PlatformFile? pickedFile;

  UploadTask? uploadTask;
  Future selectFile()async{
    //final File fileForFirebase = File("${pickedFile!.path}");
    final result= await FilePicker.platform.pickFiles();
    if (result==null) return;
    setState(() {
      pickedFile=result.files.first;
    });

    try {

      final path = 'postfiles/${pickedFile!.name}';
      final file = File(pickedFile!.path!);
      final ref = FirebaseStorage.instance.ref().child(path);
      uploadTask = ref.putFile(file);
      final imageUrl = await uploadTask!.whenComplete(() {});
      final urlDownload = await imageUrl.ref.getDownloadURL();
      print('firebase image =$urlDownload');

      setState(() {
        postfileController.text = urlDownload;
      });
    }catch(e){
    ScaffoldMessenger.of(context).showSnackBar(
    const SnackBar(
    content: Text(
    'check your details /network, and try again',
    ),
    ),
    );
    }
  }