当在这个应用程序中在iPhone上调用UIActivityViewController时,它可以很好地工作,但是当在iPad上调用时,应用程序崩溃了.以下是我使用的代码：
func shareButtonPress() {
//when the share button is pressed,default share phrase is added,cropped image of highscore is added
var sharingItems = [AnyObject]()
var shareButtonHighscore = NSUserDefaults.standardUserDefaults().objectForKey("highscore") as Int!
sharingItems.append("Just hit \(shareButtonHighscore)! Beat it! #Swath")
UIGraphicsBeginImageContextWithOptions(UIScreen.mainScreen().bounds.size,false,0);
self.view.drawViewHierarchyInRect(view.bounds,afterScreenUpdates: true)
var image:UIImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
sharingItems.append(image)
let activityViewController = UIActivityViewController(activityItems: sharingItems,applicationActivities: nil)
var barButtonItem: UIBarButtonItem! = UIBarButtonItem()
activityViewController.excludedActivityTypes = [UIActivityTypeCopyToPasteboard,UIActivityTypeAirDrop,UIActivityTypeAddToReadingList,UIActivityTypeAssignToContact,UIActivityTypePostToTencentWeibo,UIActivityTypePostToVimeo,UIActivityTypePrint,UIActivityTypeSaveToCameraRoll,UIActivityTypePostToWeibo]
self.presentViewController(activityViewController,animated: true,completion: nil)
}
正如您所看到的,我正在Swift中编程,在SpriteKit框架中,我不明白为什么应用程序崩溃.
我收到此错误：
Terminating app due to uncaught exception 'NSGenericException',reason: 'UIPopoverPresentationController (<_UIAlertControllerActionSheetRegularPresentationController: 0x7fc7a874bd90>) should have a non-nil sourceView or barButtonItem set before the presentation occurs.'
我该怎么做才能解决这个问题？
