触觉反馈与AVFoundation搭配不好？ （UIImpactFeedbackGenerator等） [英] Haptic feedback not playing nice with AVFoundation? (UIImpactFeedbackGenerator, etc)

问题描述

我试图在后台查看视频/摄像机，同时我也允许我的应用中的触觉反馈以执行各种操作，但是似乎AVFoundation在我所进行的任何通话中都表现不佳触觉调用：

I'm trying to have a video / camera view in the background while I also allow for haptic feedback in my app for various actions, but it seems that AVFoundation is not playing nice with any of the calls I am making that involve the haptic calls:

     if #available(iOS 10.0, *) {

        let generator = UIImpactFeedbackGenerator(style: .light)
            generator.prepare()
            generator.impactOccurred()
// More:

      let feedbackGenerator  = UISelectionFeedbackGenerator()
                feedbackGenerator.selectionChanged()

}

触觉反馈效果很好，符合预期只要将AVFoundation的内容注释掉即可。有任何想法吗？

Haptic feedback works great and as expected as long as the AVFoundation stuff is commented out. Any ideas?

使用：

    captureSession = AVCaptureSession()

AND：

previewLayer = AVCaptureVideoPreviewLayer（session：captureSession）

previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)

谢谢

推荐答案

我假设，如果您使用的是AVCaptureSession，那么您可能会有类似这样的代码：

I assume that if you are using AVCaptureSession then you probably have code like this:

do {
    let audioDevice = AVCaptureDevice.default(for: .audio)
    let audioDeviceInput = try AVCaptureDeviceInput(device: audioDevice!)

    if captureSession.canAddInput(audioDeviceInput) {
        captureSession.addInput(audioDeviceInput)
    } else {
        print("Could not add audio device input to the session")
    }
} catch {
    print("Could not create audio device input: \(error)")
}

因此音频输入无法播放与触觉引擎配合得很好。在播放触觉之前，必须从捕获会话中删除音频输入，然后将其重新添加。

So audio input is not playing well with haptic engine. You have to remove audio input from capture session before you are playing haptic and then add it back.

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