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flutter - Flutter Stack 定位和溢出

问题描述

我目前正在研究颤振。我正在将堆栈用于堆栈 2 小部件。但我有一些问题。

这就是我想要做的。

但我的小部件看起来像这样。

那是我的代码：

class UpcomingSessionItem extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Stack(
      clipBehavior: Clip.none,
      alignment: AlignmentDirectional.bottomCenter,
      children: [
        ClipRRect(
            borderRadius: BorderRadius.circular(25),
            child: Image.asset('assets/images/yoga-1.jpg')),
        Container(
          height: 100,
          padding: EdgeInsets.all(20),
          color: Colors.white,
          child: Column(
            children: [
              Row(
                children: [
                  Column(
                    children: [
                      Text(
                        "9 am - 10:30 am",
                        style: TextStyle(fontWeight: FontWeight.bold),
                      ),
                      Text("Yoga for Beginners with Emily Cassel")
                    ],
                  )
                ],
              )
            ],
          ),
        ),
      ],
    );
  }
}

标签： flutterdart

解决方案

用 Positioned Widget 包裹堆栈内的 Container(Widget) 并设置底部、左侧和右侧属性。你会得到输出

您可以通过在编辑器中复制粘贴来尝试此代码。

示例代码在这里

import 'package:flutter/material.dart';

class StackExample extends StatefulWidget {
  @override
  _StackExampleState createState() => _StackExampleState();
}

class _StackExampleState extends State<StackExample> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return
      Container(
      alignment: Alignment.center,
      padding: EdgeInsets.all(20),
      child: Stack(
        clipBehavior: Clip.none,
        alignment: AlignmentDirectional.bottomCenter,
        children: [
          ClipRRect(borderRadius: BorderRadius.circular(25), child: Image.asset('assets/image.png')),
          Positioned(
            bottom: -50,
            right: 20,
            left: 20,
            child: Container(
              height: 150,
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(15),
                color: Colors.white,
              ),
              padding: EdgeInsets.all(20),
              alignment: Alignment.center,
              child: Column(
                mainAxisSize: MainAxisSize.min,
                mainAxisAlignment: MainAxisAlignment.center,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  Text(
                    "TITLE",
                    textAlign: TextAlign.center,
                    style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18, decoration: TextDecoration.none, color: Colors.black),
                  ),
                  SizedBox(
                    height: 20,
                  ),
                  Text(
                    "Hey, There?",
                    textAlign: TextAlign.center,
                    style: TextStyle(fontWeight: FontWeight.bold, fontSize: 14, decoration: TextDecoration.none, color: Colors.black),
                  ),
                  SizedBox(
                    height: 20,
                  ),
                  Text(
                    "This is the example",
                    textAlign: TextAlign.center,
                    style: TextStyle(fontSize: 15, decoration: TextDecoration.none, color: Colors.black),
                  )
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}

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