如何为特定文件关闭ARC

本文介绍了如何为特定文件关闭ARC的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我知道我应该将编译器标志 -fno-objc-arc 添加到XCode 4中的编译源来完成此任务。但它没有用。即使添加了标记，我仍然在我的 KeychainItemWrapper.m 文件中收到错误，声称我需要使用 __ bridge 来获取C指针。

I know I am supposed to add the compiler flag -fno-objc-arc to the compile sources in XCode 4 to accomplish this. But it isn't working. Even with the added flag I am still getting errors in my KeychainItemWrapper.m file claiming I need to use __bridge for C pointers.

我的项目是ARC安全的，但Apple提供的与Keychain交互的参考不是。我想为该单个文件禁用ARC。我还缺少什么呢？

My project is ARC safe, but the Apple provided reference for interacting with the Keychain is not. I would like to just disable ARC for that single file. What else am I missing here?

推荐答案

我在4.2中在不同项目中不止一次发生这种情况，但是然后，我无法对bug报告进行足够可靠的重现。但我可以说，在我的情况下，一个干净的构建清理它。

I've had this happen more than once for me in 4.2 in different projects, but then I've not been able to reproduce it reliably enough for a bug report. But I can say in my cases, a clean build cleared it up.