Unity to value the ios app to collapse， xocde Crash info.

After my iOS project integrated unity by value interaction appear crash, I set the xcode Exception Breakpoint sometimes melt tip for: m_wrapper_managed_to_native_object___icall_wrapper_mono_string_new_wrapper_intptr error is as follows: Xcode collapse tip: Thread 1: EXC_BAN_ACCESS (code = 1, the address = 0 x28) For my request for help, this problem can explain the problem detail?thank you