ios - 自定义相机覆盖在 iPad 上不起作用

Question

我正在尝试使自定义叠加层正常工作。我的项目中有一个 PNG 图像。边缘有边框，而中心是透明的。在我的代码中，我有：

 self.imagePickerController = [[UIImagePickerController alloc] init];
    [self.imagePickerController setSourceType:UIImagePickerControllerSourceTypeCamera];
    [self.imagePickerController setDelegate:self];
    [self.imagePickerController setCameraDevice:UIImagePickerControllerCameraDeviceRear];
    [self.imagePickerController setShowsCameraControls:NO];

    UIView *myOverlay = [[UIView alloc] initWithFrame:self.view.bounds];
    UIImage *overlayImg = [UIImage imageNamed:@"overlay.png"];
    UIImageView *overlayBg = [[UIImageView alloc] initWithImage:overlayImg];
    [myOverlay addSubview:overlayBg];
    [self.navigationController presentViewController:self.imagePickerController animated:YES completion:nil];

当我按下按钮来展示控制器时，我得到了这个：

我做错了什么让相机无法占据整个屏幕，也没有添加overlay.png图像？这就是叠加层的样子，只要记住白色部分实际上是透明的：

更新

我已经更新了代码：

self.imagePickerController = [[UIImagePickerController alloc] init];
    [self.imagePickerController setSourceType:UIImagePickerControllerSourceTypeCamera];
    [self.imagePickerController setDelegate:self];
    [self.imagePickerController setCameraDevice:UIImagePickerControllerCameraDeviceRear];
    [self.imagePickerController setShowsCameraControls:NO];

    UIView *myOverlay = [[UIView alloc] initWithFrame:self.view.bounds];
    UIImage *overlayImg = [UIImage imageNamed:@"overlay.png"];
    UIImageView *overlayBg = [[UIImageView alloc] initWithImage:overlayImg];
    [myOverlay addSubview:overlayBg];
    [self.imagePickerController.view addSubview:myOverlay];

    [self.navigationController presentViewController:self.imagePickerController animated:YES completion:nil];

现在看起来像这样，越来越好，但相机仍然只占屏幕的一小部分，而且框架尺寸不太合适。

Answer 1

您需要在myOverlay和之间建立连接imagePickerController，因此尝试添加myOverlay为 的子视图imagePickerController.view。