Question

我的项目完全在故事板中，我在UITableViewController中嵌入了NavigationController，在每个单元格中我都有一个按钮来分享通知。

   @IBAction  func shareSheetButtonFeed(sender: AnyObject) {
        let btnPos: CGPoint = sender.convertPoint(CGPointZero, toView: self.tableView)
        let indexPath: NSIndexPath = self.tableView.indexPathForRowAtPoint(btnPos)!
        passaValor = Int(indexPath.row)
        let printtestess = (objects?[passaValor] as! PFObject)

        let textToShare: AnyObject = (printtestess.objectForKey("subject")! as! String) + " - Cheque agora em:"


        let myWebsite = NSURL(string:"http://www.mysite.com.br/")
        let img: UIImage = UIImage(named: "myLogo-1024x1024")!

        guard let url = myWebsite else {
            print("nothing found")
            return
        }
        self.navigationController?.setNavigationBarHidden(false, animated: true)
        let shareItems:Array = [img, textToShare, url]
        let activityViewController:UIActivityViewController = UIActivityViewController(activityItems: shareItems, applicationActivities: nil)
        activityViewController.excludedActivityTypes = [UIActivityTypePrint, UIActivityTypePostToWeibo, UIActivityTypeCopyToPasteboard, UIActivityTypeAddToReadingList, UIActivityTypePostToVimeo]
        self.presentViewController(activityViewController, animated: true, completion: nil)  
        }

问题是，当我点击按钮时会显示shareSheet，在我选择社交网络之后，比如Twitter或Facebook，我以前的NavigationBar消失。

我尝试使用此行在按钮内解决问题，当我再次单击按钮时，navBar重新出现：

self.navigationController?.setNavigationBarHidden(false, animated: true)

所以我试着把这一行放在ViewWillAppear里面，但它不起作用。

Obs：我使用自动布局

感谢。

Answer 1

请等待共享表关闭以显示导航栏。为此，请在UIActivityViewController上设置completionWithItemsHandler属性。

activityViewController.completionWithItemsHandler = { _ in
    self.navigationController?.setNavigationBarHidden(false, animated: true)
}

呈现activityViewController时，UINavigationBar正在隐藏

1 个答案: