isLoggedInBefore method
判断当前是否登录 true 已登录 false 未登录
Implementation
Future<bool> isLoggedInBefore() async{
Map<String, dynamic> result =
await _emClientChannel.invokeMethod(EMSDKMethod.isLoggedInBefore);
if(result['success']){
return result['isLogged'];
}
return false;
}