我终于(忽略了我从未见过工作的示例代码"收到应用程序任务,启动URL会话")设法让我的WatchOS3代码启动后台URL会话任务,如下所示:
func handle(_ backgroundTasks: Set<WKRefreshBackgroundTask>) {
for task in backgroundTasks {
if let refreshTask = task as? WKApplicationRefreshBackgroundTask {
// this task is completed below, our app will then suspend while the download session runs
print("application task received, start URL session")
let request = self.getRequestForRefresh()
let backgroundConfig = URLSessionConfiguration.background(withIdentifier: NSUUID().uuidString)
backgroundConfig.sessionSendsLaunchEvents = true
backgroundConfig.httpAdditionalHeaders = ["Accept":"application/json"]
let urlSession = URLSession(configuration: backgroundConfig, delegate: self, delegateQueue: nil)
let downloadTask = urlSession.downloadTask(with: request)
print("Dispatching data task at \(self.getTimestamp())")
downloadTask.resume()
self.scheduleNextBackgroundRefresh(refreshDate: self.getNextPreferredRefreshDate())
refreshTask.setTaskCompleted()
}
else if let urlTask = task as? WKURLSessionRefreshBackgroundTask {
//awakened because background url task has completed
let backgroundConfigObject = URLSessionConfiguration.background(withIdentifier: urlTask.sessionIdentifier)
self.backgroundUrlSession = URLSession(configuration: backgroundConfigObject, delegate: self, delegateQueue: nil) //set to nil in task:didCompleteWithError: delegate method
print("Rejoining session ", self.backgroundUrlSession as Any)
self.pendingBackgroundURLTask = urlTask //Saved for .setTaskComplete() in downloadTask:didFinishDownloadingTo location: (or if error non nil in task:didCompleteWithError:)
} else {
//else different task, not handling but must Complete all tasks (snapshot tasks hit this logic)
task.setTaskCompleted()
}
}
}
但是,我现在看到的问题是我的委托方法
urlSession:task:didReceiveChallenge:
永远不会被点击,因此我无法完成下载。 (我还添加了会话级别urlSession:didReceiveChallenge:委托方法,它也没有被点击)。
相反,我立即点击我的task:didCompleteWithError:
委托方法,该方法有错误:
&#34;此服务器的证书无效。您可能正在连接到假冒的服务器......这会使您的机密信息面临风险。&#34;
是否有人获得了后台监视更新,以便在后台网址会话期间使用didReceiveChallenge
方法的额外要求?
您可以提供的任何帮助或建议表示赞赏。
答案 0 :(得分:2)
事实证明,服务器证书错误实际上是由于我们测试环境中的罕见情况。在后端人员为我们解决了这个问题之后,这个代码在我们的生产和测试环境中都运行良好。
我从来没有点过....
<link href="https://fonts.googleapis.com/css?family=Lato"
<div class="rs">
This is text This is text This is text T
</div>
,但事实证明我不需要。
做了一个小小的无关联的改变:
如果没有打印/断点,我有时会在urlSession:task:didReceiveChallenge:
之前点击task:didCompleteWithError Error:
。
所以我改为在downloadTask:didFinishDownloadingTo location:
中设置self.pendingBackgroundURLTask。我只在downloadTask:didFinishDownloadingTo location:
中设置完成,如果错误!= nil。
task:didCompleteWithError Error:
希望别人觉得这很有帮助。