ReactNative "___darwin_check_fd_

Xcode报 Undefined symbols for architecture x86_64: "___darwin_check_fd_set_overflow", referenced from: _RAND_poll in libcrypto.a(rand_unix.o) ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) 错误！

这个错误基本无解，要么升级Xcode，要么降级RN版本我的降到0.61.3就好了，要么改Podfile。