iphone - 使用 UIActivityViewController 附加本地视频

Question

我正在编写一个具有本地保存的视频 (.mov) 的 iOS 应用程序。我正在尝试通过 UIActivityViewController 附加视频。它非常适合电子邮件。视频已成功附加并发送。它也适用于保存到相机胶卷。
附加到消息时不起作用。仅显示文本。 Twitter 和 Facebook 甚至都没有出现。当我删除视频附件时，Twitter 和 Facebook 终于开始显示了。我不太关心消息，但谁能告诉我为什么 Facebook 和 Twitter 没有出现？

这是我的代码:

- (IBAction) shareVideo {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *URL = [documentsDirectory stringByAppendingPathComponent:demoName];

    NSString* someText = demoName;
    NSURL *urlToShare = [NSURL fileURLWithPath:URL isDirectory:NO];
    NSArray* dataToShare = @[someText, urlToShare];

    UIActivityViewController* activityViewController =
    [[UIActivityViewController alloc] initWithActivityItems:dataToShare
                                      applicationActivities:nil];
    activityViewController.excludedActivityTypes = @[UIActivityTypePrint,UIActivityTypeCopyToPasteboard,UIActivityTypeAssignToContact];

    activityViewController.completionHandler = ^(NSString *activityType, BOOL completed) {
        //if (completed) {
        [self dismissViewControllerAnimated:YES completion:nil];
        //}
    };

    [self presentViewController:activityViewController animated:YES completion:nil];
}

Answer 1

其他答案已过时。这有效:

    @IBAction func didTapShare(sender: AnyObject) {
    let videoURL = NSURL(fileURLWithPath:localVideoPath)
    let activityItems = [videoURL, "Check this out!" ]
    let activityController = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)

    activityController.popoverPresentationController?.sourceView = self.view
    activityController.popoverPresentationController?.sourceRect = self.view.frame

    self.presentViewController(activityController, animated: true, completion: nil)
}