以下是我尝试在中实现的代码。我猜未来的方法pickImage会出现问题。我正在使用GetxController扩展该类。该方法预期使用图像裁剪器来拾取和裁剪所选图像，然后如果裁剪成功，则将裁剪后的图像设置为imageFile变量。

import 'dart:io';

import 'package:pamoja/app/data/const.dart';
import 'package:pamoja/app/data/firebase/firebase_functions.dart';
import 'package:pamoja/app/data/global_widgets/indicator.dart';
import 'package:pamoja/app/models/advert_model.dart';
import 'package:pamoja/app/modules/my_adverts/controllers/my_adverts_controller.dart';
import 'package:pamoja/app/routes/app_pages.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:image_picker/image_picker.dart';
import 'package:image_cropper/image_cropper.dart';

class UploadBlogController extends GetxController {
  TextEditingController title = TextEditingController();
  TextEditingController description = TextEditingController();
  TextEditingController location = TextEditingController();
  TextEditingController category = TextEditingController();
  TextEditingController price = TextEditingController();
  TextEditingController phone = TextEditingController();
  final FirebaseFunctions _functions = FirebaseFunctions();
  File? imageFile;

  Future<void> pickImage() async {
    try {
      ImagePicker _picker = ImagePicker();

      await _picker.pickImage(source: ImageSource.gallery).then((value) async {
        if (value != null) {
          File? croppedFile = await ImageCropper().cropImage(
            sourcePath: value.path,
            aspectRatio: CropAspectRatio(ratioX: 1, ratioY: 1),
            compressQuality: 100,
            maxWidth: 700,
            maxHeight: 700,
            // saveCircleCroppedImage: true,
          );

          if (croppedFile != null) {
            imageFile = croppedFile;
            update();
          }
        }
      });
    } catch (e) {
      showAlert("$e");
    }
  }

  void createBlog() async {
    if (title.text.isNotEmpty && description.text.isNotEmpty) {
      if (imageFile != null && imageFile != "") {
        Indicator.showLoading();

        await _functions
            .uploadBlog(
          title.text,
          description.text,
          imageFile!,
          price.text,
          category.text,
          location.text,
          phone.text,
        )
            .then((value) {
          Indicator.closeLoading();
          showAlert("Your advert created sucessfully");
          // Get.back();
          Get.toNamed(Routes.HOME);
        });
      } else {
        showAlert("Image is required");
      }
    } else {
      showAlert("All fields are required");
    }
  }

  void editBlog(BlogsModel model) async {
    Indicator.showLoading();

    if (title.text.isNotEmpty && description.text.isNotEmpty) {
      if (imageFile == null) {
        Map<String, dynamic> map = {
          'title': title.text,
          'description': description.text,
        };

        await _functions.editBlog(model.id, map).then((value) {
          Get.toNamed(Routes.HOME);
          showAlert("Your ads Updated Sucessfully");
        });
      } else {
        String imageUrl = await _functions.uploadImage(imageFile!);

        Map<String, dynamic> map = {
          'title': title.text,
          'description': description.text,
          'img': imageUrl,
        };

        await _functions.editBlog(model.id, map).then((value) {
          Get.toNamed(Routes.HOME);
          showAlert("Your Advert Updated Sucessfully");
        });
      }
    } else {
      showAlert("All fields are required");
    }

    Indicator.closeLoading();
    updateData();
  }

  void updateData() {
    Get.back();
    Get.toNamed(Routes.HOME);
    if (Get.isRegistered<MyBlogsController>()) {
      final controller = Get.find<MyBlogsController>();

      controller.myBlogs = [];
      Indicator.showLoading();
      controller.getMyBlogData();
    }
  }
}