Flutter 显示边界布局

Flutter开启边界布局

1.导包: import 'package:flutter/rendering.dart';
2.设置debugPaintSizeEnabled = true

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart'; // 1.第一步
import 'login.dart';
 
void main() {
  debugPaintSizeEnabled = true; //2.第二步
  runApp(MyApp());
}
 
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return
       MaterialApp(
          home: new LoginPage(),
        );
  }
}

参考链接 https://blog.csdn.net/BINGXIHEART/article/details/95069223