swift - 我如何从 SafariExtensionHandler 向页面上的注入脚本发送消息

Question

override func messageReceived我可以在使用from page道具和方法收到消息时发送消息dispatchMessageToScript，但我不明白如何在injectOpenWelcomeTab方法中做到这一点。谢谢

import SafariServices

class SafariExtensionHandler: SFSafariExtensionHandler {

    override func messageReceived(withName messageName: String, from page: SFSafariPage, userInfo: [String : Any]?) {
        // This method will be called when a content script provided by your extension calls safari.extension.dispatchMessage("message").
        page.getPropertiesWithCompletionHandler { properties in
            NSLog("The extension received a message (\(messageName)) from a script injected into (\(String(describing: properties?.url))) with userInfo (\(userInfo ?? [:]))")

            //Вот таким образом можем дёргать методы из контроллера
            SafariExtensionViewController.shared.popupChangeBackgorundColor()           
        }

        page.dispatchMessageToScript(withName: "openWelcomePage")
    }

    public func injectOpenWelcomeTab(){           
        //Here I want send message to injected script        
    }     
}

Answer 1

SFSafariApplication.getActiveWindow 是你最好的朋友。只要确保你import SafariServices

func injectOpenWelcomeTab() {
    getActivePage {
        $0?.dispatchMessageToScript(withName: "openWelcomePage", userInfo: ["foo": bar as Any])
    }
}

func getActivePage(completionHandler: @escaping (SFSafariPage?) -> Void) {
    SFSafariApplication.getActiveWindow {$0?.getActiveTab {$0?.getActivePage(completionHandler: completionHandler)}}
}