【解决】jsPDF 之长图片生成 PDF

//当内容未超过 pdf 一页显示的范围，无需分页

if(leftHeight < pageHeight) {

pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth,imgHeight);

} else {

while(leftHeight > 0) {

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pdf.addImage(pageData, 'JPEG', 0, position,imgWidth, imgHeight)

leftHeight -= pageHeight;

position -= 841.89;

//避免添加空白页

if(leftHeight > 0) {

//注②

pdf.addPage();

}

}

}

pdf.save('name_hos.pdf');

}

});

})

注①new jsPDF(orientation, unit, format) → {jsPDF}

| Name | Description |

| --- | --- |

| orientation | One of “portrait” or “landscape” (or shortcuts “p” (Default), “l”) |

| unit | Measurement unit to be used when coordinates are specified. One of “pt” (points), “mm” (Default), “cm”, “in” |

| format | One of ‘pageFormats’ as shown below, default: a4 |

.

注②addPage() → {jsPDF}

/**

• Adds (and transfers the focus to) new page to the PDF document.

• @function

• @returns {jsPDF}

• @methodOf jsPDF#

• @name addPage

*/

API.addPage = function() {

_addPage.apply(this, arguments);

return this;

};

注③各种型号纸张大小

pageFormats = { // Size in pt of various paper formats

'a0': [2383.94, 3370.39],

'a1': [1683.78, 2383.94],

'a2': [1190.55, 1683.78],

'a3': [841.89, 1190.55],

'a4': [595.28, 841.89],

'a5': [419.53, 595.28],

'a6': [297.64, 419.53],

'a7': [209.76, 297.64],

'a8': [147.40, 209.76],

'a9': [104.88, 147.40],

'a10': [73.70, 104.88],

'b0': [2834.65, 4008.19],

'b1': [2004.09, 2834.65],

'b2': [1417.32, 2004.09],

'b3': [1000.63, 1417.32],

'b4': [708.66, 1000.63],

'b5': [498.90, 708.66],

'b6': [354.33, 498.90],

'b7': [249.45, 354.33],

'b8': [175.75, 249.45],

'b9': [124.72, 175.75],

'b10': [87.87, 124.72],

'c0': [2599.37, 3676.54],

'c1': [1836.85, 2599.37],

'c2': [1298.27, 1836.85],

'c3': [918.43, 1298.27],

'c4': [649.13, 918.43],

'c5': [459.21, 649.13],

'c6': [323.15, 459.21],

'c7': [229.61, 323.15],

'c8': [161.57, 229.61],

'c9': [113.39, 161.57],

'c10': [79.37, 113.39],