页面浏览量颤动如何跳转到另一个页面

问题描述

您好，如果我按下第一个页面选项卡上的按钮，我试图跳转到我的第二个页面选项卡.目前我只知道我的第二页小部件的调用路线，但底部导航栏不存在......我不知道如何从我的第一页标签调用我的父小部件以跳转到第二页标签.

Hello I tried to jump to my second page tab if I press on a button on my first Page tab. Currently I know only call route of my seconde page widget but bottomnavbar isn't present... I don't know how to call my parent widget from my first page tab to jump to the seconde page tab.

  class Parent  {

  int bottomSelectedIndex = 0;

  List<BottomNavigationBarItem> buildBottomNavBarItems() {
    return [
      BottomNavigationBarItem(
          icon: new Icon(Icons.home),
          title: new Text('First')
      ),
      BottomNavigationBarItem(
        icon: new Icon(Icons.search),
        title: new Text('Second'),
      ),

    ];
  }

  PageController pageController = PageController(
    initialPage: 0,
    keepPage: true,
  );

  Widget buildPageView() {
    return PageView(
      controller: pageController,
      onPageChanged: (index) {
        pageChanged(index);
      },
      children: <Widget>[
        First(),
        Second(),

      ],
    );
  }

  @override
  void initState() {
    super.initState();
  }

  void pageChanged(int index) {
    setState(() {
      bottomSelectedIndex = index;
    });
  }

  void bottomTapped(int index) {
    setState(() {
      bottomSelectedIndex = index;
      pageController.animateToPage(index, duration: Duration(milliseconds: 500), curve: Curves.ease);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: buildPageView(),
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: bottomSelectedIndex,
        onTap: (index) {
          bottomTapped(index);
        },
        items: buildBottomNavBarItems(),
      ),
    );
  }
  }

  class first {
        return Container(
    // here a pressbutton for jump to the second widget
        );

    }

----------------------------------------------------------


    class second
        return Container(

        );
    }

推荐答案

你可以这样用:

void onAddButtonTapped(int index) {

  // use this to animate to the page
  pageController.animateToPage(index);

  // or this to jump to it without animating
  pageController.jumpToPage(index);
}

将函数作为参数传递:

class first {
  final void Function(int) onAddButtonTapped;

        return Container(
// call it here onAddButtonTapped(2);
        );

    }

class Second {
  final void Function(int) onAddButtonTapped;

        return Container(
        );

    }

children: <Widget>[
        First(onAddButtonTapped),
        Second(onAddButtonTapped),
      ],

这篇关于页面浏览量颤动如何跳转到另一个页面的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！