iOS开发之'-[__NSCFString appendString:]: nil argument'

来源：互联网发布：淘宝的微淘动态编辑：程序博客网时间：2024/06/01 14:07

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString appendString:]: nil argument'
*** First throw call stack:
(
   0   CoreFoundation                      0x0000000110815b0b __exceptionPreprocess + 171
   1   libobjc.A.dylib                     0x000000010fe66141 objc_exception_throw + 48
   2   CoreFoundation                      0x000000011087e625 +[NSException raise:format:] + 197
   3   CoreFoundation                      0x000000011084b594 mutateError + 196
   4   swft                                0x000000010ed371ba -[QuickTableViewController tableView:cellForRowAtIndexPath:] + 2794
   5   UIKit                               0x000000011107fd98 -[_UIFilteredDataSource tableView:cellForRowAtIndexPath:] + 98
   6   UIKit                               0x0000000110da5ab2 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 750
   7   UIKit                               0x0000000110da5cf8 -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 74
   8   UIKit                               0x0000000110d7a639 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2845
   9   UIKit                               0x0000000110daeccc -[UITableView _performWithCachedTraitCollection:] + 111
   10 UIKit                               0x0000000110d95e7a -[UITableView layoutSubviews] + 233
   11 UIKit                               0x0000000110cfc55b -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1268
   12 QuartzCore                          0x0000000115953904 -[CALayer layoutSublayers] + 146
   13 QuartzCore                          0x0000000115947526 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 370
   14 QuartzCore                          0x00000001159473a0 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
   15 QuartzCore                          0x00000001158d6e92 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
   16 QuartzCore                          0x0000000115903130 _ZN2CA11Transaction6commitEv + 468
   17 UIKit                               0x0000000110c645e7 _afterCACommitHandler + 272
   18 CoreFoundation                      0x00000001107bb717 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
   19 CoreFoundation                      0x00000001107bb687 __CFRunLoopDoObservers + 391
   20 CoreFoundation                      0x00000001107a0720 __CFRunLoopRun + 1200
   21 CoreFoundation                      0x00000001107a0016 CFRunLoopRunSpecific + 406
   22 GraphicsServices                    0x000000011517da24 GSEventRunModal + 62
   23 UIKit                               0x0000000110c39134 UIApplicationMain + 159
   24 swft                                0x000000010ed4358f main + 111
   25 libdyld.dylib                       0x00000001130fc65d start + 1
   26 ???                                 0x0000000000000001 0x0 + 1
)

libc++abi.dylib: terminating with uncaught exception of type NSException

报这个错误的原因是因为拼接的字符串中，有空字符串

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