目标C代码的符号剥离仍然在二进制中留下方法名等

I am trying to strip our iOS application binary of debug symbols to make it more difficult for hackers to modify the binary. I have tried both xcode's symbol stripping (enabling strip linked product and deployment postprocessing) and using "strip -S -x". Both do reduce the number of symbols, but running the binary through "strings" still returns loads of hits.I am trying to strip our iOS application binary