Flutter OutlinedButton：设置禁用颜色

Question

在我的 Flutter 应用程序中，我有一个带圆角的 OutlinedButton：

OutlinedButton(
  child: Text(
    "a label",
  ),
  onPressed: () {
     // do something
  },
  style: OutlinedButton.styleFrom(
    primary: Colors.white,
    backgroundColor: MyColor.colorAccent,
    shape: const RoundedRectangleBorder(
      borderRadius: BorderRadius.all(
        Radius.circular(10),
      ),
    ),
  ),
)

现在我需要为禁用状态设置按钮样式，但我不需要如何知道这个小部件（在 EevatedButton 上我使用 MaterialStateProperty.resolveWith 作为backgroundColor，但不适合 OutlinedButton)

Answer 1

这不是最佳做法，但您可以这样做

bool? _isdisabled ;
//null check , if u are on an older version of dart of you want to declare it just do this :
bool _isdisabled = false;
 
OutlinedButton(
  child: Text(
    "a label",
  ),
  onPressed: () {
     // do something
  },
  style:_isdisabled==false? OutlinedButton.styleFrom(
    primary: Colors.white,
    backgroundColor: MyColor.colorAccent,
    shape: const RoundedRectangleBorder(
      borderRadius: BorderRadius.all(
        Radius.circular(10),
      ),
    ),
  ): //another style ,
)

Answer 2

我不知道这个代码示例是否可以帮助回答您的问题，先生。

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  // This widget is the root of your application.
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool isEnableButton = true;
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: Center(
          child: Container(
            child: OutlinedButton(
              child: Text(
                "a label",
              ),
              onPressed: () {
                setState(() {
                  if (isEnableButton) {
                    isEnableButton = false;
                  } else {
                    isEnableButton = true;
                  }
                });
              },
              style:
                  isEnableButton ? enableButtonStyle() : disableButtonStyle(),
            ),
          ),
        ),
      ),
    );
  }

  dynamic disableButtonStyle() {
    return OutlinedButton.styleFrom(
      primary: Colors.black,
      backgroundColor: Colors.grey,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.all(
          Radius.circular(10),
        ),
      ),
    );
  }

  dynamic enableButtonStyle() {
    return OutlinedButton.styleFrom(
      primary: Colors.black,
      backgroundColor: Colors.green,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.all(
          Radius.circular(10),
        ),
      ),
    );
  }
}

Flutter OutlinedButton：设置禁用颜色

Flutter OutlinedButton: set disabled color

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flutter-widget