ios - swift 2 : UITableView 'reloadSections' method crash in iOS 9

Question

在强制升级到 Swift 2.x 之前，我的应用程序运行良好。我下面的代码是在 IBAction 上执行的，用于“折叠”单元格的按钮，例如它用另一个布局替换它，然后尝试重新加载单元格，由于各种原因，我被迫将每个单元格包含在它自己的部分中(因此，我正在重新加载该部分)。我试过将各种变量输出到终端；输入是正确的。我也试过将它包装在 .beginUpdates() 和 .endUpdates() 中，当在调试器中遍历它时，它只会在 .endUpdates() 调用而不是 .reloadSections() 调用上抛出以下异常。我还尝试用对 .reloadData() 的全面调用替换 .reloadSections() 并且我收到相同的堆栈跟踪，让我相信它在某种程度上是 TableView 对象的内部。

// Set Selected Patient Configuration to "Collapsed"
patientList.patients[ sender.tag ].updateConfiguration( collapsedConfiguration )
let animation = UITableViewRowAnimation.Automatic

// Retrieve Current Table View and Animate Changes
let tableView = self.superview!.superview as! UITableView

// Reload Section with Animation
tableView.reloadSections(NSIndexSet( index: sender.tag ), withRowAnimation: animation )

我的代码将评估支持数据的折叠状态，并在完整 View 或折叠 View 中绘制它。

*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM insertObject:atIndex:]: index 2 beyond bounds [0 .. 0]'
*** First throw call stack:
(
    0   CoreFoundation                      0x00e2fa84 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x03235e02 objc_exception_throw + 50
    2   CoreFoundation                      0x00cdd211 -[__NSArrayM insertObject:atIndex:] + 881
    3   Foundation                          0x01510134 -[NSKeyValueSlowMutableArray insertObject:atIndex:] + 115
    4   CoreFoundation                      0x00d38630 -[NSMutableArray insertObjects:count:atIndex:] + 192
    5   CoreFoundation                      0x00d38322 -[NSMutableArray insertObjectsFromArray:range:atIndex:] + 322
    6   CoreFoundation                      0x00d381c2 -[NSMutableArray addObjectsFromArray:] + 834
    7   UIKit                               0x024f4d4f -[UIRuntimeOutletCollectionConnection performConnect] + 964
    8   UIKit                               0x024f4daf -[UIRuntimeOutletCollectionConnection connect] + 33
    9   libobjc.A.dylib                     0x0324a00c -[NSObject performSelector:] + 62
    10  CoreFoundation                      0x00d60571 -[NSArray makeObjectsPerformSelector:] + 273
    11  UIKit                               0x021b06f6 -[UINib instantiateWithOwner:options:] + 2102
    12  UIKit                               0x01eeed6c -[UITableView _dequeueReusableViewOfType:withIdentifier:] + 457
    13  UIKit                               0x01eef173 -[UITableView dequeueReusableCellWithIdentifier:] + 48
    14  Halo                                0x001b5174 _TFC4Halo18MainViewController9tableViewfS0_FTCSo11UITableView21cellForRowAtIndexPathCSo11NSIndexPath_CSo15UITableViewCell + 2356
    15  Halo                                0x001be459 _TToFC4Halo18MainViewController9tableViewfS0_FTCSo11UITableView21cellForRowAtIndexPathCSo11NSIndexPath_CSo15UITableViewCell + 89
    16  UIKit                               0x01f03a19 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 782
    17  UIKit                               0x01f03b47 -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 90
    18  UIKit                               0x022568cc -[_UITableViewUpdateSupport(Private) _setupAnimationsForNewlyInsertedCells] + 8353
    19  UIKit                               0x0226181a -[_UITableViewUpdateSupport _setupAnimations] + 161
    20  UIKit                               0x01ed7fd3 -[UITableView _updateWithItems:updateSupport:] + 3653
    21  UIKit                               0x01ecfc91 -[UITableView _endCellAnimationsWithContext:] + 17491
    22  UIKit                               0x01eea538 -[UITableView _updateSections:updateAction:withRowAnimation:headerFooterOnly:] + 460
    23  UIKit                               0x01eea625 -[UITableView reloadSections:withRowAnimation:] + 73
    24  Halo                                0x00105e10 _TFC4Halo28FullPatientViewTableViewCell19collapseButtonPressfS0_FCSo8UIButtonT_ + 6208
    25  Halo                                0x0010645d _TToFC4Halo28FullPatientViewTableViewCell19collapseButtonPressfS0_FCSo8UIButtonT_ + 61
    26  libobjc.A.dylib                     0x0324a0b5 -[NSObject performSelector:withObject:withObject:] + 84
    27  UIKit                               0x01d8016a -[UIApplication sendAction:to:from:forEvent:] + 118
    28  UIKit                               0x01d800e9 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 64
    29  UIKit                               0x01f1e19f -[UIControl sendAction:to:forEvent:] + 79
    30  UIKit                               0x01f1e51f -[UIControl _sendActionsForEvents:withEvent:] + 408
    31  UIKit                               0x01f1d525 -[UIControl touchesEnded:withEvent:] + 714
    32  UIKit                               0x022efeaa _UIGestureRecognizerUpdate + 12763
    33  UIKit                               0x01dfabdf -[UIWindow _sendGesturesForEvent:] + 1559
    34  UIKit                               0x01dfc298 -[UIWindow sendEvent:] + 1137
    35  UIKit                               0x01da1efb -[UIApplication sendEvent:] + 266
    36  UIKit                               0x01d77cb6 _UIApplicationHandleEventQueue + 7802
    37  CoreFoundation                      0x00d49d1f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
    38  CoreFoundation                      0x00d3f9ab __CFRunLoopDoSources0 + 523
    39  CoreFoundation                      0x00d3edc8 __CFRunLoopRun + 1032
    40  CoreFoundation                      0x00d3e706 CFRunLoopRunSpecific + 470
    41  CoreFoundation                      0x00d3e51b CFRunLoopRunInMode + 123
    42  GraphicsServices                    0x058c0664 GSEventRunModal + 192
    43  GraphicsServices                    0x058c04a1 GSEventRun + 104
    44  UIKit                               0x01d7e1eb UIApplicationMain + 160
    45  Halo                                0x0011eb6c main + 140
    46  libdyld.dylib                       0x03ceca21 start + 1
    47  ???                                 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

