flutter:页面切换时的动画

一，代码：

1,定义三个常用动画的类

FadeRoute.dart

import 'package:flutter/material.dart';

class FadeRoute extends PageRouteBuilder {
  final Widget page;

  FadeRoute(this.page) : super(
    pageBuilder: (
        context,
        animation,
        secondaryAnimation,
        ) {
      return page;
    },
    transitionsBuilder: (
        context,
        animation,
        secondaryAnimation,
        child,
        ) {
      return FadeTransition(
        opacity: animation,
        child: child,
      );
    },
    transitionDuration: Duration(milliseconds: 800),
  );
}

SlideRoute.dart

import 'package:flutter/material.dart';

class SlideRoute extends PageRouteBuilder {
  final Widget page;

  SlideRoute(this.page) : super(
    pageBuilder: (
        context,
        animation,
        secondaryAnimation,
        ) {
      return page;
    },
    transitionsBuilder: (
        context,
        animation,
        secondaryAnimation,
        child,
        ) {

      //左侧滑动进入退出
      return SlideTransition(
        position: Tween<Offset>(
            begin: Offset(0.0, 0.5),
            end: Offset(0.0, 0.0)
        ).animate(CurvedAnimation(
            parent: animation,
            //curve:Curves.fastOutSlowIn
            curve:Curves.easeOut
        )),
        child: child,
      );
    },
    transitionDuration: Duration(milliseconds: 400),
  );
}

import 'package:flutter/material.dart';

class ScaleRoute extends PageRouteBuilder {
  final Widget page;

  ScaleRoute(this.page) : super(
    pageBuilder: (
        context,
        animation,
        secondaryAnimation,
        ) {
      return page;
    },
    transitionsBuilder: (
        context,
        animation,
        secondaryAnimation,
        child,
        ) {
      return ScaleTransition(
        //alignment: Alignment.bottomCenter,
        alignment: Alignment.center,
        scale: Tween(
          begin: 0.0,
          end: 1.0,
        ).animate(
          CurvedAnimation(
            parent: animation,
            curve: Curves.easeInOut,
          ),
        ),
        child: child,
      );
    },
    transitionDuration: Duration(seconds: 1),
  );
}

2,切换时调用

import 'package:flutter/material.dart';
import 'package:tangpoem/pages/CopyPage.dart';
import 'package:tangpoem/pages/SystemPage.dart';
import 'package:tangpoem/pages/SaveGalleryPage.dart';
import 'package:tangpoem/common/ScaleRoute.dart';
import 'package:tangpoem/common/SlideRoute.dart';
import 'package:tangpoem/common/FadeRoute.dart';

class MyHomePage extends StatefulWidget {
  //const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  //final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text("首页"),
      ),

      body: SingleChildScrollView(
        child: Center(
          child: Column(
            children: <Widget>[
              SizedBox(height: 5),
              //Text('第一个子组件'),
              ElevatedButton(
                child: Text("系统信息"),
                onPressed: () {
                  Navigator.of(context).push(ScaleRoute(SystemPage(arguments:{'title': "系统信息",'id': 7})));
                },
              ),
              SizedBox(height: 5),
              //Text('第一个子组件'),
              ElevatedButton(
                child: Text("复制粘贴"),
                onPressed: () {
                  Navigator.of(context).push(SlideRoute(CopyPage(arguments:{'title': "复制粘贴",'id': 7})));

                },
              ),
              SizedBox(height: 5),
              //Text('第一个子组件'),
              ElevatedButton(
                child: Text("保存到相册"),
                onPressed: () {
                  //print("这里是首页，点击进入详情页面");
                  // 跳转到第二个界面
                  Navigator.of(context).push(FadeRoute(SaveGalleryPage(arguments:{'title': "保存到相册",'id': 7})));
                },
              ),

            ],
          ),
        ),
      ),
// This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}