Flutter基础widgets教程-CupertinoTabView篇

CupertinoTabView({
    Key key,
    this.builder,
    this.navigatorKey,
    this.defaultTitle,
    this.routes,
    this.onGenerateRoute,
    this.onUnknownRoute,
    this.navigatorObservers = const <NavigatorObserver>[],
})

builder: (context) {
    switch (index) {
      case 0:
        return Center(
          child: Text('根选项卡-首页'),
        );
        break;
      case 1:
        return Center(
          child: Text('根选项卡-设置'),
        );
        break;
    }
},

不怎么会用