ionic3打包--prod，报错字体文件找不到

问题截图：

image.png
(场景还原：ionic serve运行后，执行ionic cordova build android --prod打包，然后刷新页面。打包过程重新生成了一遍www)

1、安装copyfiles 插件

npm install copyfiles --save

2、创建文件hooks/copy-fonts.js:

var copyfiles = require('copyfiles');
module.exports = function (context) {
    copyfiles([
        'node_modules/ionic-angular/fonts/roboto-regular.ttf',
        'node_modules/ionic-angular/fonts/roboto-regular.woff',
        'node_modules/ionic-angular/fonts/roboto-regular.woff2',
        'node_modules/ionic-angular/fonts/roboto-medium.ttf',
        'node_modules/ionic-angular/fonts/roboto-medium.woff',
        'node_modules/ionic-angular/fonts/roboto-medium.woff2',
        'node_modules/ionic-angular/fonts/roboto-bold.ttf',
        'node_modules/ionic-angular/fonts/roboto-bold.woff',
        'node_modules/ionic-angular/fonts/roboto-bold.woff2',
        'www/assets/fonts'
    ],
    true,
    function (){ console.log("The font files has been copied");}
      );
};

3、在config.xml中配置

<hook src="src/assets/js/hooks/copy-fonts.js" type="after_prepare" />

找到答案的网站：【Ionic build –prod IOS stops without a error message】
补充资料：【关于config.xml的详细说明】