Objective c 通过UIPopOver（iPad）更改UIImagePicker的大小

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的大小显示不正确-它会以正确的大小短暂闪烁，然后以通常的默认大小设置动画

有人能告诉我怎样才能改变府绸的尺寸吗

- (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];
    }   
}

---

我不确定这是否是最优雅的解决方案，但它似乎对我来说效果很好：

您可以将UIImagePickerController的视图嵌入到“容器”UIViewController的视图中

- (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];
    }   
}

希望这有帮助

编辑：由于一些奇怪的原因，当处于横向时，帧确实会发生变化

为了解决这个问题，您需要在呈现popover之后设置图像选择器视图的帧

我已经编辑了上面的代码来显示这一点

此外，在控制器中，添加以下内容：

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {

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

---

当我尝试Mutix的解决方案时，popover只显示了导航栏和一个空白的白色视图

我的解决方法是将imagePickerController添加为containerController的子级，而不仅仅是添加picker的视图

- (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];
    }   
}

主要是指更换这条线路：

[containerController.view addSubview:imagePickerController.view];

以下几行：

[containerController addChildViewController:imagePickerController];
[containerController.view addSubview:imagePickerController.view];
[imagePickerController didMoveToParentViewController:containerController];

---

此外，在使用这种方法时，我不需要对横向模式进行任何特殊处理。

谢谢。我是否可以得到line Container Controller的iPad的宽度和高度。contentSizeForViewInPopover=CGSizeMake（768，1000）？ipad的分辨率为768x1024。如果您希望popover占据整个屏幕，请尝试CGSizeMake（self.view.frame.size.width，self.view.frame.size.height）这种功能，但会导致另一个（奇怪的）错误：