ReplayKit:永远不会输入startRecording()完成处理程序 [英] ReplayKit: startRecording() completion handler is never entered

问题描述

问题描述

即使显示了允许$ AppName中的屏幕录像"弹出窗口，也永远不会输入startRecording()完成处理程序.有时会显示允许$ AppName中的屏幕录像"弹出窗口.当我删除应用程序，重新启动设备并在项目上进行清理/构建时，也会发生这种情况.我正在使用具有iOS 11和Xcode 9的iPad Air 2.

The startRecording() completion handler is never entered, even though the "Allow screen recording in $AppName" pop-up was shown. The "Allow screen recording in $AppName" pop-up is shown occasionally. This happens also when I remove the app, restart the device and do a clean/build on the project. I'm using an iPad Air 2 with iOS 11 and Xcode 9.

研究

此问题在早期版本中似乎也是一个问题，请参见此处: replaykit startrecording有时永远不会进入完成处理程序 我不赞成通过关闭WiFi或建立稳定的互联网连接来解决此问题，在iOS 11中也未解决此问题.

This problem seemed to be an issue in earlier versions as well, see here: replaykit startrecording sometimes never enters completion handler I can't approve that turning off WiFi or having a stable internet connection solves this problem, neither has this problem being fixed in iOS 11.

这是我正在使用的代码:

Here is the code I'm using:

@IBAction func recordButtonTapped(_ sender: UIButton) {
    if !recorder.isRecording {
        startRecording(sender)
    } else {
        stopRecording(sender)
    }
}

private func startRecording(_ sender: UIButton) {
    guard recorder.isAvailable else {
        print("Recording is not available at this time.")
        // Display UI for recording being unavailable
        return
    }

    recorder.startRecording(handler: { (error) in
        guard error == nil else {
            print("There was an error starting the recording.")
            print(error!)
            return
        }

        print("Started Recording Successfully")
        DispatchQueue.main.async {
            sender.setTitle("Stop Recording", for: .normal)
            sender.setTitleColor(.red, for: .normal)
        }
    })
}

推荐答案

我想我自己找到了答案.请尝试一下并确认是否可行:

I guess I found the answer myself. Please try this out and and confirm if it works:

1. 删除您的应用
2. 清理Xcode项目
3. 按住iOS设备的电源按钮
4. 出现要关闭的幻灯片时，按住主屏幕按钮，直到屏幕闪烁黑色，然后释放所有按钮
5. 再次运行您的Xcode项目
6. 现在应该再次调用处理程序

我怀疑记录器使用的共享实例中存在一些错误，这些错误只能在清理设备RAM时重置.

My suspicion is that there is some bug in the used shared instance of the recorder which can only be reset when cleaning up the device RAM.

修改: 我还观察到，仅在录制过程中停止使用Xcode运行的应用程序时，才会发生此错误.如果我将应用程序置于后台或使用iOS任务管理器关闭该应用程序，则在再次启动该应用程序时不会出现此错误.

I also observed that this error only happens when I stop the running app with Xcode while the recording is in progress. If I put the app in the background or shut down the app with the iOS task manager, then this error does not appear when the app is started again.

结论:请勿在录制运行时使用Xcode关闭您的应用.如果您改用iOS任务管理器，它将继续正常工作并提供回调.

Conclusion: DO NOT shut down your app using Xcode, while recording is running. If you use the iOS task manager instead then it will continue working properly and deliver the callbacks.

修改2: 提交了一个错误报告，Apple回答说他们知道此问题，并致力于解决该问题.

Edit 2: A bug report is filed and Apple answered that they are aware of this problem, working on it to solve it.

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