URL = webViews.first?.load?.url
        {
            do {
                let base64Data = try Data(contentsOf: url)
                let activityController: UIActivityViewController = UIActivityViewController(activityItems: [base64Data], applicationActivities: nil)
                present(activityController, animated: true, completion: nil)
            } catch {
                displayAlert(Localizations.Error, message: Localizations.Apierror, responder: nil, completion: nil)
            }
        }
    }

在这一行中遇到错误 if let url: URL = webViews.first?.load?.url

Answer 1

WKWebView 没有属性 load，只有 load(_:)。也许你想做的只是:

if let url = webViews.first?.url {
    // ..
}