小程序开发工具不显示tobar图标

很无语

"tabBar": {“position”：“bottom”，    "selectedColor": "#2A8CEF",    "borderStyle": "white",    "list": [      {        "pagePath": "pages/index/index",        "iconPath": "dist/images/tobar-jianbao.png",        "selectedIconPath": "dist/images/tobar-jianbao-active.png",        "text": "快报"      },]}

愿意是加了“position”：“bottom”，去掉就显示了