NetworkImage正在缓存旧图像 [英] NetworkImage is caching the old image

问题描述

我正在使用 NetworkImage 类显示来自互联网的图像，以下是代码

I am using NetworkImage class to display an image from the internet, the following is the code

return new Container(
        width: width,
        height: height,
        decoration: new BoxDecoration(
          color: const Color(0xff7c94b6),
          image: new DecorationImage(
            image: NetworkImage(url, headers: {"Authorization": token}),

            fit: fit,
          ),
          borderRadius: new BorderRadius.all(new Radius.circular(150.0)),
          border: new Border.all(
            color: Color(AppColors.surfacePrimary.hex),
            width: 0.0,
          ),
        ),
      );

但是缓存了图像，并且在服务器上更新图像时，应用程序显示旧的缓存的图像。
如何停止 NetworkImage 上的缓存？

However the image is cached, and when the image is updated on the server, the application displays the old cached image. How can I stop the caching on NetworkImage ?

推荐答案

您可以使用以下网址逐出从URL加载的图像

You can evict the image loaded from an URL using

 void evictImage() {
   final NetworkImage provider = NetworkImage(url);
   provider.evict().then<void>((bool success) {
     if (success)
       debugPrint('removed image!');
   });
 }

或者您也可以在URL中添加随机查询部分

or alternatively you can add a random query part to the URL

int counter = 0;
...
NetworkImage('https://example.com/images/image1.png?dummy=${counter++}');

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