objective c coding guidelines

Is there any pdf which tells about coding guidelines in objective C.

For Example...

 1. Breaking the 开发者_如何学JAVAfunction names - checkIfHitTheTrack. 
 2. member variables must be like - mVariableName.
 3. Giving better names to subclass - ?

Please share the related links...

I would start with these:

1. Apple's Coding Guidelines for Cocoa
2. Google's Objective-C Style Guide

Take a look at Objective-C Beginner's Guide.