我正在创建SVG形状并将其导出到数据库。 jsfiddle就是这里 - http://jsfiddle.net/rafi_ccj/MASeK/1/
代码如下。
HTML部分:
<button id="make_svg">toSVG</button>
<div id="canvas-wrapper">
<canvas id="canvas" width="400px" height="200px"></canvas>
</div>
Javascript部分:
var canvas = new fabric.Canvas('canvas');
canvas.add(new fabric.Rect({
left: 100,
top: 100,
angle: 0,
fill: 'rgba(23,23,125,0.5)',
strokeWidth: 0.1,
stroke: '#FF0000',
width: 200,
height: 200,
opacity: 1
}));
canvas.add(new fabric.Circle({
left: 100,
top: 100,
fill: 'rgba(45, 255, 34, 0.5)',
strokeWidth: 0.1,
stroke: '#FF0000',
radius: 100,
opacity: 1
}));
$("#make_svg").click(function () {
canvas_data = canvas.toSVG();
console.log(canvas_data);
});
然后我将svg导入到画布中,但它与我创建的不一样。 jsfiddle在这里 - http://jsfiddle.net/rafi_ccj/2vtz2/
,代码在--- ---
html部分
<div id="canvas-wrapper">
<canvas id="canvas" width="900px" height="800px"></canvas>
</div>
javascript部分在这里 -
var canvas = new fabric.Canvas('canvas');
var canvas_data = '<?xml version="1.0" standalone="no" ?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="400" height="200" xml:space="preserve"><desc>Created with Fabric.js 1.1.8</desc><defs></defs><rect x="-100" y="-100" rx="0" ry="0" width="200" height="200" style="stroke: #FF0000; stroke-width: 0.1; stroke-dasharray: ; fill: rgba(23,23,125,0.5); opacity: 1;" transform="translate(100 100)"/><circle cx="0" cy="0" r="100" style="stroke: #FF0000; stroke-width: 0.1; stroke-dasharray: ; fill: rgba(45, 255, 34, 0.5); opacity: 1;" transform="translate(100 100)"/></svg> ';
fabric.loadSVGFromString(canvas_data, function (objects, options) {
var loadedObject = fabric.util.groupSVGElements(objects, options);
loadedObject.set({
left: 400,
top: 200
});
loadedObject.setCoords();
canvas.add(loadedObject);
canvas.calcOffset();
});
我也注意到,如果我使用三角形,导入后它不存在,它就会消失。
有人可以帮我解决这个问题吗?
答案 0 :(得分:3)
我已经通过使所有对象成为一个组元素来解决这个问题,并且在创建具有这些对象的组之后,我已经在设备中使用svg扩展名保存了它,并且在数据库中也保存了json格式。代码如下 -
var group = new fabric.Group([],{
left: 200,
top: 200
});
var canvas_item = canvas.item(0), x = 0;
while (canvas_item != undefined) {
group.addWithUpdate(canvas_item);
x += 1;
canvas_item = canvas.item(x);
}
canvas.clear();
canvas.add(group);
//then use canvas.toDatalessJSON(); and save it to database. while importing this data //use following codes
var canvas_data = JSON.stringify(canvas.toDatalessJSON());
canvasJSONdata = JSON.stringify(canvas.toDatalessJSON());
var stringifiedCanvasJSONdata = JSON.parse(canvasJSONdata,'');
var base_64 = canvas.toDataURL('png');
现在它完美无缺!虽然我遇到了很多问题,但我学到了很多东西,我很享受!希望这个解决方案能在某一天帮助某人。