大佬教程收集整理的这篇文章主要介绍了为什么在iOS 7下刷卡到删除会崩溃？，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
要重新创建,只需在CoreDataRecipes下载并运行项目.然后(1)点击,例如,Macaroons查看配方中的成分,(2)滑动以删除成分和(3)刷上另一种成分.崩溃.
我的问题是：我是否错过了示例项目代码中的错误,或者这实际上是操作系统中的错误？其次,是否有一种解决方法可以识别这种情况并对其进行防御,但是仍然允许滑动删除？ (现在,我只是通过从tableView返回UITableViewCellEdiTingStyleNone来禁用滑动删除：ediTingStyleForRowATindexPath：除非我已经处于编辑模式.)
在这样的列表中,“编辑”按钮向tableVC发送setEdiTing：YES,在新行中添加“添加项”按钮(显然允许向列表中添加新项),并且现有项获得添加红色减号图标以允许删除.完成后,Done发送setEdiTing：NO,删除新行和图标.一切正常. (参见下面的调试输出中的案例1).
相反,如果用户只想删除单个项目,则可以通过滑动项目来执行此操作(并通过按delete键确认).为了保持一致,滑动还向tableVC发送setEdiTing：YES,然后delete按钮都发送commitEdiTingStyle：delete消息和setEdiTing：NO消息.问题是系统要求在这两个消息之间的表中行数,而不是在setEdiTing：NO之后.因此,它记得还有一行而不是实际的行.然后,如果您对表执行任何操作(例如再次单击“编辑”,再次插入“添加”行),则会看到不一致的行数和崩溃.请参见下面输出中的案例2.
顺便说一句,我认为如果你进行滑动删除会有第二个错误,但是改变主意并点击完成(而不是点击删除以外的任何地方).它再次递归调用setEdiTing：YEs.见输出中的案例3
============= >>CASE 1: Using Edit control to setEdiTing 2013-12-29 11:02:04.032 Recipes[10287:70b] Num Rows: 4 2013-12-29 11:02:04.035 Recipes[10287:70b] Num Rows: 4 -Hit Edit 2013-12-29 11:02:14.720 Recipes[10287:70b] setEdiTing: On 2013-12-29 11:02:14.725 Recipes[10287:70b] InserTing Add row 4 2013-12-29 11:02:14.726 Recipes[10287:70b] Num Rows: 4 +1 2013-12-29 11:02:14.727 Recipes[10287:70b] Providing Add Cell for row 4 -Hit EditControl ("-") then delete 2013-12-29 11:02:21.806 Recipes[10287:70b] deleting ingredient at row 2 2013-12-29 11:02:21.808 Recipes[10287:70b] Num Rows: 3 +1 -Hit Done 2013-12-29 11:02:28.032 Recipes[10287:70b] setEdiTing: Off 2013-12-29 11:02:28.036 Recipes[10287:70b] deleting Add row 3 2013-12-29 11:02:28.036 Recipes[10287:70b] Num Rows: 3 CASE 2: Using Swipe to delete 2013-12-29 11:03:21.705 Recipes[10304:70b] Num Rows: 4 2013-12-29 11:03:21.707 Recipes[10304:70b] Num Rows: 4 -Swipe on row 2 2013-12-29 11:03:34.357 Recipes[10304:70b] setEdiTing: On 2013-12-29 11:03:34.358 Recipes[10304:70b] InserTing Add row 4 2013-12-29 11:03:34.359 Recipes[10304:70b] Num Rows: 4 +1 2013-12-29 11:03:34.359 Recipes[10304:70b] Providing Add Cell for row 4 -Hit delete 2013-12-29 11:03:38.427 Recipes[10304:70b] deleting ingredient at row 2 2013-12-29 11:03:38.431 Recipes[10304:70b] Num Rows: 3 +1 2013-12-29 11:03:38.432 Recipes[10304:70b] setEdiTing: Off 2013-12-29 11:03:38.434 Recipes[10304:70b] deleting Add row 3 NOTE THAT IT DOES >>NOT<< CALL numberOfRows during this delete,but complains that current numberOfRows is wrong. 2013-12-30 23:54:26.349 Recipes[16694:70b] *** Assertion failure in -[UITableView _endCellAnimationsWithContext:],/sourceCache/UIKit_Sim/UIKit-2935.80.1/UITableView.m:1366 2013-12-30 23:54:26.352 Recipes[16694:70b] *** TerminaTing app due to uncaught exception 'NSInternalInconsistencyException',reason: 'Invalid update: invalid number of rows in section 1. @R_772_3244@ of rows contained in an exisTing section after the update (4) must be equal to @R_772_3244@ of rows contained in that section before the update (4),plus or minus @R_772_3244@ of rows inserted or deleted from that section (1 inserted,0 deleted) and plus or minus @R_772_3244@ of rows moved into or out of that section (0 moved in,0 moved out).' *** First throw call stack: ( 0 CoreFoundation 0x01b48c94 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x018c78b6 objc_exception_throw + 44 2 CoreFoundation 0x01b48af8 +[NSException raise:format:arguments:] + 136 3 Foundation 0x005aa1ae -[NSAssertionHandler handleFailureInMethod:object:file:linenumber:description:] + 116 4 UIKit 0x00ab3463 -[UITableView _endCellAnimationsWithContext:] + 