objective-c – Facebook,Twitter图标在iOS7上未显示在UIActivityViewController中

我已经添加了用于显示UIActivityViewController的代码：

-(IBAction)activityAction:(id)sender
{
    UIActivityViewController *activityViewController = [[UIActivityViewController alloc]initWithActivityItems:[NSArray arrayWithObjects:@"Hello Welcome!",[UIImage imageNamed:@"scene3.jpg"],nil] applicationActivities:nil];

     activityViewController.excludedActivityTypes = @[UIActivityTypePostToFacebook,UIActivityTypePostToTwitter,UIActivityTypePostToWeibo,UIActivityTypeAssignToContact];
    [self presentViewController:activityViewController animated:YES completion:nil];
}

iOS7中没有显示Facebook,Twitter和微博图标.在iOS6中,所有图标都正确显示.请参阅下面的截图：

我该如何解决？

objective-c – Facebook,Twitter图标在iOS7上未显示在UIActivityViewController中

解决方法

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