Flutter插件flutter_whale的使用

当然，基于flutter_whale这个名称，我们可以做出一些合理的推测，这个插件可能与某种“鲸鱼”相关的功能或者是一个具有强大能力的组件（类似于鲸鱼在海洋中的强大地位）。虽然具体的插件功能未定义，但我可以展示一些假设性的Flutter插件使用代码案例，这些案例基于插件可能提供的不同功能。

假设一：flutter_whale 是一个提供强大数据处理能力的插件

import 'package:flutter/material.dart';
import 'package:flutter_whale/flutter_whale.dart'; // 假设这是插件的导入路径

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Whale Demo'),
        ),
        body: Center(
          child: FutureBuilder<String>(
            future: performHeavyComputation(),
            builder: (context, snapshot) {
              if (snapshot.connectionState == ConnectionState.done) {
                if (snapshot.hasError) {
                  return Text('Error: ${snapshot.error}');
                } else {
                  return Text('Result: ${snapshot.data}');
                }
              } else {
                return CircularProgressIndicator();
              }
            },
          ),
        ),
      ),
    );
  }

  Future<String> performHeavyComputation() async {
    // 假设flutter_whale提供了一个强大的数据处理函数
    final WhaleProcessor whaleProcessor = WhaleProcessor();
    return await whaleProcessor.processData(input: "some large dataset");
  }
}

// 假设的WhaleProcessor类
class WhaleProcessor {
  Future<String> processData({required String input}) async {
    // 模拟一个耗时的数据处理过程
    await Future.delayed(Duration(seconds: 3));
    return "Processed Data: $input";
  }
}

假设二：flutter_whale 是一个提供复杂UI组件的插件

import 'package:flutter/material.dart';
import 'package:flutter_whale/flutter_whale.dart'; // 假设这是插件的导入路径

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Whale Complex UI Demo'),
        ),
        body: Center(
          child: WhaleComplexWidget(
            title: "Complex Widget Demo",
            description: "This is a complex widget provided by flutter_whale plugin.",
          ),
        ),
      ),
    );
  }
}

// 假设的WhaleComplexWidget类，由flutter_whale插件提供
class WhaleComplexWidget extends StatelessWidget {
  final String title;
  final String description;

  const WhaleComplexWidget({required this.title, required this.description});

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        Text(
          title,
          style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
        ),
        SizedBox(height: 16),
        Text(
          description,
          style: TextStyle(fontSize: 18),
        ),
        // 假设还有其他复杂的UI组件
        // WhaleSpecialButton(),
        // WhaleAnimatedGraph(),
      ],
    );
  }
}

假设三：flutter_whale 是一个与WebView相关的插件

import 'package:flutter/material.dart';
import 'package:flutter_whale/flutter_whale.dart'; // 假设这是插件的导入路径

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Whale WebView Demo'),
        ),
        body: WebViewScreen(),
      ),
    );
  }
}

class WebViewScreen extends StatefulWidget {
  @override
  _WebViewScreenState createState() => _WebViewScreenState();
}

class _WebViewScreenState extends State<WebViewScreen> {
  late WhaleWebViewController _controller;

  @override
  Widget build(BuildContext context) {
    return WhaleWebView(
      initialUrl: 'https://www.example.com',
      onWebViewCreated: (WhaleWebViewController webViewController) {
        _controller = webViewController;
      },
      javascriptMode: JavascriptMode.unrestricted,
    );
  }

  // 假设的方法，用于与WebView交互（如加载新的URL）
  void _loadUrl(String url) {
    _controller.loadUrl(url);
  }
}

// 假设的WhaleWebView和WhaleWebViewController类
class WhaleWebView extends StatefulWidget {
  final String initialUrl;
  final void Function(WhaleWebViewController) onWebViewCreated;
  final JavascriptMode javascriptMode;

  const WhaleWebView({
    required this.initialUrl,
    required this.onWebViewCreated,
    required this.javascriptMode,
  });

  @override
  _WhaleWebViewState createState() => _WhaleWebViewState();
}

class _WhaleWebViewState extends State<WhaleWebView> {
  @override
  Widget build(BuildContext context) {
    // 这里应该是实际的WebView实现，但由于是假设，所以返回一个占位容器
    return Container();
  }
}

class WhaleWebViewController {
  void loadUrl(String url) {
    // 实际的加载URL逻辑
    print("Loading URL: $url");
  }
}

请注意，以上代码仅是基于flutter_whale名称的假设性实现，并非实际存在的插件功能。如果flutter_whale确实存在，其实际用法和功能应以官方文档或源代码为准。