"tabBar": {     "color": "#71777c",     "selectedColor": "#409eff",     "backgroundColor": "#FFFFFF",     "list": [     {         "text": "首页",         "pagePath": "pages/index/index",         "iconPath": "images/common/classroom.png",         "selectedIconPath": "images/common/classroom-w.png"     },     {         "text": "用户",         "pagePath": "pages/user/user",         "iconPath": "images/common/user.png",         "selectedIconPath": "images/common/user-w.png"     }     ] } [图片] iconpath上的图片能够显示，selectediconpath却不能显示 [图片] 所有图片都是小于5kb的