IOS swift 模拟器中UItextView中使用系统键盘输入汉字后立马崩溃,

Question

IOS swift 模拟器中UItextView中使用系统键盘输入汉字后立马崩溃,但英文没事，从别处复制粘贴的大段中文也没事，但一输入汉字又立马崩溃，跪求高手解救

Terminating app due to uncaught exception 'NSRangeException', reason: '* -[__NSCFString substringFromIndex:]: Index 2 out of bounds; string length 1'

*** First throw call stack:
(
    0   CoreFoundation                      0x0000000108864e65 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x000000010a8cadeb objc_exception_throw + 48
    2   CoreFoundation                      0x0000000108864d9d +[NSException raise:format:] + 205
    3   Foundation                          0x0000000108cf711d -[NSString substringFromIndex:] + 126
    4   艾特便签                        0x00000001066c60dd _TFCX13wtqIJFfHfgzph31CreateInformationViewController17textViewDidChangefS0_FCSo10UITextViewT_ + 509
    5   艾特便签                        0x00000001066c6a4a _TToFCX13wtqIJFfHfgzph31CreateInformationViewController17textViewDidChangefS0_FCSo10UITextViewT_ + 58
    6   UIKit                               0x0000000109d51847 -[UITextView textInputDidChange:] + 109
    7   UIKit                               0x0000000109d97cb7 -[UITextInputController _sendDelegateChangeNotificationsForText:selection:] + 138
    8   UIKit                               0x0000000109d9f751 -[UITextInputController setMarkedText:selectedRange:] + 744
    9   UIKit                               0x0000000109d505a4 -[UITextView setMarkedText:selectedRange:] + 75
    10  UIKit                               0x000000010994bc4a -[UIResponder(UITextInput_Internal) _setMarkedText:selectedRange:] + 91
    11  UIKit                               0x000000010964a2f8 -[UIKeyboardImpl unmarkText:] + 167
    12  UIKit                               0x000000010964cdf6 __59-[UIKeyboardImpl handleAcceptedCandidate:executionContext:]_block_invoke_2 + 39
    13  UIKit                               0x0000000109dba724 -[UIKeyboardTaskQueue continueExecutionOnMainThread] + 332
    14  UIKit                               0x0000000109dbaeb5 -[UIKeyboardTaskQueue waitUntilAllTasksAreFinished] + 237
    15  UIKit                               0x0000000109654ba0 -[UIKeyboardImpl acceptCurrentCandidateForInput:] + 176
    16  UIKit                               0x0000000109a1c854 -[UIKeyboardCandidateBar collectionView:didSelectItemAtIndexPath:] + 298
    17  UIKit                               0x0000000109bf94a7 -[UICollectionView _selectItemAtIndexPath:animated:scrollPosition:notifyDelegate:] + 701
    18  UIKit                               0x0000000109c1b049 -[UICollectionView touchesEnded:withEvent:] + 574
    19  UIKit                               0x00000001095b4ef7 forwardTouchMethod + 349
    20  UIKit                               0x00000001095b4fc0 -[UIResponder touchesEnded:withEvent:] + 49
    21  UIKit                               0x00000001095b4ef7 forwardTouchMethod + 349
    22  UIKit                               0x00000001095b4fc0 -[UIResponder touchesEnded:withEvent:] + 49
    23  UIKit                               0x0000000109881ede _UIGestureRecognizerUpdate + 10279
    24  UIKit                               0x0000000109417f8a -[UIWindow _sendGesturesForEvent:] + 1137
    25  UIKit                               0x00000001094191c0 -[UIWindow sendEvent:] + 849
    26  UIKit                               0x00000001093c7b66 -[UIApplication sendEvent:] + 263
    27  UIKit                               0x00000001093a1d97 _UIApplicationHandleEventQueue + 6844
    28  CoreFoundation                      0x0000000108790a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    29  CoreFoundation                      0x000000010878695c __CFRunLoopDoSources0 + 556
    30  CoreFoundation                      0x0000000108785e13 __CFRunLoopRun + 867
    31  CoreFoundation                      0x0000000108785828 CFRunLoopRunSpecific + 488
    32  GraphicsServices                    0x000000010ccb1ad2 GSEventRunModal + 161
    33  UIKit                               0x00000001093a7610 UIApplicationMain + 171
    34  艾特便签                        0x00000001066bb5fd main + 109
    35  libdyld.dylib                       0x000000010b4c592d start + 1
    36  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) 

Answer 1

Mesej ralat jelas, akses operasi substringFromIndex berada di luar batasan. Anda boleh menyemak kod yang sepadan dengan bahagian program ini.

Answer 2

Saya belum mengeluarkan semula masalah ini, yang baik untuk saya. Ia mungkin ada kaitan dengan pengekodan Semak kod yang anda tulis dalam panggilan balik. Di samping itu, jika terdapat hanya masalah dengan simulator, jangan risau jika mesin sebenar adalah baik. Simulator tidak betul-betul sama dengan mesin sebenar.