downloadfont(c_tag, fonturl) {
    return new Promise((resolve, reject) => {
      wx.showLoading({
        title: '字体加载中'
      })
      wx.loadFontFace({
        family: c_tag,
        global: true,
        source: 'url("' + fonturl + '")',
        scopes: ["webview", "native"],
        success(e) {
          wx.hideLoading();
          resolve(0)
        },
        fail(e) {
          wx.hideLoading()
          resolve(1)
          wx.showToast({
            title: '字体加载失败',
          })
        }
      });
    })
  }