GetUnity().SendMessage

[起个名这么难那就不起了]

function UnityPlayInit(){
//var unity = unityObject.getObjectById("UnityContent");
GetUnity().SendMessage("TeacherScriptInit", "InitByJsonData","[{'ID':'lenggui(Clone)_-10078', 'Name':'lenggui(Clone)', 'posx':263.102203369141, 'posy':0.252544909715652, 'posz':-4.85627555847168, 'rotw':1, 'rotx':0, 'roty':0, 'rotz':0}, {'ID':'bianlijia(Clone)_-10124', 'Name':'bianlijia(Clone)', 'posx':266.540222167969, 'posy':0.755518674850464, 'posz':-2.26838326454163, 'rotw':1, 'rotx':0, 'roty':0, 'rotz':0}]");
alert("ttt");
}
GetUnity().SendMessage 三个参数都不为空
但是报错 TypeError: GetUnity(...) is null
在线等！！！