Question

当我为前置摄像头设置flashmode然后调用

时

让videoConnection = stillImageOutput！.connectionWithMediaType（AVMediaTypeVideo） stillImageOutput？.captureStillImageAsynchronouslyFromConnection（videoConnection，completionHandler：process）我收到以下错误消息：

捕获静止图像时出现

错误：错误Domain = AVFoundationErrorDomain Code = -11800“操作无法完成”UserInfo = {NSUnderlyingError = 0x12eeb7200 {Error Domain = NSOSStatusErrorDomain Code = -16800“（null）”}，NSLocalizedFailureReason = An发生未知错误（-16800），NSLocalizedDescription =操作无法完成}

如果我没有设置相机的flashMode然后调用：

let videoConnection = stillImageOutput!.connectionWithMediaType(AVMediaTypeVideo)
    stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: process)

前置摄像头拍摄照片并不会丢失错误。所以我想知道，iphone是否存在前置摄像头闪光灯。它应该考虑到Snapchat有一个。 iPhone上的默认相机应用程序有一个前置摄像头闪光灯。所以我不完全确定发生了什么。目前，这就是我设置相机的方式：

func getCameraStreamLayer() -> CALayer? {

captureSession = AVCaptureSession()
captureSession!.sessionPreset = AVCaptureSessionPresetPhoto
currentCamera = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
stillImageOutput = AVCaptureStillImageOutput()
stillImageOutput!.outputSettings = [ AVVideoCodecKey: AVVideoCodecJPEG ]

if let input = try? AVCaptureDeviceInput(device: currentCamera) as AVCaptureDeviceInput{
    if captureSession!.canAddInput(input) && captureSession!.canAddOutput(stillImageOutput) {
        captureSession!.addInput(input)
        captureSession!.addOutput(stillImageOutput)
    }
}

return AVCaptureVideoPreviewLayer(session: captureSession)

}

func toggleFlash() {
    flash = !flash
    if flash {
        for case let (device as AVCaptureDevice) in AVCaptureDevice.devices()  {
            if device.hasFlash && device.flashAvailable {
                if device.isFlashModeSupported(.On) {
                    do {
                        try device.lockForConfiguration()
                        device.flashMode = .On
                        device.unlockForConfiguration()


                    } catch {
                        print("Something went wrong")
                    }
                }
            }
        }
    }else {//turn off flash
    }
}


func photograph(process: (CMSampleBuffer!,NSError!)->()) {
    let videoConnection = stillImageOutput!.connectionWithMediaType(AVMediaTypeVideo)
    stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: process)

}
    func flipCamera() {
    guard let session = captureSession where session.running == true else {
        return
    }

    session.beginConfiguration()
    let currentCameraInput = session.inputs[0] as! AVCaptureDeviceInput
    session.removeInput(currentCameraInput)


    let newCamera = {
        let devices = AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo)
        for case let device as AVCaptureDevice in devices {
            if(device.position == .Front && currentCameraInput.device.position == .Back){
                return device
            }
            if(device.position == .Back && currentCameraInput.device.position == .Front){
                return device
            }
        }
        return nil
    }() as AVCaptureDevice?
    currentCamera = newCamera!
    if let newVideoInput = try? AVCaptureDeviceInput(device: newCamera) {
        captureSession?.addInput(newVideoInput)
    }

    captureSession?.commitConfiguration()
}

我不知道该怎么做。我试图创建一个新的捕获会话，然后锁定然后为相机设置flashMode。我仍然得到同样的错误。

Answer 1

iPhone 6没有面向前置的闪光灯相机，但iPhone 6s及更高版本。

有＆＃34; hack＆＃34;应用程序商店中的解决方案可以将屏幕快速闪烁以在前置模式下生成光线，但是没有实际的闪光灯。

iphone6是否有前置摄像头闪光灯

1 个答案: