如果给出photolibrary许可，并且未给出相机许可，则相机打开并拍摄空白照片

Question

我已经拒绝了相机的许可，但是之前得到了相机的许可。但相机以黑屏打开。我可以看到拍照的选项。有没有办法打开相机。

我的代码是这样的

-(void)showImagePickerWithSoureType:(UIImagePickerControllerSourceType)type 
{ 
    if([UIImagePickerController isSourceTypeAvailable:type]) 
    { 
     pickerObj = [UIImagePickerController new]; 
     pickerObj.sourceType = type; 
     UIViewController *topMostViewController = [CommonFunctions getTopMostViewControllerFromRootViewController:[CommonFunctions getAppDelegateObject].window.rootViewController]; 
     dispatch_async(dispatch_get_main_queue(), ^{ 
      [topMostViewController presentViewController:pickerObj animated:YES completion:NULL]; 
      pickerObj.delegate = self; 
      pickerObj.editing = true; 
      pickerObj.allowsEditing = true; 
     }); 


     if([PHPhotoLibrary authorizationStatus] == PHAuthorizationStatusNotDetermined) 
     { 
      [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) { 
       switch (status) { 
        case PHAuthorizationStatusAuthorized: 
         break; 
        case PHAuthorizationStatusRestricted: 
         [self imagePickerControllerDidCancel:pickerObj]; 
         break; 
        case PHAuthorizationStatusDenied: 
         [self imagePickerControllerDidCancel:pickerObj]; 
         break; 
        default: 
         break; 
       } 
      }]; 
     } 
    } 
} 

Answer 1

尝试这样的：

对于相机：

AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; 
    if(authStatus == AVAuthorizationStatusAuthorized) 
    { 
     [self accessCamera]; 
    } 
    else if(authStatus == AVAuthorizationStatusNotDetermined) 
    { 

     [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) 
     { 
      if(granted) 
      { 
       [self accessCamera]; 
      } 
      else 
      { 
       [self deniedCamera]; 
      } 
     }]; 
    } 
else 
{ 
      [self deniedCamera]; 
} 

对于PhotoLibrary：

PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus]; 

if (status == PHAuthorizationStatusAuthorized) { 
    [self accessPhotoLibrary]; 
} 
else if (status == PHAuthorizationStatusNotDetermined) { 

    [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) { 

     if (status == PHAuthorizationStatusAuthorized) { 
      [self accessPhotoLibrary]; 
     }else { 
      [self deniedPhotoLibrbary]; 
     } 
    }]; 
} 
else { 
    [self deniedPhotoLibrbary]; 
} 

而且方法调用pickerView代表

-(void)accessCamera{   


    UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
    picker.delegate = self; 
    picker.allowsEditing = YES; 
    picker.sourceType = UIImagePickerControllerSourceTypeCamera; 
     dispatch_async(dispatch_get_main_queue(), ^{ 
      [self presentViewController:picker animated:YES completion:NULL]; 
     }); 
} 


-(void)accessPhotoLibrary{ 
     UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
     picker.allowsEditing = YES; 
     picker.delegate = self; 
     picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
     dispatch_async(dispatch_get_main_queue(), ^{ 
      [self presentViewController:picker animated:YES completion:NULL]; 
     }); 

} 

然后你可以从didFinishPickingMediaWithInfo方法来获取图像。