iOS定位到崩溃代码行数

不知道大家是不是在代码调试过程中经常遇到项目崩溃的情况：

比如：

数组越界；

没有实现方法选择器；

野指针；

还有很多很多情况。。。。。。。昨天学到了一种可以直接定位到崩溃代码行数的一个命令，记录一下，和大家分享哟！！！

看下面我的崩溃信息：

2016-11-18 08:43:12.088 11[919:30817] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 3 beyond bounds [0 .. 2]'
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010f5be34b __exceptionPreprocess + 171
    1   libobjc.A.dylib                     0x000000010f01f21e objc_exception_throw + 48
    2   CoreFoundation                      0x000000010f4f8eeb -[__NSArrayI objectAtIndex:] + 155
    3   11                                  0x000000010ea4c889 -[ViewController viewDidLoad] + 185
    4   UIKit                               0x000000010fb82c99 -[UIViewController loadViewIfRequired] + 1258
    5   UIKit                               0x000000010fb830cc -[UIViewController view] + 27
    6   UIKit                               0x000000010fa4cc51 -[UIWindow addRootViewControllerViewIfPossible] + 71
    7   UIKit                               0x000000010fa4d3a2 -[UIWindow _setHidden:forced:] + 293
    8   UIKit                               0x000000010fa60cb5 -[UIWindow makeKeyAndVisible] + 42
    9   UIKit                               0x000000010f9d9c89 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4818
    10  UIKit                               0x000000010f9dfde9 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1731
    11  UIKit                               0x000000010f9dcf69 -[UIApplication workspaceDidEndTransaction:] + 188
    12  FrontBoardServices                  0x0000000112b2f723 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
    13  FrontBoardServices                  0x0000000112b2f59c -[FBSSerialQueue _performNext] + 189
    14  FrontBoardServices                  0x0000000112b2f925 -[FBSSerialQueue _performNextFromRunLoopSource] + 45
    15  CoreFoundation                      0x000000010f563311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    16  CoreFoundation                      0x000000010f54859c __CFRunLoopDoSources0 + 556
    17  CoreFoundation                      0x000000010f547a86 __CFRunLoopRun + 918
    18  CoreFoundation                      0x000000010f547494 CFRunLoopRunSpecific + 420
    19  UIKit                               0x000000010f9db7e6 -[UIApplication _run] + 434
    20  UIKit                               0x000000010f9e1964 UIApplicationMain + 159
    21  11                                  0x000000010ea4cbbf main + 111
    22  libdyld.dylib                       0x000000011239e68d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

再看我定位崩溃代码行命令以及结果显示：

(lldb) image lookup --address 0x000000010ea4c889

      Address: 11[0x0000000100001889] (11.__TEXT.__text + 185)
      Summary: 11`-[ViewController viewDidLoad] + 185 at ViewController.m:20
      Address: 11[0x0000000100001889] (11.__TEXT.__text + 185)
      Summary: 11`-[ViewController viewDidLoad] + 185 at ViewController.m:20
(lldb)

是不是特别方便定位到崩溃的代码行数在 ViewController.m:20。。。。第20行啦！！！

是不是很简单啊，小伙伴么！！！