堆栈对我帮助不大，我什至无法理解开头的消息:“insertObject:atIndex:]: index 2 beyond bounds [0 .. 0]。”在这个示例和我使用单个表条目的测试中，没有任何地方应该有索引“2”。如果您能提供任何帮助，我们将不胜感激。

这是我对此异常的“bt”:

* thread #1: tid = 0xc9ca7, 0x0401969a libsystem_kernel.dylib`__pthread_kill + 10, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x0401969a libsystem_kernel.dylib`__pthread_kill + 10
    frame #1: 0x03fe4634 libsystem_pthread.dylib`pthread_kill + 101
    frame #2: 0x03d9339d libsystem_c.dylib`abort + 156
    frame #3: 0x04034ae7 libc++abi.dylib`abort_message + 151
    frame #4: 0x04055683 libc++abi.dylib`default_terminate_handler() + 300
    frame #5: 0x032360b6 libobjc.A.dylib`_objc_terminate() + 108
    frame #6: 0x04052d0d libc++abi.dylib`std::__terminate(void (*)()) + 14
    frame #7: 0x0405293e libc++abi.dylib`__cxa_rethrow + 103
    frame #8: 0x03235fad libobjc.A.dylib`objc_exception_rethrow + 47
    frame #9: 0x00d3e7d0 CoreFoundation`CFRunLoopRunSpecific + 672
    frame #10: 0x00d3e51b CoreFoundation`CFRunLoopRunInMode + 123
    frame #11: 0x058c0664 GraphicsServices`GSEventRunModal + 192
    frame #12: 0x058c04a1 GraphicsServices`GSEventRun + 104
    frame #13: 0x01d7e1eb UIKit`UIApplicationMain + 160
  * frame #14: 0x0011eb6c Halo`main + 140 at AppDelegate.swift:26
    frame #15: 0x03ceca21 libdyld.dylib`start + 1

根据请求，这里是输出后的代码:

    // Retrieve Current Table View and Animate Changes
    let tableView = self.superview!.superview as! UITableView

    // Test Output
    print( "tableView.numberOfSections: \(tableView.numberOfSections)" )
    print( "tableView.numberOfRowsInSection( sender.tag ): \(tableView.numberOfRowsInSection( sender.tag ))" )

    // Reload Section with Animation
    tableView.reloadSections(NSIndexSet( index: sender.tag ), withRowAnimation: animation )

    tableView.numberOfSections: 1
    tableView.numberOfRowsInSection( sender.tag ): 1

Answer 1

堆栈跟踪的这一部分(可能)意味着您有一个 IBOutletCollection，并且 UIKit 现在正在尝试从 Storyboard或 nib 填充它:

7   UIKit                               0x024f4d4f -[UIRuntimeOutletCollectionConnection performConnect] + 964
8   UIKit                               0x024f4daf -[UIRuntimeOutletCollectionConnection connect] + 33

这部分看起来像是在尝试将绑定(bind)对象添加到现有数组:

2   CoreFoundation                      0x00cdd211 -[__NSArrayM insertObject:atIndex:] + 881
3   Foundation                          0x01510134 -[NSKeyValueSlowMutableArray insertObject:atIndex:] + 115
4   CoreFoundation                      0x00d38630 -[NSMutableArray insertObjects:count:atIndex:] + 192
5   CoreFoundation                      0x00d38322 -[NSMutableArray insertObjectsFromArray:range:atIndex:] + 322
6   CoreFoundation                      0x00d381c2 -[NSMutableArray addObjectsFromArray:] + 834

所有这些都意味着该错误可能与您发布的代码无关，而是与您的 nib 以及它如何与绑定(bind)的属性交互有关。

看看您是否正在使用 IBOutletCollection，如果是，请开始调试它所绑定(bind)的东西。