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：

-- ::12.088 [:] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 3 beyond bounds [0 .. 2]'
*** First throw call stack:
(
       CoreFoundation                      0x000000010f5be34b __exceptionPreprocess +
       libobjc.A.dylib                     0x000000010f01f21e objc_exception_throw +
       CoreFoundation                      0x000000010f4f8eeb -[__NSArrayI objectAtIndex:] +
                                         0x000000010ea4c889 -[ViewController viewDidLoad] +
       UIKit                               0x000000010fb82c99 -[UIViewController loadViewIfRequired] +
       UIKit                               0x000000010fb830cc -[UIViewController view] +
       UIKit                               0x000000010fa4cc51 -[UIWindow addRootViewControllerViewIfPossible] +
       UIKit                               0x000000010fa4d3a2 -[UIWindow _setHidden:forced:] +
       UIKit                               0x000000010fa60cb5 -[UIWindow makeKeyAndVisible] +
       UIKit                               0x000000010f9d9c89 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] +
      UIKit                               0x000000010f9dfde9 -[UIApplication _runWithMainScene:transitionContext:completion:] +
      UIKit                               0x000000010f9dcf69 -[UIApplication workspaceDidEndTransaction:] +
      FrontBoardServices                  0x0000000112b2f723 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ +
      FrontBoardServices                  0x0000000112b2f59c -[FBSSerialQueue _performNext] +
      FrontBoardServices                  0x0000000112b2f925 -[FBSSerialQueue _performNextFromRunLoopSource] +
      CoreFoundation                      0x000000010f563311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ +
      CoreFoundation                      0x000000010f54859c __CFRunLoopDoSources0 +
      CoreFoundation                      0x000000010f547a86 __CFRunLoopRun +
      CoreFoundation                      0x000000010f547494 CFRunLoopRunSpecific +
      UIKit                               0x000000010f9db7e6 -[UIApplication _run] +
      UIKit                               0x000000010f9e1964 UIApplicationMain +
                                        0x000000010ea4cbbf main +
      libdyld.dylib                       0x000000011239e68d start +
)
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: [0x0000000100001889] (.__TEXT.__text + )
      Summary: `-[ViewController viewDidLoad] +  at ViewController.m:
      Address: [0x0000000100001889] (.__TEXT.__text + )
      Summary: `-[ViewController viewDidLoad] +  at ViewController.m:
(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！！！