Animation 曲线化剂量'；t型曲线

转发动画控制器总是导致控制器值的线性变化。它不依赖于曲线动画的曲线参数。 更改曲线类型也无济于事。此外，我尝试将持续时间更改为40秒，但仍然是线性输出。曲线参数不会改变任何东西，对于所有不同的曲线类型，它仍然是相同的输出

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp>
    with SingleTickerProviderStateMixin {
  AnimationController animationController;

  @override
  void initState() {
    super.initState();
    animationController =
        AnimationController(vsync: this, duration: Duration(milliseconds: 300));
    CurvedAnimation(parent: animationController, curve: Curves.bounceIn)
        .addListener(() {
      print(animationController.value);
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: GestureDetector(
            onTap: () {
              animationController.forward(from: 0.0);
            },
            child: Center(
              child: Container(
                child: Text("forward from 0.0"),
              ),
            )),
      ),
    );
  }
}

---

您需要打印

曲线动画的值

  @override
  void initState() {
    super.initState();
    animationController =
        AnimationController(vsync: this, duration: Duration(milliseconds: 300));
    CurvedAnimation ca =
        CurvedAnimation(parent: animationController, curve: Curves.bounceIn);
    ca.addListener(() => print(ca.value));
  }

---

您正在打印

AnimationController.value

而不是

CurvedAnimation.value

@pskink如果您是对的，请指定：“CurvedAnimation的值”。AnimationController也是Animation感谢您的澄清。

  @override
  void initState() {
    super.initState();
    animationController =
        AnimationController(vsync: this, duration: Duration(milliseconds: 300));
    CurvedAnimation ca =
        CurvedAnimation(parent: animationController, curve: Curves.bounceIn);
    ca.addListener(() => print(ca.value));
  }