Ios 相机预览黑色

我正在用相机拍照。他们给我看了一张未渲染的快照，结果是一张空快照。确保您的视图在快照之前或屏幕更新之后至少呈现一次

-(IBAction)choosePicture:(id)sender
{
    UIImagePickerController *imagePicker=[[UIImagePickerController alloc]init];
    imagePicker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
    imagePicker.delegate=self;
    [self presentViewController:imagePicker animated:YES completion:nil];


}
-(IBAction)takePicture:(id)sender
{
    UIImagePickerController *imagePicker=[[UIImagePickerController alloc]init];
    imagePicker.sourceType=UIImagePickerControllerSourceTypeCamera;
    imagePicker.delegate = self;

    [self presentViewController:imagePicker animated:YES completion:nil];
}
-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{
  //  UIImage *pickedImage=[info objectForKey:UIImagePickerControllerOriginalImage];

    image.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

    picker.modalPresentationStyle = UIModalPresentationFullScreen;


    [picker dismissViewControllerAnimated:YES completion:nil];

}

---

在一个空的应用程序中尝试了你的代码，没有消息，一切正常

除了从苹果下载的例子

它也有同样的问题，但一切正常。可能只是个虫子。（如果他们自己的代码具有相同的消息）

如果您有此消息，但有些问题无法正常工作，请尝试类似的问题。例如：

这对我很有效：

-(IBAction)takePicture:(id)sender
{
    UIImagePickerController *imagePickController=[[UIImagePickerController alloc]init];
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {
       imagePickController.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    else
    {
       imagePickController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }
    imagePickController.delegate = self;
    imagePickController.allowsEditing = TRUE;
    [self presentViewController:imagePickController animated:YES completion:nil];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
  [self dismissViewControllerAnimated:YES completion:nil];
  <your image> = [info objectForKey:UIImagePickerControllerEditedImage];
}

-（iAction）拍照：（id）发送者
{
UIImagePickerController*ImagePickerController=[[UIImagePickerController alloc]init]；
如果（[UIImagePickerController IsSourceType可用：UIImagePickerController SourceType相机]）
{
ImagePickerController.sourceType=UIImagePickerControllerSourceTypeCamera；
}
其他的
{
ImagePickerController.sourceType=UIImagePickerControllerSourceTypePhotoLibrary；
}
imagePickController.delegate=self；
imagePickController.allowsEditing=TRUE；
[self-presentViewController:imagePickController动画：是完成：无]；
}
-（void）imagePickerController:（UIImagePickerController*）picker未使用信息完成PickingMediaWithInfo:（NSDictionary*）信息
{
[自我解除视图控制器激活：是完成：无]；
=[info objectForKey:UIImagePickerControllerEditedImage]；
}