如何与UIActivityViewController共享图像

Question

我有一个按钮来分享屏幕截图给Facebook等等。

共享按钮:

ShareButton = UIButton.init(frame: CGRectMake(self.view!.frame.size.width/2 - 80,self.view!.frame.size.height/2 + 140 , 163, 54))
            
            ShareButton.setImage(UIImage(named: "Share-Button.png"), forState: UIControlState.Normal)
            
            ShareButton.addTarget(self, action: "shareButtonClicked:", forControlEvents: .TouchUpInside)
            
            self.view!.addSubview(ShareButton)

ShareButton func :

    func shareButtonClicked(sender: UIButton!) {
            
            UIGraphicsBeginImageContextWithOptions(view!.frame.size, false, 0.0)
            view!.drawViewHierarchyInRect(view!.frame, afterScreenUpdates: true)
            let image = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext();
            
            UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
            
            let activityVC = UIActivityViewController(activityItems: [image], applicationActivities: nil)
            
            let vc = self.view?.window?.rootViewController
            
            //New Excluded Activities Code
            if #available(iOS 9.0, *) {
                activityVC.excludedActivityTypes = [UIActivityTypeAirDrop, UIActivityTypeAddToReadingList, UIActivityTypeAssignToContact, UIActivityTypeCopyToPasteboard, UIActivityTypeMail, UIActivityTypeMessage, UIActivityTypeOpenInIBooks, UIActivityTypePostToTencentWeibo, UIActivityTypePostToVimeo, UIActivityTypePostToWeibo, UIActivityTypePrint]
            } else {
                // Fallback on earlier versions
                activityVC.excludedActivityTypes = [UIActivityTypeAirDrop, UIActivityTypeAddToReadingList, UIActivityTypeAssignToContact, UIActivityTypeCopyToPasteboard, UIActivityTypeMail, UIActivityTypeMessage, UIActivityTypePostToTencentWeibo, UIActivityTypePostToVimeo, UIActivityTypePostToWeibo, UIActivityTypePrint ]
            }
            
 activityVC.popoverPresentationController?.sourceView = vc?.view
 activityVC.popoverPresentationController?.sourceRect = ShareButton.frame
 vc?.presentViewController(activityVC, animated: true, completion: nil)
            
        }

当我按下按钮时，我会在控制台中看到以下内容：

“其视图不在窗口层次结构中！”

什么都没发生。

什么在起作用：

• 保存在画廊里的截图

不起作用的：

• 显示UIActivityViewContrller，让用户选择共享的位置

Answer 1

几天后，我自己解决了这个问题。

正确答案:

共享按钮:

ShareButton = UIButton.init(frame: CGRectMake(self.view!.frame.size.width/2 - 80,self.view!.frame.size.height/2 + 140 , 163, 54))

                ShareButton.setImage(UIImage(named: "Share-Button.png"), forState: UIControlState.Normal)

                ShareButton.addTarget(self, action: "pressedShareButton:", forControlEvents: .TouchUpInside)

    self.view!.addSubview(ShareButton)

ShareButton func :

    func pressedShareButton(sender: UIButton!) {

            UIGraphicsBeginImageContextWithOptions(view!.frame.size, false, 0.0)
            view!.drawViewHierarchyInRect(view!.frame, afterScreenUpdates: true)
            let image = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext();

            UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)

            let activityVC = UIActivityViewController(activityItems: [image], applicationActivities: nil)

            //New Excluded Activities Code
            if #available(iOS 9.0, *) {
                activityVC.excludedActivityTypes = [UIActivityTypeAirDrop, UIActivityTypeAddToReadingList, UIActivityTypeAssignToContact, UIActivityTypeCopyToPasteboard, UIActivityTypeMail, UIActivityTypeMessage, UIActivityTypeOpenInIBooks, UIActivityTypePostToTencentWeibo, UIActivityTypePostToVimeo, UIActivityTypePostToWeibo, UIActivityTypePrint]
            } else {
                // Fallback on earlier versions
                activityVC.excludedActivityTypes = [UIActivityTypeAirDrop, UIActivityTypeAddToReadingList, UIActivityTypeAssignToContact, UIActivityTypeCopyToPasteboard, UIActivityTypeMail, UIActivityTypeMessage, UIActivityTypePostToTencentWeibo, UIActivityTypePostToVimeo, UIActivityTypePostToWeibo, UIActivityTypePrint ]
            }

            activityVC.popoverPresentationController?.sourceView = view
            activityVC.popoverPresentationController?.sourceRect = ShareButton.frame
            presentViewController(activityVC, animated: true, completion: nil)


            print("Share!")    
 }

它工作得很完美！祝大家好运！

Answer 2

尝试设置activityController的起源：

    activityVC.popoverPresentationController?.sourceView = vc?.view
    activityVC.popoverPresentationController?.sourceRect = ShareButton.frame