app.json "tabBar": {    "color": "#666666",    "selectedColor": "#118ee9",    "backgroundColor": "#ffffff",    "list": [      {        "iconPath": "image/home-blur.png",        "selectedIconPath": "image/home-focus.png",        "pagePath": "pages/index/index",        "text": "首页"      },      {        "iconPath": "image/scancode.png",        "pagePath": "pages/scanCode/scanCode",        "text": "扫一扫"      },      {        "iconPath": "image/user-blur.png",        "selectedIconPath": "image/user-focus.png",        "pagePath": "pages/user/user",        "text": "我的"      }    ]  } 过程： 在页面 pages/log/log 使用  wx.reLaunch({    url: '/pages/index/index'  }) 在开发工具上页面路径已经变成了pages/index/index，但是查看调试器wxml布局还是pages/log/log ？？？ 并且底部菜单上面区域为空白 开发工具报错： Can only update a mounted or mounting component. This usually means you called setState, replaceState, or forceUpdate on an unmounted component. This is a no-op.  Please check the code for the u component. （bug不好重现，手机端也会出现这种问题）