Question

我收到以下错误，请帮我解决一下。我的xcode因以下错误而中止

Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSMutableArray objectAtIndex:]: index 0 beyond bounds for empty array'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x0140a5a9 __exceptionPreprocess + 185
    1   libobjc.A.dylib                     0x0155e313 objc_exception_throw + 44
    2   CoreFoundation                      0x014000a5 -[__NSArrayM objectAtIndex:] + 261
    3   UMMCelebrity                        0x00043903 -[UMMFlickrView photoGallery:urlForPhotoSize:atIndex:] + 115
    4   UMMCelebrity                        0x0004a9d6 -[FGalleryViewController createGalleryPhotoForIndex:] + 422
    5   UMMCelebrity                        0x0004a5ac -[FGalleryViewController loadThumbnailImageWithIndex:] + 172
    6   UMMCelebrity                        0x0004a189 -[FGalleryViewController preloadThumbnailImages] + 281
    7   UMMCelebrity                        0x00046f84 -[FGalleryViewController loadView] + 2132
    8   UIKit                               0x0029d00e -[UIViewController view] + 56
    9   UMMCelebrity                        0x00043050 -[UMMFlickrView pushphotoview] + 192
    10  UMMCelebrity                        0x000446c6 -[UMMFlickrView connection:didReceiveData:] + 2230
    11  Foundation                          0x00996835 _NSURLConnectionDidReceiveData + 159
    12  CFNetwork                           0x033bde72 _ZN19URLConnectionClient21_clientDidReceiveDataEPK8__CFDataPNS_26ClientConnectionEventQueueE + 262
    13  CFNetwork                           0x0348a6b3 _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 247
    14  CFNetwork                           0x0348a9cf _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 1043
    15  CFNetwork                           0x033b5c80 _ZN19URLConnectionClient13processEventsEv + 100
    16  CFNetwork                           0x033b5acf _ZN17MultiplexerSource7performEv + 251
    17  CoreFoundation                      0x013eb8ff __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
    18  CoreFoundation                      0x0134988b __CFRunLoopDoSources0 + 571
    19  CoreFoundation                      0x01348d86 __CFRunLoopRun + 470
    20  CoreFoundation                      0x01348840 CFRunLoopRunSpecific + 208
    21  CoreFoundation                      0x01348761 CFRunLoopRunInMode + 97
    22  GraphicsServices                    0x018e21c4 GSEventRunModal + 217
    23  GraphicsServices                    0x018e2289 GSEventRun + 115
    24  UIKit                               0x001fbc93 UIApplicationMain + 1160
    25  UMMCelebrity                        0x00001d29 main + 121
    26  UMMCelebrity                        0x00001ca5 start + 53
)
terminate called after throwing an instance of 'NSException'

Answer 1

您在空objectAtIndex:上使用参数0呼叫NSMutableArray。

[NSMutableArray objectAtIndex:]: index 0 beyond bounds for empty array

如果您知道NSMutableArray可以为空，则在尝试访问元素之前，应考虑在其上调用count以查看它是否确实包含任何元素。

Answer 2

显然，NSMutableArray中有一个空的-[UMMFlickrView photoGallery:urlForPhotoSize:atIndex:]，并且您使用参数0发送了objectAtIndex:。

Answer 3

这意味着你的NSMutableArray是空的。我认为你没有为NSMutableArray分配内存。阅读此链接，它可能对您有所帮助。 http://www.roseindia.net/answers/viewqa/Mobile-Applications/14614-NSMutableArray-Example-Code.html

Answer 4

可能是第4次点击没有任何内容被推入数组，我不确定，因为我不知道你要做什么。如果你可以添加将对象添加到你的数组中的代码行，我们可以帮助你。

发生此错误是因为数组肯定是空的。

NSMutableArray上的NSRangeException异常

4 个答案: