共享iOS上的QLPreviewController崩溃9

Question

我使用QLPreviewController来预览图像和pdf文件。它适用于iOS7-9。然而，当我点击设备上分享按钮与iOS9，应用程序崩溃，立即与以下情况除外：

Fatal Exception: NSInvalidArgumentException *** -[__NSCFString rangeOfString:options:range:locale:]: nil argument 

这并不与iOS9模拟器发生。我可以在iOS7 & 8的设备上看到AirDrop共享菜单，但在说明的顶部会显示奇怪的(null)标题。这里是链接到样本屏幕截图与iOS7的iPhone 5拍摄：

有任何你遇到过这样的问题？

完整堆栈跟踪从CrashLytics

Thread : Fatal Exception: NSInvalidArgumentException 
0 CoreFoundation     0x00000001860a0f5c __exceptionPreprocess + 124 
1 libobjc.A.dylib    0x000000019ac97f80 objc_exception_throw + 56 
2 CoreFoundation     0x00000001860a0ea4 -[NSException initWithCoder:] 
3 Foundation      0x0000000186efe598 -[NSString rangeOfString:options:range:locale:] + 348 
4 Sharing      0x0000000195064118 -[SFAirDropActivityViewController attributedStringWithTitle:content:] 
5 Sharing      0x00000001950633e0 -[SFAirDropActivityViewController viewDidLoad] 
6 UIKit       0x000000018b5f7610 -[UIViewController loadViewIfRequired] + 1124 
7 UIKit       0x000000018b5f7194 -[UIViewController view] + 28 
8 UIKit       0x000000018bf3a244 __79-[_UIActivityGroupListViewController updateVisibleActivityGroupViewControllers]_block_invoke115 + 112 
9 CoreFoundation     0x0000000185f9e6f0 __53-[__NSArrayI enumerateObjectsWithOptions:usingBlock:]_block_invoke + 100 
10 CoreFoundation     0x0000000185f95418 -[__NSArrayI enumerateObjectsWithOptions:usingBlock:] + 148 
11 UIKit       0x000000018bf39e90 -[_UIActivityGroupListViewController updateVisibleActivityGroupViewControllers] + 456 
12 UIKit       0x000000018bf3a754 -[_UIActivityGroupListViewController viewDidLoad] + 720 
13 UIKit       0x000000018b5f7610 -[UIViewController loadViewIfRequired] + 1124 
14 UIKit       0x000000018b5f7194 -[UIViewController view] + 28 
15 UIKit       0x000000018ba4901c -[UIAlertController setContentViewController:] + 284 
16 UIKit       0x000000018b7f0278 -[UIActivityViewController viewDidLoad] + 1280 
17 UIKit       0x000000018b5f7610 -[UIViewController loadViewIfRequired] + 1124 
18 UIKit       0x000000018b5f7194 -[UIViewController view] + 28 
19 UIKit       0x000000018b969bfc -[UIViewController _setPresentationController:] + 108 
20 UIKit       0x000000018b962e58 -[UIViewController _presentViewController:modalSourceViewController:presentationController:animationController:interactionController:completion:] + 1328 
21 UIKit       0x000000018b964840 -[UIViewController _presentViewController:withAnimationController:completion:] + 4428 
22 UIKit       0x000000018b967278 -[UIViewController _performCoordinatedPresentOrDismiss:animated:] + 472 
23 UIKit       0x000000018b6ee0a4 -[UIViewController presentViewController:animated:completion:] + 184 
24 UIKit       0x000000018bc48c84 _UIDocumentInteractionControllerPresentPopoverFromItemOrShowActivityViewController + 356 
25 UIKit       0x000000018bc48a70 -[UIDocumentInteractionController presentOptionsMenuFromBarButtonItem:animated:] + 264 
26 QuickLook      0x000000018af9d220 -[QLPreviewController actionButtonTapped:] + 220 
27 UIKit       0x000000018b62e3c8 -[UIApplication sendAction:to:from:forEvent:] + 100 
28 UIKit       0x000000018b7ad3dc -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 168 
29 UIKit       0x000000018b62e3c8 -[UIApplication sendAction:to:from:forEvent:] + 100 
30 UIKit       0x000000018b62e344 -[UIControl sendAction:to:forEvent:] + 80 
31 UIKit       0x000000018b616c6c -[UIControl _sendActionsForEvents:withEvent:] + 416 
32 UIKit       0x000000018b616db8 -[UIControl _sendActionsForEvents:withEvent:] + 748 
33 UIKit       0x000000018b62dc5c -[UIControl touchesEnded:withEvent:] + 572 
34 UIKit       0x000000018b62d88c -[UIWindow _sendTouchesForEvent:] + 804 
35 UIKit       0x000000018b626ac0 -[UIWindow sendEvent:] + 784 
36 UIKit       0x000000018b5f7a10 -[UIApplication sendEvent:] + 248 
37 UIKit       0x000000018b5f5efc _UIApplicationHandleEventQueue + 5348 
38 CoreFoundation     0x00000001860585a4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 
39 CoreFoundation     0x0000000186058038 __CFRunLoopDoSources0 + 540 
40 CoreFoundation     0x0000000186055d38 __CFRunLoopRun + 724 
41 CoreFoundation     0x0000000185f84dc0 CFRunLoopRunSpecific + 384 
42 GraphicsServices    0x00000001910d8088 GSEventRunModal + 180 
43 UIKit       0x000000018b65ef44 UIApplicationMain + 204 

Answer 1

我遇到了同样的问题。 我的解决方案是，对SFAirDropActivityViewController执行一些操作。

代码：

@interface SFAirDropActivityViewController : UIViewController 
+ (BOOL)isAirDropAvailable; 
@end 


@implementation SFAirDropActivityViewController 
+ (BOOL)isAirDropAvailable{ 
return NO; 
} 
@end 

PrivateFrameworks地址：

https://github.com/nst/iOS-Runtime-Headers/blob/master/PrivateFrameworks/Sharing.framework/SFAirDropActivityViewController.h