This document discusses various debugging techniques for iOS applications including: 1. Static and dynamic analysis tools like class-dump, nm, and Xcode's static analyzer to examine code without running. 2. Logging with NSLog and printf and conditional compilation for debug-only logging. 3. Tracing application launch process and using breakpoints, exceptions, and crash reports for runtime debugging. 4. Recommends resources like WWDC videos on debugging, crash reporting, and network tools.

1. Debug
@yarshure

2. 自我介绍
Unix System Admin
Coder(Python/C)
Apple Developer
Core Animation Speech

3. agenda
iOS Application launch
静态/动态分析
调试
发布之后

4. 应用程序启动过程

5. 分析工具
file determine file type
strings find the printable strings in a object, or
other binary, file
otool object file displaying tool
class-dump examining the Objective-C runtime
information stored in Mach-O files
nm display name list (symbol table)

6. Xcode项目编译
xcodebuild -- build Xcode projects
gcc,clang, dsymutil,
lipo,libtool,install_name_tool
codesign -- Create and manipulate
code signatures

7. Xcode项目编译
PackageApplication prepare an
application for submission to
AppStore or installation by iTunes.
productbuild/productsign -- Build
deployable product from Mac OS X
Installer packages.

8. Build log
$ cd /Users/yarshure/Documents/WIFIKey/
$ xcodebuild

9. 静态分析: LLVM/Clang Static Analyzer

10. 动态runing
NSLog,printf
标准输出重定向
freopen( p, "w", stdout);
条件编译, 著名软件Release版也print Log
#ifdef DEBUG
# define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__V
#else
# define DLog(...)

12. 紧急情况

13. IPCU（支持Win）

14. UncaughtExceptions
EXC_BAD_ACCESS is a Mach exception sent by the
kernel to your application when you try to access
memory that is not mapped for your application. If
not handled at the Mach level, it will be translated into
a SIGBUS or SIGSEGV BSD signal.
SIGABRT is a BSD signal sent by an application to
itself when an NSException or obj_exception_throw is
not caught.

15. UncaughtExceptions
http://cocoawithlove.com/2010/05/handling-
unhandled-exceptions-and.html

16. debug

17. 运行选项

18. 断点

20. 重要

24. 新的旅程

25. 终端
/Developer/usr/bin/lldb

26. Crash Reports

27. network Tools

28. 推荐资源
WWDC11 123
WWDC11 319
WWDC11 321