UIImagePickerController 请求访问照片

Question

即使我没有将照片保存在任何地方，但每当我在 didFinishPickingMediaWithInfo 函数中访问编辑后的图像时，iOS 都会要求我获得访问设备上照片的权限。

知道如何防止它请求许可。

添加 UIImagePickerController

- (IBAction)addPhotoButtonPressed:(id)sender {

    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;

    picker.showsCameraControls = YES;

    [self presentViewController:picker animated:YES completion:NULL];


}

didFinishPickingMediaWithInfo

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {


    [picker dismissViewControllerAnimated:YES completion:nil];

    UIImage *image;

   image = [info objectForKey:@"UIImagePickerControllerEditedImage"];


    if (image == nil)
        image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];


    NSData *imageData = UIImageJPEGRepresentation(image, 0.05f);
    _locationImage.image = [UIImage imageWithData:imageData];
    imageFile = [PFFile fileWithName:@"Image.jpg" data:imageData];

    }

Answer 1

我认为编写自己的编辑控件（虽然这并不难）没有任何害羞，然后你就可以完全控制了。

UIImagePicker 是这样问的——我猜——因为它会临时保存原始图像，就好像它确实被保存了一样......

Answer 2

您必须知道，第一次访问照片库时，必须向用户请求许可。

http://www.macrumors.com/2012/06/14/apple-requires-user-permission-before-apps-can-access-personal-data-in-ios-6/

你必须检查权限

AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
if(authStatus == AVAuthorizationStatusAuthorized) {
  // do your logic
} else if(authStatus == AVAuthorizationStatusDenied){
  // denied
} else if(authStatus == AVAuthorizationStatusRestricted){
  // restricted, normally won't happen
} else if(authStatus == AVAuthorizationStatusNotDetermined){
  // not determined?!
  [AVCaptureDevice requestAccessForMediaType:mediaType completionHandler:^(BOOL granted) {
    if(granted){
      NSLog(@"Granted access to %@", mediaType);
    } else {
      NSLog(@"Not granted access to %@", mediaType);
    }
  }];
} else {
  // impossible, unknown authorization status
}