通过UIActivityViewController分享到Twitter/Facebook等导致崩溃

Question

在iOS8上,我正在使用UIActivityViewController与Facebook/Twitter等共享UIImage.它似乎工作正常,但今天它在我的iPad上运行代码时突然崩溃了.但是,它仍然可以在模拟器中按预期工作.

我的代码:

UIActivityViewController *controller =
[[UIActivityViewController alloc]
 initWithActivityItems:@[text, url, myImage]
 applicationActivities:nil];

[self presentViewController:controller animated:YES completion:nil];

崩溃后,Xcode吐出:

发现的扩展名:{({id = com.apple.share.Facebook.post},{id = com.apple.share.Twitter.post},{id = com.apple.share.TencentWeibo.post},{id = com.apple.share.SinaWeibo.post})} for attributes:{NSExtensionActivationRule = {extensionItems =({attachments =({registeredTypeIdentifiers =("public.image");},{registeredTypeIdentifiers =("public.plain-text" );},{registeredTypeIdentifiers =("public.url");});}); }; NSExtensionPointName =("com.apple.share-services","com.apple.ui-services","com.apple.services"); 2014-08-07 21:38:59.208 collageTest [279:11021] LaunchServices:invalidationHandler被称为2014-08-07 21:38:59.212 collageTest [279:11016]发现的扩展:{({id = com.apple.share .Flickr.post},{id = com.apple.mobileslideshow.StreamShareService},{id = com.apple.share.Twitter.post},{id = com.apple.share.Facebook.post},{id = com .apple.share.Vimeo.post},{id = com.apple.share.SinaWeibo.post},{id = com.apple.share.TencentWeibo.post})} for attributes:{NSExtensionPointName ="com.apple.共享服务"; 2014-08-07 21:38:59.216 collageTest [279:11021] LaunchServices:invalidationHandler被调用

Answer 1

看一下这些文档,我需要为popover控制器定义一个源视图

UIActivityViewController *controller =
[[UIActivityViewController alloc]
 initWithActivityItems:@[text,url,myImage]
 applicationActivities:nil];

[self presentViewController:controller animated:YES completion:nil];

UIPopoverPresentationController *presentationController =
[controller popoverPresentationController];

presentationController.sourceView = self.view;

Answer 2

popoverPresentationController对iOS 8来说是新手,并且会在iOS 7上崩溃.它在iPhone上也是零,因为它只UIPopover在iPad上.这是克里斯蒂安在斯威夫特的答案,考虑到这些事实:

Swift 2.0(Xcode 7)

let controller = UIActivityViewController(activityItems: [text, url, myImage], applicationActivities: nil)

presentViewController(controller, animated: true, completion: nil)

if #available(iOS 8.0, *) {
    let presentationController = controller.popoverPresentationController
    presentationController?.sourceView = view
}

Swift 1.2(Xcode 6)

let controller = UIActivityViewController(activityItems: [text, url, myImage], applicationActivities: nil)

presentViewController(controller, animated: true, completion: nil)

if controller.respondsToSelector("popoverPresentationController") {
    // iOS 8+
    let presentationController = controller.popoverPresentationController
    presentationController?.sourceView = view
}