import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

/*
* 显示网络图片 并加缓存
* */

class CustomNetworkImage extends StatelessWidget {

  const CustomNetworkImage(
      {required this.url, required this.defaultUrl, required this.width, required this.height, Key? key,
      this.boxFit = BoxFit.cover})
      : super(key: key);
  final String url;
  final String defaultUrl;
  final double width;
  final double height;
  final BoxFit boxFit;

  @override
  Widget build(BuildContext context) {
    return url.isNotEmpty
        ? CachedNetworkImage(
            width: width,
            height: height,
            fit: boxFit,
            imageUrl: url,
            imageBuilder: (BuildContext context, ImageProvider<Object> imageProvider) => Container(
              decoration: BoxDecoration(
                image: DecorationImage(
                    image: imageProvider,
                    fit: boxFit,
                    colorFilter: const ColorFilter.mode(
                        Colors.transparent, BlendMode.colorBurn)),
              ),
            ),
            errorWidget: (BuildContext context, String url, Object error) => Image.asset(
              defaultUrl,
              width: width,
              height: height,
              fit: BoxFit.fill,
            ),
          )
        : Image.asset(
            defaultUrl,
            width: width,
            height: height,
            fit: BoxFit.fill,
          );
  }
}