更多缓动函数教程

本教程演示了 Konva 提供的所有缓动函数集，包括：

• 线性
• 缓入
• 缓出
• 缓入缓出
• 回弹缓入
• 回弹缓出
• 回弹缓入缓出
• 弹性缓入
• 弹性缓出
• 弹性缓入缓出
• 反弹缓入
• 反弹缓出
• 反弹缓入缓出
• 强缓入
• 强缓出
• 强缓入缓出

有关所有可用的缓动，请参见 缓动文档。

说明：点击“播放”来使用不同的缓动函数过渡所有文本节点。

Vanilla

import Konva from 'konva';

const width = window.innerWidth;
const height = window.innerHeight;

const stage = new Konva.Stage({
  container: 'container',
  width: width,
  height: height,
});

const layer = new Konva.Layer();

const easings = [
  'Linear',
  'EaseIn',
  'EaseOut',
  'EaseInOut',
  'BackEaseIn',
  'BackEaseOut',
  'BackEaseInOut',
  'ElasticEaseIn',
  'ElasticEaseOut',
  'ElasticEaseInOut',
  'BounceEaseIn',
  'BounceEaseOut',
  'BounceEaseInOut',
  'StrongEaseIn',
  'StrongEaseOut',
  'StrongEaseInOut',
];

const tweens = [];

easings.forEach((easing, i) => {
  const text = new Konva.Text({
    x: 50,
    y: 30 + i * 25,
    text: easing,
    fontSize: 16,
    fontFamily: 'Calibri',
    fill: 'black',
  });
  layer.add(text);

  tweens.push(
    new Konva.Tween({
      node: text,
      duration: 2,
      x: width - 200,
      easing: Konva.Easings[easing],
    })
  );
});

stage.add(layer);

// 创建按钮
const button = document.createElement('button');
button.textContent = '播放';
button.style.position = 'absolute';
button.style.top = '0px';
button.style.left = '0px';
button.addEventListener('click', () => {
  tweens.forEach((tween) => {
    tween.reset();
    tween.play();
  });
});
document.body.appendChild(button);

Open Sandbox

React

import { Stage, Layer, Text } from 'react-konva';
import { useEffect, useRef } from 'react';

const App = () => {
  const tweensRef = useRef([]);
  const textsRef = useRef([]);

  const easings = [
    'Linear',
    'EaseIn',
    'EaseOut',
    'EaseInOut',
    'BackEaseIn',
    'BackEaseOut',
    'BackEaseInOut',
    'ElasticEaseIn',
    'ElasticEaseOut',
    'ElasticEaseInOut',
    'BounceEaseIn',
    'BounceEaseOut',
    'BounceEaseInOut',
    'StrongEaseIn',
    'StrongEaseOut',
    'StrongEaseInOut',
  ];

  useEffect(() => {
    tweensRef.current = textsRef.current.map((text, i) => {
      return new Konva.Tween({
        node: text,
        duration: 2,
        x: window.innerWidth - 200,
        easing: Konva.Easings[easings[i]],
      });
    });
  }, []);

  const handlePlay = () => {
    tweensRef.current.forEach((tween) => {
      tween.reset();
      tween.play();
    });
  };

  return (
    <>
      <button onClick={handlePlay}>播放</button>
      <Stage width={window.innerWidth} height={window.innerHeight}>
        <Layer>
          {easings.map((easing, i) => (
            <Text
              key={i}
              ref={(node) => (textsRef.current[i] = node)}
              x={50}
              y={30 + i * 25}
              text={easing}
              fontSize={16}
              fontFamily="Calibri"
              fill="black"
            />
          ))}
        </Layer>
      </Stage>
    </>
  );
};

export default App;

Open Sandbox

Vue

<template>
  <div>
    <button @click="handlePlay">播放</button>
    <v-stage :config="stageSize">
      <v-layer>
        <v-text
          v-for="(easing, i) in easings"
          :key="i"
          :config="getTextConfig(easing, i)"
          :ref="el => textRefs[i] = el"
        />
      </v-layer>
    </v-stage>
  </div>
</template>

<script setup>
import { ref, onMounted } from 'vue';
import Konva from 'konva';

const stageSize = {
  width: window.innerWidth,
  height: window.innerHeight
};

const easings = [
  'Linear',
  'EaseIn',
  'EaseOut',
  'EaseInOut',
  'BackEaseIn',
  'BackEaseOut',
  'BackEaseInOut',
  'ElasticEaseIn',
  'ElasticEaseOut',
  'ElasticEaseInOut',
  'BounceEaseIn',
  'BounceEaseOut',
  'BounceEaseInOut',
  'StrongEaseIn',
  'StrongEaseOut',
  'StrongEaseInOut',
];

const textRefs = ref([]);
let tweens = [];

const getTextConfig = (easing, i) => ({
  x: 50,
  y: 30 + i * 25,
  text: easing,
  fontSize: 16,
  fontFamily: 'Calibri',
  fill: 'black'
});

onMounted(() => {
  tweens = textRefs.value.map((ref, i) => {
    return new Konva.Tween({
      node: ref.getNode(),
      duration: 2,
      x: window.innerWidth - 200,
      easing: Konva.Easings[easings[i]]
    });
  });
});

const handlePlay = () => {
  tweens.forEach(tween => {
    tween.reset();
    tween.play();
  });
};
</script>

Open Sandbox