Xcode ARC（自动引用计数），“释放不可用” [英] Xcode ARC (automatic reference counting), "release is unavailable"

问题描述

我第一次使用Xcode时，我遵循教程。
我所做的一切都是教程告诉我，但我恐怕太过时了。

For my first time using Xcode I was following a tutorial online. I did everything as the tutorial showed me, but I am afraid that it's too outdated.

encounter是：

The error I encounter is:

[font_attributes release]; 

'release'不可用：在自动引用计数模式下不可用

'release' is unavailable: not available in automatic reference counting mode

ARC禁止发布'release'的显示邮件

ARC forbids explicit message send of 'release'

我如何修复 ARC 问题？

推荐答案

您有两个选项：

1）关闭ARC为这个项目。
这是通过在目标的构建设置标签中将Objective-C自动引用计数设置为否

1) Turn off ARC for this project. This is done by setting 'Objective-C Automatic Reference Counting' to NO in the 'Build Settings' tab of your target in the project page.

2）删除所有 retain 发布 autorelease NSAutoReleasePools 和 retainCount 他们为你。除了 NSAutoReleasePool s它们已被 @autorelease {} 替换。

2) Remove all retain release autorelease NSAutoReleasePools and retainCount calls, since ARC makes them for you. With the exception of NSAutoReleasePools They have been replaced by @autorelease{}.

第二个选项已由苹果自动查看此问题以使用重构工具。

这篇关于Xcode ARC（自动引用计数），“释放不可用”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！