打開由JSPDF生成PDF的錯誤圖像畫布

Question

我正在使用下面的JavaScript將頁面的畫布拍攝並將其轉換爲PDF，但是當它保存該文件時...我無法打開PDF中的文件I出現以下錯誤「出現錯誤處理頁面。有一個問題閱讀本文檔（110）」我可以打開相同的文件瀏覽器中，但不是我的電腦上

function exportPDF() { 
    var pdf = new jsPDF('l','px'), 
    source = $('body')[0]; 
    var canvasToImage = function(canvas){ 
    var img = new Image(); 
    var dataURL = canvas.toDataURL('image/png'); 
    img.src = dataURL; 
    return img; 
}; 
var canvasShiftImage = function(oldCanvas,shiftAmt){ 
    shiftAmt = parseInt(shiftAmt) || 0; 
    if(!shiftAmt){ return oldCanvas; } 

    var newCanvas = document.createElement('canvas'); 
    newCanvas.height = oldCanvas.height - shiftAmt; 
    newCanvas.width = oldCanvas.width; 
    var ctx = newCanvas.getContext('2d'); 

    var img = canvasToImage(oldCanvas); 
    ctx.drawImage(img,0, shiftAmt, img.width, img.height, 0, 0, img.width, img.height); 

    return newCanvas; 
}; 


var canvasToImageSuccess = function(canvas){ 
    var pdf = new jsPDF('l','px'), 
     pdfInternals = pdf.internal, 
     pdfPageSize = pdfInternals.pageSize, 
     pdfScaleFactor = pdfInternals.scaleFactor, 
     pdfPageWidth = pdfPageSize.width, 
     pdfPageHeight = pdfPageSize.height, 
     totalPdfHeight = 0, 
     htmlPageHeight = canvas.height, 
     htmlScaleFactor = canvas.width/(pdfPageWidth * pdfScaleFactor), 
     safetyNet = 0; 

    while(totalPdfHeight < htmlPageHeight && safetyNet < 15){ 
     var newCanvas = canvasShiftImage(canvas, totalPdfHeight); 
     pdf.addImage(newCanvas, 'png', 0, 0, pdfPageWidth, 0, null, 'NONE'); 

     totalPdfHeight += (pdfPageHeight * pdfScaleFactor * htmlScaleFactor); 

     if(totalPdfHeight < htmlPageHeight){ 
      pdf.addPage(); 
     } 
     safetyNet++; 
    } 

    pdf.save(address.innerHTML + 'test.PDF'); 
}; 

html2canvas(source, { 
    onrendered: function(canvas){ 
     canvasToImageSuccess(canvas); 
    } 
}); 

Answer 1

請遵循答案下面的git鏈接

https://github.com/MrRio/jsPDF/issues/862