objective-c - IOS-Error _OBJC_CLASS_$_ when integrating Aurora IM. . . . . . .

Question

I got an error when integrating an Aurora SDK

Other linker flags are also added -ObjC and -all_load, the path and so on are also checked, and the header file can also be referenced, but an error is reported as soon as it is compiled, both on the real machine and the simulator! Dear masters, what is going on