arc[自動引用計數(Automatic Reference Counting)]

Automatic Reference Counting,自動引用計數。是蘋果公司的Objective-C程式的一種自動記憶體管理機制,區別於MRC(Manual Reference Counting)。

Automatic Reference Counting,自動引用計數。是蘋果公司的Objective-C程式的一種自動記憶體管理機制,區別於MRC(ManualReference Counting)。在Objective-C編程中,當對象的引用計數為0時,該對象釋放,否則不釋放,運用ARC可以使編程人員基本不用考慮對象何時釋放的問題,編譯器會在合適的時間自動將其引用計數為零。這樣的機制不僅使代碼更簡單並且使程式更穩定,蘋果官方對其的一句解釋 “Automatic Reference Counting (ARC) is a compiler feature that provides automatic memory management of Objective-C objects. Rather than having to think about retain and release operations, ARC allows you to concentrate on the interesting code, theobject graphs, and the relationships between objects in your application.”

熱門詞條

聯絡我們