13402 5 UIKit 0x00ac313a -[UITableView endupdatesWithContext:] + 51 6 UIKit 0x00ac3168 -[UITableView endupdates] + 41 7 Recipes 0x00009a8c -[RecipeDetailViewController setEdiTing:animated:] + 908 8 UIKit 0x00cab0b5 -[UITableViewController tableView:willBeginEdiTingRowATindexPath:] + 49 9 UIKit 0x00abbb39 -[UITableView _sendWillBeginEdiTingForIndexPath:] + 73 10 UIKit 0x00ac772d -[UITableView _swipeCellAtPoint:] + 346 11 UIKit 0x00c44cd0 -[UITableViewCellScrollView gestureRecognizerShouldBegin:] + 354 12 UIKit 0x00d6d676 -[UIGestureRecognizer _shouldBegin] + 1309 13 UIKit 0x00d69f95 -[UIGestureRecognizer setState:] + 171 14 UIKit 0x00d9a9d7 -[UIPanGestureRecognizer touchesMoved:withEvent:] + 142 15 UIKit 0x00e4dd5a -[UIScrollViewPanGestureRecognizer touchesMoved:withEvent:] + 89 16 UIKit 0x00a1c148 -[UIWindow _sendGesturesForEvent:] + 649 17 UIKit 0x00a1d2e1 -[UIWindow sendEvent:] + 1021 18 UIKit 0x009eff32 -[UIApplication sendEvent:] + 242 19 UIKit 0x009d9ec3 _UIApplicationHandleEventQueue + 11455 20 CoreFoundation 0x01ad1f5f __CFRUNLOOP_IS_CALLING_OUT_TO_A_sourcE0_PERFORM_FUNCTION__ + 15 21 CoreFoundation 0x01ad18eb __CFRunLoopDosources0 + 235 22 CoreFoundation 0x01aee9be __CFRunLoopRun + 910 23 CoreFoundation 0x01aee1e3 CFRunLoopRunSpecific + 467 24 CoreFoundation 0x01aedffb CFRunLoopRunInMode + 123 25 Graphicsservices 0x02f5a2c2 GSEventRunModal + 192 26 Graphicsservices 0x02f5a0e9 GSEventRun + 104 27 UIKit 0x009dcabb UIApplicationMain + 1225 28 Recipes 0x0000257d main + 125 29 Recipes 0x000024f5 start + 53 ) >>CASE 3: Using Swipe to delete but then not deleting,with "Done" 2013-12-29 11:05:20.802 Recipes[10319:70b] Num Rows: 4 2013-12-29 11:05:20.805 Recipes[10319:70b] Num Rows: 4 -Swipe on row 2 2013-12-29 11:05:25.166 Recipes[10319:70b] setEdiTing: On 2013-12-29 11:05:25.167 Recipes[10319:70b] InserTing Add row 4 2013-12-29 11:05:25.168 Recipes[10319:70b] Num Rows: 4 +1 2013-12-29 11:05:25.168 Recipes[10319:70b] Providing Add Cell for row 4 -Hit Done 2013-12-29 11:05:27.685 Recipes[10319:70b] setEdiTing: Off 2013-12-29 11:05:27.686 Recipes[10319:70b] setEdiTing: Off Breakpoint at beginning of setEdiTingAnimated shows: #0 0x00008edb in -[RecipeDetailViewController setEdiTing:animated:] at /Users/hugh/Downloads/iPhoneCoreDataRecipes-2/Classes/RecipeDetailViewController.m:150 #1 0x00c90f1b in -[UITableViewController tableView:didEndEdiTingRowATindexPath:] () #2 0x00aadcbb in -[UITableView _sendDidEndEdiTingForIndexPath:] () #3 0x00ac4a1f in -[UITableView _endSwipeTodeleteRowDiddelete:] () #4 0x00abbdbb in -[UITableView _setEdiTing:animated:forced:] () #5 0x00abbf58 in -[UITableView setEdiTing:animated:] () #6 0x00c90982 in -[UITableViewController setEdiTing:animated:] () #7 0x00008f16 in -[RecipeDetailViewController setEdiTing:animated:] at /Users/hugh/Downloads/iPhoneCoreDataRecipes-2/Classes/RecipeDetailViewController.m:150 #8 0x00afc3ae in -[UIViewController(UINavigationControllerItem) _toggleEdiTing:] () #9 0x01853874 in -[NSObject performSELEctor:withObject:withObject:] () #10 0x009d60c2 in -[UIApplication sendAction:to:from:forEvent:] () #11 0x00caac9b in -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] () NOTE THE REcursIVE CALL TO setEdiTing:animated: AND CONTinUING LEADS TO THE CRASH: 2013-12-29 11:05:27.688 Recipes[10319:70b] deleting Add row 4 2013-12-29 11:05:27.689 Recipes[10319:70b] Num Rows: 4 2013-12-29 11:05:27.693 Recipes[10319:70b] deleting Add row 4 2013-12-29 11:05:27.694 Recipes[10319:70b] Num Rows: 4 2013-12-29 11:05:27.694 