配置tabBar：对若干一级页面的入口链接。
在app.json中配置tabBar属性。

配置关于和推荐电影

"tabBar": {
    "list": [{
        "pagePath": "pages/about/about",
        "text": "关于",
        "iconPath": "image/icon/ab1.png",
        "selectedIconPath": "image/icon/ab2.png"
      },
      {
      "pagePath": "pages/weekly/weekly",
      "text": "每周推荐",
      "iconPath": "image/icon/m1.png",
            "selectedIconPath":  "image/icon/m2.png"
                }
                ],
                "color": "#000000",
                "selectedColor": "blue"
    
  }

此时前面的链接就会失效
这是设置 open-type为switchTab