在package.json中添加这句
"pages": [ //pages数组中第一项表示应用启动页，参考：https://uniapp.dcloud.io/collocation/pages
{
"path": "pages/index/index",
"style": {
"navigationBarTitleText": "uni-app",
"navigationStyle":"custom" // 这里添加这句
}
}
],