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!//Creatingsessionletsession=AVCaptureSession()//DefinecapturedeviceletcaptureDevice=AVCaptureDevice.defaultDevice(withMediaType:AVMediaTypeVideo)do{letinput=tryAVCaptureDeviceInput(device:captureDevice)session.addIn

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!//Creatingsessionletsession=AVCaptureSession()//DefinecapturedeviceletcaptureDevice=AVCaptureDevice.defaultDevice(withMediaType:AVMediaTypeVideo)do{letinput=tryAVCaptureDeviceInput(device:captureDevice)session.addIn