小编Rob*_*uez的帖子

我正在寻找如何打开/关闭iPhone的相机闪光灯,我发现了这个:

@IBAction func didTouchFlashButton(sender: AnyObject) {
    let avDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)

// check if the device has torch
if avDevice.hasTorch {
    // lock your device for configuration
    avDevice.lockForConfiguration(nil)
    // check if your torchMode is on or off. If on turns it off otherwise turns it on
    if avDevice.torchActive {
        avDevice.torchMode = AVCaptureTorchMode.Off
    } else {
        // sets the torch intensity to 100%
        avDevice.setTorchModeOnWithLevel(1.0, error: nil)
    }
    // unlock your device
    avDevice.unlockForConfiguration()
    }
}

我确实得到了2个问题,一个在线:

avDevice.lockForConfiguration(nil)

和另一个在线:

avDevice.setTorchModeOnWithLevel(1.0, error:nil)

它们都与异常处理有关,但我不知道如何解决它们.