拖拽图片

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图片也支持拖拽，我们只需要设置图片的 draggable 属性为 true, 或者使用 draggable() 方法设置。

draggable() 方法会自动适配桌面端和移动端。

Konva Drag and Drop an Image Demoview raw
<!DOCTYPE html>
<html>
  <head>
    <script src="https://unpkg.com/[email protected]/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva Drag and Drop an Image 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;

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

        var layer = new Konva.Layer();
        // darth vader
        var darthVaderImg = new Konva.Image({
          image: imageObj,
          x: stage.width() / 2 - 200 / 2,
          y: stage.height() / 2 - 137 / 2,
          width: 200,
          height: 137,
          draggable: true
        });

        // add cursor styling
        darthVaderImg.on('mouseover', function() {
          document.body.style.cursor = 'pointer';
        });
        darthVaderImg.on('mouseout', function() {
          document.body.style.cursor = 'default';
        });

        layer.add(darthVaderImg);
        stage.add(layer);
      }
      var imageObj = new Image();
      imageObj.onload = function() {
        drawImage(this);
      };
      imageObj.src = '/assets/darth-vader.jpg';
    </script>
  </body>
</html>