HTML5 Canvas 动画教程

要使用 Konva 进行属性动画，我们可以实例化一个 Konva.Tween 对象，然后通过调用 play() 来开始动画。Shape、Group、Layer 或 Stage 的任何数值属性都可以进行过渡，例如 x、y、rotation、width、height、radius、strokeWidth、opacity、scaleX、offsetX 等等。

有关属性和方法的完整列表，请查看 Konva.Tween 文档。

Konva 动画演示view raw

<!DOCTYPE html>
<html>
  <head>
    <script src="https://unpkg.com/konva@9.3.18/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva Linear Easing Demo</title>
    <style>
      body {
        margin: 0;
        padding: 0;
        overflow: hidden;
        background-color: #f0f0f0;
      }
    </style>
  </head>
  <body>
    <div id="container"></div>
    <script>
      var width = window.innerWidth;
      var height = window.innerHeight;

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

      var layer = new Konva.Layer();

      var rect = new Konva.Rect({
        x: 50,
        y: 20,
        width: 100,
        height: 50,
        fill: 'green',
        stroke: 'black',
        strokeWidth: 2,
        opacity: 0.2,
      });

      layer.add(rect);
      stage.add(layer);

      // the tween has to be created after the node has been added to the layer
      var tween = new Konva.Tween({
        node: rect,
        duration: 1,
        x: 140,
        y: 90,
        fill: 'red',
        rotation: Math.PI * 2,
        opacity: 1,
        strokeWidth: 6,
        scaleX: 1.5,
      });

      // start tween after 2 seconds
      setTimeout(function () {
        tween.play();
      }, 2000);
    </script>
  </body>
</html>