Introduction(介绍) Block objects are a C-level syntactic and runtime feature. They are similar to standard C functions, but in addition to executable code they may also contain variable bindings to automatic (stack) or managed (heap) memory. A block ca…
Declaring and Creating Blocks (声明和创建blocks) Declaring a Block Reference (声明一个block引用) Block variables hold references to blocks. You declare them using syntax similar to that you use to declare a pointer to a function, except that you use ^ instead o…
Conceptual Overview(概览) Block objects provide a way for you to create an ad hoc function body as an expression in C, and C-derived languages such as Objective-C and C++. In other languages and environments, a block object is sometimes also called a “…
Getting Started with Blocks(开始block) The following sections help you to get started with blocks using practical examples. 接下来这一节有实用的例子帮你开始blocks. Declaring and Using a Block (定义和使用block) You use the ^ operator to declare a block variable and to indic…