objective-c - 更改通过 UIPopOver (iPad) 呈现的 UIImagePicker 的大小

Question

我正在尝试更改通过 UIPopOver 呈现的 UIImagePicker 的大小。代码如下所示。问题是 PopOver 大小无法正确显示 - 它会以正确的大小短暂闪烁，然后以动画方式缩小到通常的默认大小。

谁能告诉我如何更改弹出窗口的大小？

- (void)showImagePickerForPhotoLibrary {
    NSLog(@"Picker");
    imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.delegate = self;
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePickerController.contentSizeForViewInPopover = CGSizeMake(768, 1000);

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        Class cls = NSClassFromString(@"UIPopoverController");
        if (cls != nil) {
            popoverController = [[UIPopoverController alloc] initWithContentViewController:imagePickerController];
            //popoverController.popoverContentSize = CGSizeMake(768, 1000);
            [popoverController presentPopoverFromRect:selectedRect inView:self.view permittedArrowDirections:4 animated:YES];
        }
    }
    else {
        [app.mainViewController presentModalViewController:imagePickerController animated:YES];
    }   
}

Answer 1

我不确定这是最优雅的解决方案，但它对我来说似乎工作正常:

您可以将 UIImagePickerController 的 View 嵌入到“容器”UIViewController 的 View 中。

- (void)showImagePickerForPhotoLibrary {
NSLog(@"Picker");
    imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.delegate = self;
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    UIViewController *containerController = [[UIViewController alloc] init];
    containerController.contentSizeForViewInPopover = CGSizeMake(768, 1000);

    [containerController.view addSubview:imagePickerController.view];

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        Class cls = NSClassFromString(@"UIPopoverController");
        if (cls != nil) {
            popoverController = [[UIPopoverController alloc] initWithContentViewController:containerController];

            [popoverController presentPopoverFromRect:selectedRect inView:self.view permittedArrowDirections:4 animated:YES];


            [imagePickerController.view setFrame:containerController.view.frame];
        }
    }
    else {
        [app.mainViewController presentModalViewController:containerController animated:YES];
    }   
}

希望对你有帮助

编辑:由于某些奇怪的原因，当横向正确时，框架确实发生了变化。

要解决这个问题，您需要在显示弹出窗口后设置图像选择器的 View 框架。

我已经编辑了上面的代码以显示这一点。

此外，在您的 Controller 中，添加以下内容:

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {

    [imagePickerController.view setFrame:imagePickerController.view.superview.frame];
}