1 / 21

Copy from WWDC 2010 session 113

Copy from WWDC 2010 session 113. Objective-C Primary . 邓宇光 iPhone Team. Introduction. Common Concepts Uncommon ideas Categories Selectors Memory Management Retain, Release, Autorelease. Common Concepts. Selectors. Selectors are data structures that represent a method “ slot”name.

viveca
Download Presentation

Copy from WWDC 2010 session 113

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Copy from WWDC 2010 session 113 Objective-C Primary 邓宇光 iPhone Team

  2. Introduction • Common Concepts • Uncommon ideas • Categories • Selectors • Memory Management • Retain, Release, Autorelease

  3. Common Concepts

  4. Selectors • Selectors are data structures that represent a method “slot”name

  5. Memory Management • Using just the right amount of memory and no more • Memory Management starts at the design phase • Object owenership is designed an Directed Acyclic Graph • Ownership arises from simple pattern • Only +alloc, -initXXX, -retain, -copy, +newXXX

  6. Directed Acyclic Graph

  7. Simple Rules • Instance variables are always either • Retained • Not retained • Downlinks are retained • Uplinks are not retained

  8. FutherReading • http://developer.apple.com/videos/wwdc • Blogs • http://www.mikeash.com/pyblog • http://www.cnblogs.com/studentdeng

More Related