There is a joystick that connects to Android and iOS devices. On Android it works completely , the unity3d sees it , and work out pressing buttons . And iOS joystick connected , controls the volume and the " home"-button of iPhone, but Unity does not see it .
According to the next, Unity must see it. I have tried all Unity versions. http://docs.unity3d.com/Manual/iphone-joystick.html
If who faced with a problem , please help!