arc eye

IOS arc VS mrc learning notes I,* Core Foundation and objective-c Object Exchange * The ARC Management mechanism required for Core Foundation and objective-cObject exchange is as follows: (1) (_ bridge_transfer) op or alternatively CFBridgingRelease (op) is used to consume a retain-count of a CFTypeRef while transferring it over to ARC. This cocould also be repre

The basic idea is that arc is not supported.CodeSeparate from the support for arc, and set the compilation options in xcode to allow code that supports and does not support arc to coexist. Cocos2d is the most popular 2D game engine in iOS app development. However, during cocos2d development, Apple has not launched the automatic reference counting (

Draw lines on canvasArticleIn, I talked about the method of drawing a straight line. The article on drawing a curve should have been published. However, because the canvas draw curve is special, I have not understood it yet, so I should try it step by step. One of the difficulties in drawing a curve in canvas is that there are four functions for connecting the curve! They areArc,Arcto,Quadraticcurveto,Beziercurveto. Let me start with the simplest method of

Role • strong: equivalent to "retain", an attribute becomes the owner of an object.• Weak: the attribute is weak pointer. It is automatically set to nil when the object is released. Remember the OutletWeak should be used• Unsafe_unretained: equivalent to the previous "assign", which should be used only for iOS 4• Copy: similar to the previous copy, copy an object and create a strong association.• Assign: the object cannot use assign, but the original type (BOOL, int, float) can still be used Re

From http://www.yifeiyang.net/development-of-the-iphone-simply-1/ At the beginning of the new year, Vientiane was updated. From the beginning of the new year, let's take a closer look at the iPhone development. First, let's take a look at arc. What is arc? ARC is a new feature launched by iOS 5, which is called Automation Reference counting ). Simply put, it i

Teach you arc, which introduces some of the features of Arc, and the method of converting non-ARC engineering into ARC EngineeringOfficial ARC Apple DocumentLet me introduce the arc in my own words and write down the questions and

Automatic Reference Counting (ARC) is a compile-time technology that simplifies the memory management of OBJECTIVE-C programming with this technique.Here I translate this technique into automatic memory counter management technology, which is the difference between OBJECTIVE-C code that uses and does not use this technique.Arc technology is released with XCode4.2, and in the default project template, you can specify whether your project supports

Hint: the "instance variable" in this article is "member variable", and "local variable" is "local variable" 0. Introductionarc is a new feature that has been added since iOS 5, eliminating the cumbersome manual management of memory, and the compiler automatically inserts the appropriate retain, release, and autorelease statements where appropriate. You no longer need to worry about memory management, because the compiler handles everything for youNote: ARC