我遇到过大多数人在 iPad 上尝试呈现 UIActivityViewController
时遇到的情况;它崩溃了:
Terminating app due to uncaught exception 'NSGenericException', reason: 'UIPopoverPresentationController (<_UIAlertControllerActionSheetRegularPresentationController: 0x7fc4f2d87d00>) should have a non-nil sourceView or barButtonItem set before the presentation occurs.
这是我的代码:
- (void)shareLeaflet
{
NSString *forwardedString = [[NSString alloc] initWithFormat:@"Check out this leaflet\n\n %@ \n\nself.theURLToShare];
UIActivityViewController *activityViewController = nil;
if (IDIOM == IPAD)
{
NSLog(@"iPad");
activityViewController.popoverPresentationController.sourceView = self.view;
// activityViewController.popoverPresentationController.sourceRect = self.frame;
[self presentViewController:activityViewController
animated:YES
completion:nil];
}
else
{
NSLog(@"iPhone");
activityViewController = [[UIActivityViewController alloc] initWithActivityItems:[NSArray arrayWithObjects:forwardedString, nil] applicationActivities:nil];
[self presentViewController:activityViewController animated:YES completion:nil];
}
在我的 viewDidLoad
中,我有:
UIBarButtonItem *composeButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(shareLeaflet)];
self.navigationItem.rightBarButtonItem = composeButton;
}
此 View 是一个 UIPageViewController
,它展示了一些图像,当用户点击共享按钮时,我希望弹出 iOS 8 样式的共享表。这正是 iPhone 上发生的情况,但在 iPad 上,它继续崩溃。这让我想到了 Stack Overflow,但没有一个问题( crash on showing UIPopOverPresentationController 、 iOS Crash: Terminating app due to uncaught exception reason: UIPopoverPresentationController should have a non-nil sourceView 、 UIWebViewTerminating app due to UIPopoverPresentationController 、 ios8 iPad uiwebview crashes while displaying popover when user taps drop down list HTML select tag 等)对我有用。
我已经尝试了其中的所有解决方案,并且完全明白了它的要求。
这就是我要实现的目标:
最佳答案
您没有在 iPad 上初始化 activityViewController,因此它将始终为 nil。
尝试:
- (void)shareLeaflet
{
NSString *forwardedString = [[NSString alloc] initWithFormat:@"Check out this leaflet\n\n %@ \n\nself.theURLToShare];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:[NSArray arrayWithObjects:forwardedString, nil] applicationActivities:nil];
if (IDIOM == IPAD)
{
NSLog(@"iPad");
activityViewController.popoverPresentationController.sourceView = self.view;
// activityViewController.popoverPresentationController.sourceRect = self.frame;
[self presentViewController:activityViewController
animated:YES
completion:nil];
}
else
{
NSLog(@"iPhone");
[self presentViewController:activityViewController
animated:YES
completion:nil];
}
然后像图像中那样显示它:(_shareBarButton 是您希望弹出窗口从中显示的 UIBarButtonItem)
- (void)shareLeaflet
{
NSString *forwardedString = [[NSString alloc] initWithFormat:@"Check out this leaflet\n\n %@ \n\nself.theURLToShare];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:[NSArray arrayWithObjects:forwardedString, nil] applicationActivities:nil];
if (IDIOM == IPAD)
{
NSLog(@"iPad");
activityViewController.popoverPresentationController.sourceView = self.view;
// activityViewController.popoverPresentationController.sourceRect = self.frame;
_popover = [[UIPopoverController alloc] initWithContentViewController:activityViewController];
_popover.delegate = self;
[_popover presentPopoverFromBarButtonItem:_shareBarButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
else
{
NSLog(@"iPhone");
[self presentViewController:activityViewController
animated:YES
completion:nil];
}
关于ios - UIActivityViewController 在使用 sourceView 或 barButtonItem 的 iPad 上崩溃,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33942902/