Could i build a ARC framework and use it in a non-ARC project?

Question

我认为标题很好地解释了我的问题，我目前正在研究一个小框架以满足我的个人需求，并考虑用ARC构建它（如果可能的话）？并在以前构建的旧项目中使用它弧？

Answer 1

Yes, with one caveat: if you have iOS 4.x as a deployment target, a supplemental library is necessary to deal with ARC-compiled code on the older runtime. For an application built using ARC, this is packaged in with the application. This is not included if you are using an ARC-compiled library in a non-ARC application.

You can manually link this library into your non-ARC application to avoid runtime problems on the older OS versions by adding -fobjc-arc to your Other Linker Flags for the application.

See this Apple Developer Forums thread for some more discussion on this.

Answer 2

You can link against the glue library provided by Apple (as Brad has said in his answer above). However, the __weak variable qualifier is not compatible with operating systems below 4.3 (As mentioned here: iOS 5 Best Practice (Release/retain?) in a comment by sudo).

Answer 3

Should be fine. The library is already compiled, so ARC/NonARC shouldn't matter anymore.