用Konva要将多个形状一起分组，我们可以实例化一个Konva.Group（）对象，然后使用add（）方法向它添加图形。当我们想要一起转换多个形状时，将形状组合在一起真的很方便。如果我们想立刻平移，旋转或缩放多个形状。组也可以添加到其他组来创建更复杂节点树。有关属性和方法的完整列表，请参阅Konva.Group文档.

Konva Groups Demo 点击查看

<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.rawgit.com/konvajs/konva/1.4.0/ konva.min.js"></script>
<meta charset="utf-8">
<title>Konva Groups 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();
/*
* create a group which will be used to combine
* multiple simple shapes.  Transforming the group will
* transform all of the simple shapes together as
* one unit
*/
var group = new Konva.Group({
    x: 120,
    y: 40,
    rotation: 20
});
var colors = ['red', 'orange', 'yellow'];
for(var i = 0; i < 3; i++) {
    var box = new Konva.Rect({
        x: i * 30,
        y: i * 18,
        width: 100,
        height: 50,
        name: colors[i],
        fill: colors[i],
        stroke: 'black',
        strokeWidth: 4
    });
    group.add(box);
}
layer.add(group);
stage.add(layer);
</script>
</body>
</html>

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