Flutter - 如何制作自定义 TabBar [英] Flutter - How to make a custom TabBar

问题描述

这是我想要的输出.我还是新手，所以任何人都可以让我知道是否已经有这种开关的小部件或者我应该如何制作一个?另外，如果我选择另一个按钮，我希望此按钮下方显示的数据发生变化，但我想这很明显.

This is the output that I want. I am still new in flutter so can anyone let me know if there is already a widget for this kind of switch or how should I make one ?? Also, I want the data shown below this button to change if I choose the other button but I guess that's obvious.

提前致谢.

推荐答案

您可以使用 TabBar 小部件来实现此目的.我添加了一个完整的示例来演示如何使用 TabBar 小部件来创建它:

You can use the TabBar widget to achieve this. I added a full example demonstrating how you can create this using the TabBar widget:

代码

class StackOver extends StatefulWidget {
  @override
  _StackOverState createState() => _StackOverState();
}

class _StackOverState extends State<StackOver>
    with SingleTickerProviderStateMixin {
  TabController _tabController;

  @override
  void initState() {
    _tabController = TabController(length: 2, vsync: this);
    super.initState();
  }

  @override
  void dispose() {
    super.dispose();
    _tabController.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          'Tab bar',
        ),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          children: [
            // give the tab bar a height [can change hheight to preferred height]
            Container(
              height: 45,
              decoration: BoxDecoration(
                color: Colors.grey[300],
                borderRadius: BorderRadius.circular(
                  25.0,
                ),
              ),
              child: TabBar(
                controller: _tabController,
                // give the indicator a decoration (color and border radius)
                indicator: BoxDecoration(
                  borderRadius: BorderRadius.circular(
                    25.0,
                  ),
                  color: Colors.green,
                ),
                labelColor: Colors.white,
                unselectedLabelColor: Colors.black,
                tabs: [
                  // first tab [you can add an icon using the icon property]
                  Tab(
                    text: 'Place Bid',
                  ),

                  // second tab [you can add an icon using the icon property]
                  Tab(
                    text: 'Buy Now',
                  ),
                ],
              ),
            ),
            // tab bar view here
            Expanded(
              child: TabBarView(
                controller: _tabController,
                children: [
                  // first tab bar view widget 
                  Center(
                    child: Text(
                      'Place Bid',
                      style: TextStyle(
                        fontSize: 25,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                  ),

                  // second tab bar view widget
                  Center(
                    child: Text(
                      'Buy Now',
                      style: TextStyle(
                        fontSize: 25,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}

输出

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