Flutter IgnorePointer

禁止用户与组件的交互，防止用户误操作或。。。

ignoring属性为是否与组件进行操作。

/// Flutter code sample for IgnorePointer

// The following sample has an [IgnorePointer] widget wrapping the `Column`
// which contains a button.
// When [ignoring] is set to `true` anything inside the `Column` can
// not be tapped. When [ignoring] is set to `false` anything
// inside the `Column` can be tapped.

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

/// This is the main application widget.
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: _title,
      home: MyStatefulWidget(),
    );
  }
}

/// This is the stateful widget that the main application instantiates.
class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

/// This is the private State class that goes with MyStatefulWidget.
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  bool ignoring = false;
  void setIgnoring(bool newValue) {
    setState(() {
      ignoring = newValue;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        centerTitle: true,
        title: ElevatedButton(
          onPressed: () {
            setIgnoring(!ignoring);
          },
          child: Text(
            ignoring ? 'Set ignoring to false' : 'Set ignoring to true',
          ),
        ),
      ),
      body: Center(
        child: IgnorePointer(
          ignoring: ignoring,
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: <Widget>[
              Text('Ignoring: $ignoring'),
              ElevatedButton(
                onPressed: () {},
                child: const Text('Click me!'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}