HSW_WX/pages/downloadfile/index.vue

<template></template>

<script>
export default {
  onLoad: function (options) {
    console.log(options);
    //小程序主动返回到上一个页面。即从wxpay page到index page。此时index page的webview已经重新加载了url 了
    //微信小程序的page 也有栈的概念navigateBack 相当于页面出栈的操作
    // debugger
    let file = decodeURIComponent(options.url);

    wx.downloadFile({
      url: options.url,
      showMenu: true,
      // filePath: file,
      success(res) {
        console.log(res);
        var rr = res.tempFilePath;
        console.log("成功");
        wx.openDocument({
          filePath: rr,
          showMenu: true,
          success() {
            wx.navigateBack();
          },
          fail(e) {
            console.log(e);
          },
        });
      },
      fail(res) {
        console.log(res);
        console.log("失败");
      },
    });
  },
};
</script>

<style></style>