fabricJS 版本 2.2.3
测试jsFiddle
我正在尝试使用 LabeledRect 子类，但我的问题是，每当我尝试从 JSON 加载它时，它都不会呈现，并且在控制台中也没有出现错误。请参阅下面的小提琴。
我怎样才能正确渲染它？我认为我的问题出在 fromObject func 但我不知道在哪里。
/**
* fabric.js template for bug reports
*
* Please update the name of the jsfiddle (see Fiddle Options).
* This templates uses latest dev verison of fabric.js (https://rawgithub.com/kangax/fabric.js/master/dist/fabric.js).
*/
// initialize fabric canvas and assign to global windows object for debug
var canvas = window._canvas = new fabric.Canvas('c');
// ADD YOUR CODE HERE
var json = '{"version":"2.2.3","objects":[{"type":"labeledRect","version":"2.2.3","originX":"left","originY":"top","left":0,"top":0,"width":100,"height":50,"fill":"#faa","stroke":null,"strokeWidth":1,"strokeDashArray":null,"strokeLineCap":"butt","strokeLineJoin":"miter","strokeMiterLimit":10,"scaleX":1,"scaleY":1,"angle":0,"flipX":false,"flipY":false,"opacity":1,"shadow":null,"visible":true,"clipTo":null,"backgroundColor":"","fillRule":"nonzero","paintFirst":"fill","globalCompositeOperation":"source-over","transformMatrix":null,"skewX":0,"skewY":0,"rx":0,"ry":0,"label":"1"}]}';
fabric.LabeledRect = fabric.util.createClass(fabric.Rect, {
type: 'labeledRect',
initialize: function(options) …fabricjs ×1