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使用了微信小程序重的自定义tabBar,现在想在app.js执行一些处理,之后设置tabBar内容(数量之类的),不知道如何获取当前自定义tabBar实例?

说明:

  1. 在custom-tab-bar中设置了一些函数来设置tabBar数量内容等,在tabBar页面上可通过 this.getTabBar().tabBarFunction() 的方式设置
  2. 在app.js中直接使用 getTabBar() 似乎是不行的,即使在app.json中引入了custom-tab-bar组件
  3. 是否是在app.js onLaunch时自定义tabbar还未实例化?

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