Question

2016-02-09 11：25：11.773 TableView [1408：94586] *由于未捕获的异常'NSRangeException'终止应用程序，原因：'* - [ NSArray0 objectAtIndex：] ：索引0超出空NSArray的边界' ***第一次抛出调用堆栈：（ 0 CoreFoundation 0x0000000111c5fe65 __exceptionPreprocess + 165 1 libobjc.A.dylib 0x00000001116d6deb objc_exception_throw + 48 2 CoreFoundation 0x0000000111c0e395 - [__ NSArray0 objectAtIndex：] + 101 3 TableView 0x000000010f949046 - [FlightDetailsViewController loadInfoToEdit] + 310 4 TableView 0x000000010f94887d - [FlightDetailsViewController viewDidLoad] + 509 5 UIKit 0x0000000110348f98 - [UIViewController loadViewIfRequired] + 1198 6 UIKit 0x000000011034ef4f - [UIViewController __viewWillAppear：] + 120 7 UIKit 0x000000011037ee44 - [UINavigationController _startCustomTransition：] + 1203 8 UIKit 0x000000011038f23f - [UINavigationController _startDeferredTransitionIfNeeded：] + 712 9 UIKit 0x00000001103903af - [UINavigationController __viewWillLayoutSubviews] + 57 10 UIKit 0x0000000110536ff7 - [UILayoutContainerView layoutSubviews] + 248 11 UIKit 0x00000001102694a3 - [UIView（CALayerDelegate）layoutSublayersOfLayer：] + 703 12 QuartzCore 0x000000011507759a - [CALayer layoutSublayers] + 146 13 QuartzCore 0x000000011506be70 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366 14 QuartzCore 0x000000011506bcee _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24 15 QuartzCore 0x0000000115060475 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 277 16 QuartzCore 0x000000011508dc0a _ZN2CA11Transaction6commitEv + 486 17 UIKit 0x00000001101ddb47 _afterCACommitHandler + 174 18 CoreFoundation 0x0000000111b8b367 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION + 23 19 CoreFoundation 0x0000000111b8b2d7 __CFRunLoopDoObservers + 391 20 CoreFoundation 0x0000000111b80f2b __CFRunLoopRun + 1147 21 CoreFoundation 0x0000000111b80828 CFRunLoopRunSpecific + 488 22 GraphicsServices 0x0000000114b2aad2 GSEventRunModal + 161 23 UIKit 0x00000001101b2610 UIApplicationMain + 171 24 TableView 0x000000010f94855f main + 111 25 libdyld.dylib 0x00000001126f292d start + 1 ） libc ++ abi.dylib：以NSException类型的未捕获异常终止（lldb）

Answer 1

正如其他人所提到的（并且你的输出明确指出）你的NSArray是空的。如果您尝试从不存在的NSArray引用索引，则每次都会崩溃。

显然您正在尝试访问索引0处的对象。您可以错误地检查数组是否至少包含项目数作为索引号：

NSArray *myArray = [NSArray arrayWithObject:@"foo"];

int indexDesired = 0; //since you were attempting to access index 0
long indexCount = [myArray count];

if (indexCount > indexDesired) { //check to make sure index exists
    id myObject = [myArray objectAtIndex:indexDesired];
}

libc ++ abi.dylib：以NSException类型的未捕获异常终止：获取此线程

1 个答案: