带有html2canvas,react和jsPDF的多页pdf

时间:2018-10-05 08:53:42

标签: reactjs jspdf html2canvas

我正在尝试使用html2canvas和jsPDF在React应用程序中创建多页pdf。我从this问题开始,提供了凯尔·贝克(Kyle Baker)提供的解决方案,但是该解决方案并不完善,因为它不能很好地处理页边距,或者当您不想拆分某些内容时无法启动新页面。有谁能提供有关如何增加/控制页边距,缩小/缩放图像以及为组件上的新页面拆分的见解?这是原始的解决方案:

function makePDF() {

    var quotes = document.getElementById('container-fluid');

    html2canvas(quotes, {
        onrendered: function(canvas) {

        //! MAKE YOUR PDF
        var pdf = new jsPDF('p', 'pt', 'letter');

        for (var i = 0; i <= quotes.clientHeight/980; i++) {
            //! This is all just html2canvas stuff
            var srcImg  = canvas;
            var sX      = 0;
            var sY      = 980*i; // start 980 pixels down for every new page
            var sWidth  = 900;
            var sHeight = 980;
            var dX      = 0;
            var dY      = 0;
            var dWidth  = 900;
            var dHeight = 980;

            window.onePageCanvas = document.createElement("canvas");
            onePageCanvas.setAttribute('width', 900);
            onePageCanvas.setAttribute('height', 980);
            var ctx = onePageCanvas.getContext('2d');
            // details on this usage of this function: 
            // https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Using_images#Slicing
            ctx.drawImage(srcImg,sX,sY,sWidth,sHeight,dX,dY,dWidth,dHeight);

            // document.body.appendChild(canvas);
            var canvasDataURL = onePageCanvas.toDataURL("image/png", 1.0);

            var width         = onePageCanvas.width;
            var height        = onePageCanvas.clientHeight;

            //! If we're on anything other than the first page,
            // add another page
            if (i > 0) {
                pdf.addPage(612, 791); //8.5" x 11" in pts (in*72)
            }
            //! now we declare that we're working on that page
            pdf.setPage(i+1);
            //! now we add content to that page!
            pdf.addImage(canvasDataURL, 'PNG', 20, 40, (width*.62), (height*.62));

        }
        //! after the for loop is finished running, we save the pdf.
        pdf.save('Test.pdf');
    }
  });
}

非常感谢@KyleBaker提供此代码!

0 个答案:

没有答案