Undefined symbols for architecture arm64

Undefined symbols for architecture arm64: “OBJC_CLASS$_文件名”, referenced from: 问题

Undefined symbols for architecture arm64:
“OBJC_CLASS$_文件名”, referenced from:
objc-class-ref in XXXX.o
ld: symbol(s) not found for architecture arm64
解决方法一：在项目配置中添加系统类库：文件名.framework
xcproj->Targets->Build Phases->Link Binary With Libraries-> +framework

解决方法二：
Undefined symbols for architecture arm64

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