如何在 iOS8 中以编程方式知道该应用程序是否可以访问相机 [英] How to know that application have camera access or not programmatically in iOS8

问题描述

我的应用程序使用相机.在 iOS8 中，它们包含一个新的隐私设置 Camera，用户可以在其中管理为每个应用程序使用相机权限.

My application uses the camera. In iOS8 they include a new privacy setting, Camera, where the user can manage use of camera rights for each application.

问题:
如果用户不允许我的应用程序使用相机，那么我怎么知道我的应用程序无法访问相机.
就像我可以使用 ALAssetsLibrary authorizationStatus 来发现照片库的状态或 ABAddressBookGetAuthorizationStatus 以了解 电话簿 访问的状态.

Problem:
If the user didn't allow my application to use camera then how can i know that My application have no access for camera.
like i can use ALAssetsLibrary authorizationStatus to discover the status of the photolibrary or ABAddressBookGetAuthorizationStatus to know status of phonebook access.

问题:
我如何知道我的应用程序在 iOS8 中是否可以访问相机，以便我可以提示用户允许我的应用程序访问相机?

Question:
How i can know whether my application has camera access or not in iOS8, so that I may prompt the user to allow camera access for my application?

我有下面的照相亭打印屏幕有同样的问题就像我的应用程序一样.

I have below print screen of Photo booth which having same problem as my application have.

<小时>当没有摄像头访问时，它只会显示黑屏没有任何消息.

推荐答案

检查AVAuthorizationStatus 用于相机可用性，然后相应地处理案例

Check AVAuthorizationStatus for camera availability and then handle cases accordingly

AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
if(status == AVAuthorizationStatusAuthorized) {
  // authorized
} else if(status == AVAuthorizationStatusDenied){
  // denied
} else if(status == AVAuthorizationStatusRestricted){
  // restricted
} else if(status == AVAuthorizationStatusNotDetermined){
  // not determined
  [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
    if(granted){
  NSLog(@"Granted access");
} else {
  NSLog(@"Not granted access");
}
  }];
}

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