Flutter Flare 动画无法正常工作答案

【问题标题】：Flutter Flare animation not working properlyFlutter Flare 动画无法正常工作
【发布时间】：2019-07-29 03:49:01
【问题描述】：

我正在尝试让 Flare 动画在 Flutter 中工作。为此，我尝试了这个： https://github.com/tarek360/Boring-Star-Animation

实际上，该代码工作非常好。但是，我想将动画更改为： https://www.2dimensions.com/a/innocent/files/flare/status_success

现在，代码运行并显示动画，但仍然存在。（即没有动画，只显示照片）我得到以下错误：

E/flutter ( 7462): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: NoSuchMethodError: The method '*' was called on null.
E/flutter ( 7462): Receiver: null
E/flutter ( 7462): Tried calling: *(0.0)
E/flutter ( 7462): #0      Object.noSuchMethod (dart:core/runtime/libobject_patch.dart:50:5)
E/flutter ( 7462): #1      KeyFrameStrokeEnd.setValue (package:flare_dart/animation/keyframe.dart:1161:33)
E/flutter ( 7462): #2      KeyFrameNumeric.apply (package:flare_dart/animation/keyframe.dart:138:5)
E/flutter ( 7462): #3      PropertyAnimation.apply (package:flare_dart/animation/actor_animation.dart:199:21)
E/flutter ( 7462): #4      ComponentAnimation.apply (package:flare_dart/animation/actor_animation.dart:248:27)
E/flutter ( 7462): #5      ActorAnimation.apply (package:flare_dart/animation/actor_animation.dart:403:26)
E/flutter ( 7462): #6      FlareActorRenderObject._updateAnimation (package:flare_flutter/flare_actor.dart:468:19)
E/flutter ( 7462): #7      FlareActorRenderObject.filename=.<anonymous closure> (package:flare_flutter/flare_actor.dart:245:11)
E/flutter ( 7462): #8      _rootRunUnary (dart:async/zone.dart:1132:38)
E/flutter ( 7462): #9      _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter ( 7462): #10     _FutureListener.handleValue (dart:async/future_impl.dart:126:18)
E/flutter ( 7462): #11     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:639:45)
E/flutter ( 7462): #12     Future._propagateToListeners (dart:async/future_impl.dart:668:32)
E/flutter ( 7462): #13     Future._complete (dart:async/future_impl.dart:473:7)
E/flutter ( 7462): #14     _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
E/flutter ( 7462): #15     _AsyncAwaitCompleter.complete.<anonymous closure> (dart:async/runtime/libasync_patch.dart:33:20)
E/flutter ( 7462): #16     _rootRun (dart:async/zone.dart:1120:38)
E/flutter ( 7462): #17     _CustomZone.run (dart:async/zone.dart:1021:19)
E/flutter ( 7462): #18     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
E/flutter ( 7462): #19     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
E/flutter ( 7462): #20     _rootRun (dart:async/zone.dart:1124:13)
E/flutter ( 7462): #21     _CustomZone.run (dart:async/zone.dart:1021:19)
E/flutter ( 7462): #22     _CustomZone.runGuarded (dart:async/zone.dart:923:7)
E/flutter ( 7462): #23     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
E/flutter ( 7462): #24     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
E/flutter ( 7462): #25     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
E/flutter ( 7462):

我非常确定我没有打错文件名和动画名称。

下面是我的 main.dart 文件：

import 'package:flutter/material.dart';
import "package:flare_flutter/flare_actor.dart";

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'The Boring Star',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return new FlareActor("animations/status_success.flr",
        alignment: Alignment.center,
        fit: BoxFit.contain,
        animation: "success_arrow");
  }
}

-----编辑------ 我不知道为什么，但是下面的动画效果很好 https://www.2dimensions.com/a/pollux/files/flare/smiley-switch

因此，得出的结论是我的动画存在一些问题： https://www.2dimensions.com/a/innocent/files/flare/status_success

谁能帮我解决这个问题？

【问题讨论】：

你现在有最新版本的flare_flutter吗^1.3.0我遇到了问题
是的，我用的是最新的flare_flutter 1.3.0，你是怎么解决的？
我有一个 NoSuchMethodError 并且可以通过更新版本来修复它，但如果你已经有这个可能是另一个问题
@FoxyError --- 2dimensions.com/a/pollux/files/flare/smiley-switch --- 正在工作。所以，只有我的动画有一些问题.. :(
你是不是也是这样导出的

标签： flutter flutter-animation flare

【解决方案1】：

动画的名字不是success_arrow，只是success

FlareActor("animations/status_success.flr",
        alignment: Alignment.center,
        fit: BoxFit.contain,
        animation: "success");

【讨论】：

【解决方案2】：

将动画的名称更改为与您的 Web 项目中的动画相同的名称。

【讨论】：

【解决方案3】：

如果动画名称未更改，则animation: 将是"Untitled"

【讨论】：