问题
I would like to know how to draw a layer with some color [CGColorRef] in a window
When i am trying to addSubLayer to my window , the application is exiting without showing any exception.
回答1:
If your app is just quitting with no debug error, there still could be a message sent to some deallocated instance. Try turning on NSZombieEnabled by following the instructions here: http://www.codza.com/how-to-debug-exc_bad_access-on-iphone
This will tell you when a bad message is sent.
Further, if you'd like to ask a question involving specific code, you'll get better responses. Try posting your code and maybe we can help you with basic debugging.
来源：https://stackoverflow.com/questions/3638872/draw-a-layer-with-some-color-in-iphone-application