我下载了最新的1.8.9，在BaseReq里面没有WXMediaMessage的对象，这是怎么回事

• (void)onReq:(BaseReq*)req

{

//获取开放标签传递的extinfo数据逻辑

if (\[req isKindOfClass:\[LaunchFromWXReq class\]\]) 

{

	WXMediaMessage \*msg = req.message;

	NSString \*openID = req.openID;

	NSString \*extinfo = req.msg.messageExt;

	// handle...

}

}