import 'package:flutter/material.dart'; /// create by 张风捷特烈 on 2020-03-25 /// contact me by email 1981462002@qq.com /// 说明: // { // "widgetId": 36, // "priority": 2, // "name": "Placeholder的fallback属性", // "subtitle": " 当所在区域无宽高约束时,占位组件的宽高。" // "【fallbackHeight】: 高 【double】\n" // "【fallbackWidth】: 宽 【double】", // } class FallbackPlaceholder extends StatelessWidget { @override Widget build(BuildContext context) { return UnconstrainedBox( child: Placeholder( color: Colors.blue, strokeWidth: 2, fallbackHeight: 100, fallbackWidth: 150, ), ); } }