huixiang_app/lib/view_widget/custom_image.dart

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

class MImage extends StatelessWidget {
  final String src;
  final String errorSrc;
  final String fadeSrc;
  final BorderRadius radius;
  final double aspectRatio;
  final double width;
  final double height;
  final BoxFit fit;

  MImage(
    this.src, {
    this.errorSrc = "assets/image/default_2_1.png",
    this.fadeSrc = "assets/image/default_2_1.png",
    this.aspectRatio,
    this.width,
    this.height,
    this.fit,
    this.radius = BorderRadius.zero,
  });

  @override
  Widget build(BuildContext context) {
    var clipRRect = ClipRRect(
      borderRadius: radius,
      child: CachedNetworkImage(
        imageUrl: src,
        cacheManager: DefaultCacheManager(),
        fadeInDuration: Duration(milliseconds: 300),
        fadeOutDuration: Duration(milliseconds: 300),
        imageBuilder: (context, provide) {
          return Image(
            image: provide,
            fit: fit,
          );
        },
        errorWidget: (context, error, stackTrace) {
          return Image.asset(
            errorSrc,
            fit: fit,
          );
        },
        placeholder: (context, placeholder) {
          print("object  $placeholder");
          return Image.asset(
            fadeSrc,
            fit: fit,
          );
        },
      ),
      // child: Image.network(
      //   src,
      //   fit: fit,
      //   errorBuilder: (context, error, stackTrace) {
      //     return Image.asset(
      //       errorSrc,
      //       fit: fit,
      //     );
      //   },
      //   frameBuilder: (context, child, frame, wasSynchronousLoaded) {
      //     if (wasSynchronousLoaded) {
      //       return child;
      //     } else {
      //       return AnimatedCrossFade(
      //         firstChild: child,
      //         layoutBuilder: (widgetFirst, keyFirst, widgetSecond, keySecond) {
      //           return Stack(
      //             clipBehavior: Clip.none,
      //             children: <Widget>[
      //               Positioned(
      //                 key: keySecond,
      //                 left: 0.0,
      //                 top: 0.0,
      //                 right: 0.0,
      //                 bottom: 0.0,
      //                 child: widgetSecond,
      //               ),
      //               Positioned(
      //                 key: keyFirst,
      //                 left: 0.0,
      //                 top: 0.0,
      //                 right: 0.0,
      //                 bottom: 0.0,
      //                 child: widgetFirst,
      //               ),
      //             ],
      //           );
      //         },
      //         secondChild: Image.asset(
      //           fadeSrc,
      //           fit: fit,
      //         ),
      //         crossFadeState: frame != null
      //             ? CrossFadeState.showFirst
      //             : CrossFadeState.showSecond,
      //         duration: Duration(milliseconds: 500),
      //       );
      //     }
      //   },
      //   excludeFromSemantics: true,
      // ),
    );

    if (aspectRatio != null && aspectRatio > 0) {
      return Container(
        child: AspectRatio(
          aspectRatio: aspectRatio,
          child: clipRRect,
        ),
      );
    } else {
      return Container(
        width: width,
        height: height,
        child: clipRRect,
      );
    }
  }
}