swift share работает в iphone, но ошибка в ipad2

Question

Я поместил свою функцию share в файл ShareViewController.swift, он отлично работает в iPhone-симуляторе, но он выходит из строя и закрывает симулятор, когда я запускаю его в симуляторе iPad2. , пожалуйста, помогите дать ан. с каждым шагом. Спасибо!

import UIKit 

class ShareViewController: UIViewController { 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     // Do any additional setup after loading the view. 
    } 

    override func viewDidAppear(animated: Bool) { 
     super.viewDidAppear(animated) 

     let firstActivityItem = "share it!" 

     let activityViewController : UIActivityViewController = UIActivityViewController(activityItems: [firstActivityItem], applicationActivities: nil) 

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

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 


    /* 
    // MARK: - Navigation 

    // In a storyboard-based application, you will often want to do a little preparation before navigation 
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
     // Get the new view controller using segue.destinationViewController. 
     // Pass the selected object to the new view controller. 
    } 
    */ 
} 

Сообщение об ошибке:

2015-07-16 13:35:06.293 pages[2539:46687] *** Terminating app due to uncaught exception 'NSGenericException', reason: 'UIPopoverPresentationController (<_UIAlertControllerActionSheetRegularPresentationController: 0x797fb2c0>) should have a non-nil sourceView or barButtonItem set before the presentation occurs.' 
*** First throw call stack: 
(
    0 CoreFoundation      0x0027c746 __exceptionPreprocess + 182 
    1 libobjc.A.dylib      0x01d10a97 objc_exception_throw + 44 
    2 UIKit        0x0135aee2 -[UIPopoverPresentationController presentationTransitionWillBegin] + 3086 
    3 UIKit        0x00c71124 __71-[UIPresentationController _initViewHierarchyForPresentationSuperview:]_block_invoke + 1549 
    4 UIKit        0x00c6f1f7 __56-[UIPresentationController runTransitionForCurrentState]_block_invoke + 198 
    5 UIKit        0x00ca42cb __40+[UIViewController _scheduleTransition:]_block_invoke + 18 
    6 UIKit        0x00b5d812 ___afterCACommitHandler_block_invoke + 15 
    7 UIKit        0x00b5d7bd _applyBlockToCFArrayCopiedToStack + 415 
    8 UIKit        0x00b5d5d2 _afterCACommitHandler + 549 
    9 CoreFoundation      0x0019d86e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30 
    10 CoreFoundation      0x0019d7b0 __CFRunLoopDoObservers + 400 
    11 CoreFoundation      0x001931ea __CFRunLoopRun + 1226 
    12 CoreFoundation      0x00192a5b CFRunLoopRunSpecific + 443 
    13 CoreFoundation      0x0019288b CFRunLoopRunInMode + 123 
    14 GraphicsServices     0x03f1e2c9 GSEventRunModal + 192 
    15 GraphicsServices     0x03f1e106 GSEventRun + 104 
    16 UIKit        0x00b330b6 UIApplicationMain + 1526 
    17 pages        0x0004eb74 main + 180 
    18 libdyld.dylib      0x02406ac9 start + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb) 

Answer 1

Попробуйте этот пример кода:

@IBAction func ShareIt(sender: AnyObject) { 

    let things = ["Things to share"] 
    let avc = UIActivityViewController(activityItems:things, applicationActivities:nil) 
    avc.setValue("Subject title", forKey: "subject") 
    avc.completionWithItemsHandler = { 
     (s: String!, ok: Bool, items: [AnyObject]!, err:NSError!) -> Void in 
    } 

    self.presentViewController(avc, animated:true, completion:nil) 
    if let pop = avc.popoverPresentationController { 
     let v = sender as! UIView // sender would be the button view tapped, but could be any view 
     pop.sourceView = v 
     pop.sourceRect = v.bounds 
    } 
}