unity和ios交互:
unity调用ios的方法：
c#：[DllImport("__Internal")]
private static extern void _UseIOS();
ios：extern "C"{
void _UseIOS(){ }
}
ios调用c#：
UnitySendMessage("ObjectName", "MethodName", "Message to send");
unity和android交互：
c#调用java：
new AndroidJavaObject(“javaClass”,“method”)
java调用c#:
UnityPlayer.UnitySendMessage("ObjectName", "MethodName", "Message to send");
