uni-app原生的tabbar切换的时候，tabbar闪动

"tabBar": {
"color": "#7a7e83",
"selectedColor": "#0081ff",
"backgroundColor": "#ffffff",
"list": [{
"pagePath": "pages/home/home",
"text": "首页",
"iconPath": "static/img/tab/shouy.png",
"selectedIconPath": "static/img/tab/shouy1.png"
},
{
"pagePath": "pages/video1/video_list1",
"text": "课程",
"iconPath": "static/img/tab/kc.png",
"selectedIconPath": "static/img/tab/kc1.png"
},
{
"pagePath": "pages/practice/practice",
"text": "练习",
"iconPath": "static/img/tab/lx.png",
"selectedIconPath": "static/img/tab/lx1.png"
},
{
"pagePath": "pages/user1/user1",
"text": "我的",
"iconPath": "static/img/tab/wo.png",
"selectedIconPath": "static/img/tab/wo1.png"
}
]
},