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在 Flutter 添加页面过渡动画

2022-04-22 11:47:00 【会煮咖啡的猫咪】

原文

https://medium.com/@aayushkedawat/adding-page-transition-animations-in-flutter-8886a04fea3c

参考

https://pub.dev/packages/page_animation_transition

正文

大家好，在这篇文章中，我们将学习如何添加动画，同时从一个页面到其他在 Flutter。我们将覆盖不同类型的动画和实现基本动画 Flutter 使用包页动画过渡。

page_animation_transition

引言

动画在提升用户体验方面起着至关重要的作用，但动画到底是什么呢？

设计语言，例如 Material，定义了在路线(或屏幕)之间转换时的标准行为。不过，有时候，自定义屏幕之间的转换可以使应用程序更加独特。

在本教程中，我们将使用包页面 page_animation_transition 来简化在页面上添加转换。

使用插件探索不同的转换

第一步: 在 pubspec.yaml 中添加页面动画转换

page_animation_transition

步骤 2: 在 PageOne 上导入库

假设您正在从 PageOne 过渡到 PageTwo

以下是图书馆支持的动画类型:

BottomToTopTransition
TopToBottomTransition
RightToLeftTransition
LeftToRightTransition
FadeAnimationTransition
ScaleAnimationTransition
RotationAnimationTransition
TopToBottomFadedTransition
BottomToTopFadedTransition
RightToLeftFadedTransition
LeftToRightFadedTransition

底到上转换到底转换
右转移
左/右转变
淡化动画/转换
标量动画/转换
转动/动画/转变
上到下到过渡
底部/上部/下部/上部/下部/上部/下部/上部/下部/上部/下部/上部/
右转到/ftfaded/transition
左/右/插入/转换

步骤 3: 添加以下导航代码行

Navigator.of(context).push(PageAnimationTransition(page: const PageTwo(), pageAnimationType: BottomToTopTransition()));

对于预定义的路由:

onGenerateRoute: (settings) {
    switch (settings.name) {
      case '/pageTwo':
        return PageAnimationTransition(child: PageTwo(), pageAnimationType: LeftToRightFadedTransition());
        break;
      default:
        return null;
    }
  }

Navigator.pushNamed(context, '/pageTwo');

Pushnamed (context,’/pageTwo’) ;

Output:

输出:

其他类型转换的完整代码:

import 'package:page_animation_transition/animations/bottom_to_top_faded_transition.dart';
import 'package:page_animation_transition/animations/bottom_to_top_transition.dart';
import 'package:page_animation_transition/animations/fade_animation_transition.dart';
import 'package:page_animation_transition/animations/left_to_right_faded_transition.dart';
import 'package:page_animation_transition/animations/left_to_right_transition.dart';
import 'package:page_animation_transition/animations/right_to_left_faded_transition.dart';
import 'package:page_animation_transition/animations/right_to_left_transition.dart';
import 'package:page_animation_transition/animations/rotate_animation_transition.dart';
import 'package:page_animation_transition/animations/scale_animation_transition.dart';
import 'package:page_animation_transition/animations/top_to_bottom_faded.dart';
import 'package:page_animation_transition/animations/top_to_bottom_transition.dart';
import 'package:page_animation_transition/page_animation_transition.dart';
import 'page_two.dart';
import 'package:flutter/material.dart';class PageOne extends StatelessWidget {
  const PageOne({Key? key}) : super(key: key);[@override](http://twitter.com/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Page Animation Transition'),
        centerTitle: true,
      ),
      body: SizedBox(
        width: MediaQuery.of(context).size.width,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: BottomToTopTransition()));
                },
                child: const Text('Bottom To Top')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: TopToBottomTransition()));
                },
                child: const Text('Top to bottom')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: RightToLeftTransition()));
                },
                child: const Text('Right To Left')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: LeftToRightTransition()));
                },
                child: const Text('Left to Right')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: FadeAnimationTransition()));
                },
                child: const Text('Faded')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: ScaleAnimationTransition()));
                },
                child: const Text('Scale')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: RotationAnimationTransition()));
                },
                child: const Text('Rotate')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: TopToBottomFadedTransition()));
                },
                child: const Text('Top to Bottom Faded')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: BottomToTopFadedTransition()));
                },
                child: const Text('Bottom to Top Faded')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: RightToLeftFadedTransition()));
                },
                child: const Text('Right to Left Faded')),
            ElevatedButton(
                onPressed: () {
                  Navigator.of(context).push(PageAnimationTransition(
                      page: const PageTwo(),
                      pageAnimationType: LeftToRightFadedTransition()));
                },
                child: const Text('Left to Right Faded')),
          ],
        ),
      ),
    );
  }
}

输出: