javascript 不能在 Fabric.js 中使用 getActiveObject()
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Cannot use getActiveObject() in Fabric.js
提问by Robin Riegman
I want to check the image quality of the selected image on canvas.
我想检查画布上所选图像的图像质量。
My following code:
我的以下代码：
var canvas = $(".canvas-container").children('canvas').get(0);
//console.log(canvas.getActiveObject().get('type'));
console.log(canvas);
The getActiveObject() log gives an error: undefined is not a function.
getActiveObject() 日志给出错误：未定义不是函数。
The other log returns:
另一个日志返回：
<canvas class="lower-canvas" width="850" height="230" style="position: absolute; width: 850px; height: 230px; left: 0px; top: 0px; -webkit-user-select: none;"></canvas>
The canvas is created in another js file:
画布是在另一个 js 文件中创建的：
//create fabric stage
var canvas = $productStage.children('canvas').get(0);
stage = new fabric.Canvas(canvas, {
selection: false,
hoverCursor: 'pointer',
rotationCursor: 'default',
controlsAboveOverlay: true,
centeredScaling: true
});
What must I change so I can use so I can use canvas.getActiveObject()?
我必须改变什么才能使用canvas.getActiveObject()？
See http://www.panel-it.eu/shop/straatnaambord-3/#for reference.
请参阅http://www.panel-it.eu/shop/straatnaambord-3/#以供参考。
Thanks in advance.
提前致谢。
回答by taveras
getActiveObject()is a method of a fabric.Canvasobject.
getActiveObject()是一个fabric.Canvas对象的方法。
With the above code, you would use stage.getActiveObject()instead of canvas.getActiveObject()
使用上面的代码，您将使用stage.getActiveObject()而不是canvas.getActiveObject()
