app.json 下面导航栏入口，不好带参数

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"tabBar"  : {     "color"             : "#000000",     "backgroundColor"   : "#FFFFFF",     "borderStyle"       : "#C3C3C3",     "selectedColor"     : "#ff8161",     "list"  :   [         {             "pagePath"          : "pages/index/index",             "text"              : "首页",             "iconPath"          : "images/common/index.png",             "selectedIconPath"  : "images/common/index-s.png"         },         {             "pagePath"  : "pages/product/product",//~~~这里不好带参数，即使其他页面由navigateTo进入，也不行，不带参数都不行，导航栏目只有从导航里面进去~~~             "text"      : "产品",             "iconPath"          : "images/common/p.png",             "selectedIconPath"  : "images/common/p-s.png"         },