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阿Q吧 > 急求指教，下面的iOS代码啥意思啊？This file must be compiled with ARC，是什么意思？

急求指教，下面的iOS代码啥意思啊？This file must be compiled with ARC，是什么意思？

2025-02-17 01:43:58

推荐回答（2个）

回答1：

This file must be compiled with ARC，意思是说：本文件必须在 ARC（ios sdk 5.0 之后的自动内存管理）下才能编译。

#if ! __has_feature(objc_arc)
#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
#endif

上面判断是否支持arc
如果不支持就报警告 warning

回答2：

本文件必须用ARC编写

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