1.MallocStackLogging
2.NSZombieEnabled
3.NSDubgEnabled
4.MallocStackLoggingNoCompact
5.MallocScribble
6.malloc: *** error for object 0x38a410: double free
***set a breakpoint in malloc_error_break to debug
方法:(GDB)break malloc_error_break
7.watch the object allocate history
方法:(GDB)shell malloc_history 3939 0xa4e10
8.remove xcode instantly
cmd:sudo /Developer/Library/uninstall-devtools --mode=all
9.Check crash log
1)run app in debug mode in xcode until it crashes
2)Application utility Activity monitor
3)select the crashed app in list and double click to open the info window
4)click sample button
10.change xcode template company name
defaults write com.apple.Xcode PBXCustomTemplateMacroDefinitions '{ "ORGANIZATIONNAME" = "Apple.com.ltd"; }'
