Question

这是关于StackOverflow的第一个问题，所以请耐心等待我......

问题在于：
我已经创建了一个用于添加书签的自定义活动，该活动是从UIActivityViewController打开的。在iPhone上，它作为模态打开，这没关系。但是在iPad上我打开了Popover中的UIActivity，我也想在这个Popover中打开自定义BookmarkActivity。
方法

我的-(UIViewController *)activityViewController子类中的

UIActivity如下所示：

- (UIViewController *)activityViewController {

    if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
        GlobalBookmarksAddViewController *bookmarkViewController = [self.parentController.storyboard instantiateViewControllerWithIdentifier:@"GlobalBookmarksAddViewController"];

        bookmarkViewController.openedDocument = self.openedDocument;
        bookmarkViewController.yAxis = self.yAxis;
        bookmarkViewController.parentActivity = self;

        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:bookmarkViewController];

        nav.modalInPopover = YES;
        //nav.modalPresentationStyle = UIModalPresentationFormSheet;
        nav.modalPresentationStyle = UIModalPresentationCurrentContext;

        return nav;
    } else {
        GlobalBookmarksAddViewController *bookmarkViewController = [self.parentController.storyboard instantiateViewControllerWithIdentifier:@"GlobalBookmarksAddViewController"];

        bookmarkViewController.openedDocument = self.openedDocument;
        bookmarkViewController.yAxis = self.yAxis;
        bookmarkViewController.parentActivity = self;

        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:bookmarkViewController];

        return nav;
    }
}

使用此代码，书签控制器在弹出框中显示约0.2秒，然后弹出消失。如果我将属性nav.modalPresentationStyle从 UIModalPresentationCurrentContext 更改为 UIModalPresentationFormSheet ，则会正确显示bookmarkController，但是会以正常的弹出窗口显示。

我已经做了一些研究，我找到了两个链接：
UIActivity activityViewController being presented modally on iPad instead of in popover
-[UIActivity activityViewController] is not presented in a UIPopoverController

他们俩都建议，目前不可能，但不知何故，它必须是可行的 - 它适用于Safari（也是＃34;添加书签＆＃34;功能）。

所以问题是：

如何更改要在popover中正确打开的自定义视图控制器的此行为？
如果目前唯一的可能性是将其作为普通弹出窗口打开，有没有办法调整它？我曾尝试更改导航控制器和书签控制器的大小和框架，但它不起作用。

编辑：我已就此问与Apple联系，以下是解决方案：
方法-(UIViewContreoller *)activityController现在看起来像这样：

-(UIViewController *)activityViewController
{
    if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
    {
        return nil;
    }
    else
    {
        GlobalBookmarksAddViewController *bookmarkViewController = [self.parentController.storyboard instantiateViewControllerWithIdentifier:@"GlobalBookmarksAddViewController"];

        bookmarkViewController.openedDocument = self.openedDocument;
        bookmarkViewController.yAxis = self.yAxis;

        bookmarkViewController.parentActivity = self;

        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:bookmarkViewController];

        return nav;
    }
}

并且popover中的视图代码已移至-(void)performActivity方法：

-(void)performActivity
{
     if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
    {
        GlobalBookmarksAddViewController *bookmarkViewController = [self.parentController.storyboard instantiateViewControllerWithIdentifier:@"GlobalBookmarksAddViewController"];

        bookmarkViewController.openedDocument = self.openedDocument;
        bookmarkViewController.yAxis = self.yAxis;

        bookmarkViewController.parentActivity = self;

        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:bookmarkViewController];

        nav.modalInPopover = YES;
        nav.modalPresentationStyle = UIModalPresentationCurrentContext;

        // self.activityController is my own property set for the activity after the UIActivityViewController is created
        [self.activityController presentViewController:nav animated:YES completion:NULL];
    }
}

iOS 7自定义UIActivity为popover

0 个答案: