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? 10
#if!__has_feature(objc_arc)#warningThisfilemustbecompiledwithARC.Use-fobjc-arcflag(or...
#if ! __has_feature(objc_arc)
#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
#endif 展开
#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
#endif 展开
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