// 使用
self.cameraPermissions(authorizedBlock: {
 print("打開相機(jī)")
}, deniedBlock: {
 print("沒有權(quán)限使用相機(jī)")
})

// 相機(jī)權(quán)限
class func cameraPermissions(authorizedBlock: OperationBlock?, deniedBlock: OperationBlock?) {
 let authStatus = AVCaptureDevice.authorizationStatus(for: AVMediaType.video)
 
 // .notDetermined .authorized .restricted .denied
 if authStatus == .notDetermined {
  // 第一次觸發(fā)授權(quán) alert
  AVCaptureDevice.requestAccess(for: .video, completionHandler: { (granted: Bool) in
   self.cameraPermissions(authorizedBlock: authorizedBlock, deniedBlock: deniedBlock)
  })
 } else if authStatus == .authorized {
  if authorizedBlock != nil {
   authorizedBlock!()
  }
 } else {
  if deniedBlock != nil {
   deniedBlock!()
  }
 }
}

// 使用
self.photoAlbumPermissions(authorizedBlock: {
 print("打開相冊")
}, deniedBlock: {
 print("沒有權(quán)限打開相冊")
})

// 相冊權(quán)限
class func photoAlbumPermissions(authorizedBlock: OperationBlock?, deniedBlock: OperationBlock?) {
 let authStatus = PHPhotoLibrary.authorizationStatus()
 
 // .notDetermined .authorized .restricted .denied
 if authStatus == .notDetermined {
  // 第一次觸發(fā)授權(quán) alert
  PHPhotoLibrary.requestAuthorization { (status:PHAuthorizationStatus) -> Void in
   self.photoAlbumPermissions(authorizedBlock: authorizedBlock, deniedBlock: deniedBlock)
  }
 } else if authStatus == .authorized {
  if authorizedBlock != nil {
   authorizedBlock!()
  }
 } else {
  if deniedBlock != nil {
   deniedBlock!()
  }
 }
}