swift - 在 macOS Mojave 中请求相机权限

Question

如果用户未授予权限，则在 macOS Mojave 中为相机初始化 AVCaptureDeviceInput 会失败。 尝试初始化时，系统会自动显示权限请求对话框。似乎没有办法获得用户响应的通知。

• + (instancetype)deviceInputWithDevice:(AVCaptureDevice *)device 错误:(NSError * _Nullable *)outError; https://developer.apple.com/documentation/avfoundation/avcapturedeviceinput/1450880-deviceinputwithdevice

我正在寻找一种模拟方式来获得通知，就像请求音频权限一样:

• func requestRecordPermission(_ response: @escaping PermissionBlock) https://developer.apple.com/documentation/avfoundation/avaudiosession/1616601-requestrecordpermission

Protecting the User's Privacy指南未概述任何其他相机访问方法。

Answer 1

查看authorizationStatus(for:)发现解决方案其实是模拟iOS的在从 AVCaptureDevice 初始化一个 AVCaptureDeviceInput 之前。

并使用 requestAccess(for:completionHandler:)如果需要，请求许可。

获取相机访问权限的示例:

let status = AVCaptureDevice.authorizationStatus(for: .video)

if status == .authorized {
  // connect to video device
  let devices = AVCaptureDevice.devices(for: .video)
  ...
  return
}

if status == .denied {
  // show error
  return
}

AVCaptureDevice.requestAccess(for: .video) { (accessGranted) in
  // handle result
}