Recipes[10319:70b] *** Assertion failure in -[UITableView _endCellAnimationsWithContext:],/sourceCache/UIKit_Sim/UIKit-2903.23/UITableView.m:1076 2013-12-29 11:05:27.697 Recipes[10319:70b] *** TerminaTing app due to uncaught exception 'NSInternalInconsistencyException',reason: 'attempt to delete row 4 from section 1 which only contains 4 rows before the update' *** First throw call stack: ( 0 CoreFoundation 0x01abe5e4 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x018418b6 objc_exception_throw + 44 2 CoreFoundation 0x01abe448 +[NSException raise:format:arguments:] + 136 3 Foundation 0x005a3fee -[NSAssertionHandler handleFailureInMethod:object:file:linenumber:description:] + 116 4 UIKit 0x00aa3373 -[UITableView _endCellAnimationsWithContext:] + 3952 5 UIKit 0x00ab4caa -[UITableView endupdatesWithContext:] + 51 6 UIKit 0x00ab4cd8 -[UITableView endupdates] + 41 7 Recipes 0x000091fc -[RecipeDetailViewController setEdiTing:animated:] + 908 8 UIKit 0x00afc3ae -[UIViewController(UINavigationControllerItem) _toggleEdiTing:] + 73 9 libobjc.A.dylib 0x01853874 -[NSObject performSELEctor:withObject:withObject:] + 77 10 UIKit 0x009d60c2 -[UIApplication sendAction:to:from:forEvent:] + 108 11 UIKit 0x00caac9b -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 139 12 libobjc.A.dylib 0x01853874 -[NSObject performSELEctor:withObject:withObject:] + 77 13 UIKit 0x009d60c2 -[UIApplication sendAction:to:from:forEvent:] + 108 14 UIKit 0x009d604e -[UIApplication sendAction:@R_115_10586@rget:fromSender:forEvent:] + 61 15 UIKit 0x00ace0c1 -[UIControl sendAction:to:forEvent:] + 66 16 UIKit 0x00ace484 -[UIControl _sendActionsForEvents:withEvent:] + 577 17 UIKit 0x00acd733 -[UIControl touchesEnded:withEvent:] + 641 18 UIKit 0x00a1351d -[UIWindow _sendTouchesForEvent:] + 852 19 UIKit 0x00a14184 -[UIWindow sendEvent:] + 1232 20 UIKit 0x009e7e86 -[UIApplication sendEvent:] + 242 21 UIKit 0x009d218f _UIApplicationHandleEventQueue + 11421 22 CoreFoundation 0x01a4783f __CFRUNLOOP_IS_CALLING_OUT_TO_A_sourcE0_PERFORM_FUNCTION__ + 15 23 CoreFoundation 0x01a471cb __CFRunLoopDosources0 + 235 24 CoreFoundation 0x01a6429e __CFRunLoopRun + 910 25 CoreFoundation 0x01a63ac3 CFRunLoopRunSpecific + 467 26 CoreFoundation 0x01a638db CFRunLoopRunInMode + 123 27 Graphicsservices 0x02eae9e2 GSEventRunModal + 192 28 Graphicsservices 0x02eae809 GSEventRun + 104 29 UIKit 0x009d4d3b UIApplicationMain + 1225 30 Recipes 0x00001ced main + 125 31 Recipes 0x00001c65 start + 53
在tableView：commitEdiTingStyle：ediTingStyle：forRowATindexPath：中,在swipe-to-delete的情况下,我们知道’self.ediTing’此时为NO,所以如果你在deleteRows之后添加一个hack调用’self.ediTing’,tableView似乎更新了它的内部numberOfRows.具体来说,之后：
[self.tableView deleteRowsATindexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationTop];
加：
if (!self.ediTing) self.ediTing = NO;
其次,在setEdiTing：animated：中,在删除之前检查附加的“Add Item”行是否实际存在.具体来说,替换：
} else { [self.tableView deleteRowsATindexPaths:ingredientsInserTindexPath withRowAnimation:UITableViewRowAnimationTop]; overviewTextField.placeholder = @""; }
有：
} else { if (ingredientsCount < [self.tableView numberOfRowsInSection:INGREDIENTS_SECTION]) { [self.tableView deleteRowsATindexPaths:ingredientsInserTindexPath withRowAnimation:UITableViewRowAnimationTop]; } overviewTextField.placeholder = @""; }
以上是大佬教程为你收集整理的为什么在iOS 7下刷卡到删除会崩溃？全部内容，希望文章能够帮你解决为什么在iOS 7下刷卡到删除会崩溃？所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错，欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供，作为学习参考使用，版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ：384754419，请注明来意。