uniapp去掉顶部导航的方法：
1、去掉所有导航栏
"globalStyle": { "navigationBarTextStyle": "white", "navigationBarTitleText": "uni-app", "navigationBarBackgroundColor": "#007AFF", "backgroundColor": "#FFFFFF", "navigationStyle":"custom", "app-plus":{ "titleView":false } }
2、单一页面去掉顶部导航栏
"style": { "navigationBarTitleText": "", "navigationStyle":"custom", }
