导入第三方报错warning: -no_pie ignored for arm64 symbol(s) not found for architecture arm64

最近在老项目里添加BGFMDB及AFNetWorking的时候一直报错，具体错误信息如下： ld: warning: -no_pie ignored for arm64 Undefined symbols for architecture arm64: "_OBJC_CLASS_$_NSManagedObject", referenced from: objc-class-ref in BGToo

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