使用@jmpews 的hookzz编译出了Dobby.framework, 但是在hook MGCopyAnswer函数时，能hook到 但原函数地址丢失了，导致调用原函数orig_MGCopyAnswer时程序卡死，cpu跑满：
static CFTypeRef (*orig_MGCopyAnswer)(CFStringRef str);
CFTypeRef new_MGCopyAnswer(CFStringRef str);
CFTypeRef new_MGCopyAnswer(CFStringRef str){
CFTypeRef result = orig_MGCopyAnswer(str); //此处卡死
}
%ctor{
void *MGCopyAnswer_addr = DobbySymbolResolver(NULL, “MGCopyAnswer”);
DobbyHook(MGCopyAnswer_addr, new_MGCopyAnswer,(void *)&orig_MGCopyAnswer);
}