swift - 类型 'AVCaptureDevice' 没有成员 'defaultDevice'

Question

正在研究二维码阅读器。我是编程新手，所以这可能很容易解决。错误是“类型‘AVCaptureDevice’没有成员‘defaultDevice’”提前感谢您的帮助!

 //Creating session
    let session = AVCaptureSession()
    //Define capture device
    let captureDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)

    do
    {
        let input = try AVCaptureDeviceInput(device: captureDevice)
        session.addInput(input)
    }

Answer 1

您正在使用旧的 Swift 2 API。线路:

let captureDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)

应该是:

let captureDevice = AVCaptureDevice.default(for: .video)