我应该如何管理C块功能的内存？ （Apple扩展名）
[英]How should I manage memory for C block feature? (Apple extension)
问题描述
Apple introduced a closure in C as name of 'block'. 
苹果在C语言中引入了一个闭包，称为“ block”。 Should I manage memory for the blocks? 我应该管理块的内存吗？ If so, what do I have to do? 如果是这样，我该怎么办？
1 个解决方案
解决方案1
1 已采纳 2010-08-17 07:46:41
Like variables with function scope in plain C, blocks literals in functions have automatic storage duration. 像普通C语言中具有函数作用域的变量一样，函数中的块字面量具有自动存储时间。 When you think of a block literal as a pointer type you see what can go wrong: When you return a block from a function you are returning a pointer to local memory, which is no longer valid. 当您将块文字视为指针类型时，您会发现出了什么问题：当您从函数返回块时，您将返回指向本地内存的指针，该指针不再有效。
The solution is to use the Block_copy() function whenever you want to return a block and the Block_release() when you no longer need it. 解决方案是，每当您要返回一个块时都使用Block_copy()函数，而在不再需要它时则使用Block_release() 。
More information in this tutorial that has a separate section on blocks in C. 本教程中的更多信息单独介绍了C语言中的块。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.