【问题标题】:jsPDF problems, aligning and elements and with .text()jsPDF问题,对齐和元素以及.text()
【发布时间】:2017-01-02 03:28:24
【问题描述】:

我正在使用 jsPDF 将一些 HTML 代码打印为 pdf。

这是我的功能:

function demoFromHTML() {
    var pdf = new jsPDF('p', 'pt', 'A4');
    // source can be HTML-formatted string, or a reference
    // to an actual DOM element from which the text will be scraped.
    //source = $('.conteudo_simulacao_final')[0];
    pdf.setFontSize(40);
    pdf.text(250, 220, 'World test!');

    source = '<h1><img src="jsPDF/header.jpg" alt="header" style="width:595.28px; top:0; left: 0;" ></h1>';
    source += '<div style="width:400px; >'
    source += '<div style="float: left;"><img src="jsPDF/cartao_img.png" style="width:300px;" alt="cartao"></div>'
    source += '<div style="float: left;"> TESTSASSAE</div>';
    source += '</div>':
    source += '<img src="jsPDF/footer.png" alt="footer" style="width:595.28; bot: 0;" ></h1>';

    // we support special element handlers. Register them with jQuery-style 
    // ID selector for either ID or node name. ("#iAmID", "div", "span" etc.)
    // There is no support for any other type of selectors 
    // (class, of compound) at this time.
    specialElementHandlers = {
        // element with id of "bypass" - jQuery style selector
        '#bypassme': function (element, renderer) {
            // true = "handled elsewhere, bypass text extraction"
            return true
        }
    };
    margins = {
        top: 0,
        bot: 0,
        left: 0,
        width: 522
    }

    // all coords and widths are in jsPDF instance's declared units
    // 'inches' in this case
    pdf.fromHTML(
    source, // HTML string or DOM elem ref.
    margins.left, // x coord
    margins.top, { // y coord
        'width': margins.width, // max width of content on PDF
        'elementHandlers': specialElementHandlers
    },

    function (dispose) {
        // dispose: object with X, Y of the last line add to the PDF 
        //          this allow the insertion of new lines after html
        pdf.save('Test.pdf');
    }, margins);
}

我可以创建一个 pdf,我的问题是: 我无法并排打印两个 div。我认为 jsPDF 无法读取样式,有什么办法可以解决这个问题?

我的另一个问题是当我这样做时:'pdf.text(250, 220, 'World test!');'文字在我的图片后面,有什么办法把它放在前面?

感谢你们的时间。

【问题讨论】:

    标签: javascript jspdf


    【解决方案1】:

    对于您的 CSS 未呈现的问题,我认为这应该会有所帮助:Exporting PDF with jspdf not rendering CSS

    回答者建议使用 Html2Canvas。然后你可以添加 HTML2Canvas JS,然后使用 pdf.addHTML() 而不是 pdf.fromHTML()。

    您的图像显示在文本上的原因是因为您没有告诉 jsPDF 在页面下方打印。

    尝试执行以下操作。最初设置你的边距,在指定的边距处写你的文本,然后增加边距,这样当你打印你的 html 时,它会低于“世界测试!”文本。

            function demoFromHTML() {
        var pdf = new jsPDF('p', 'pt', 'A4');
        // source can be HTML-formatted string, or a reference
        // to an actual DOM element from which the text will be scraped.
        //source = $('.conteudo_simulacao_final')[0];
        pdf.setFontSize(40);
        var margins = {
                    top: 75,
                    bottom: 60,
                    left: 30,
                    width: 530
                };
        pdf.text(margins.left, margins.top, 'World test!');
        margins.top = margins.top + pdf.internal.getFontSize();
    
        source = '<h1><img src="jsPDF/header.jpg" alt="header" style="width:595.28px; top:0; left: 0;" ></h1>';
        source = '<html><body><h1><img src="jsPDF/header.jpg" alt="header" style="width:595.28px; top:0; left: 0;" ></h1>';
        source += '<div style="width:400px; >'
        source += '<div style="float: left;"><img src="jsPDF/cartao_img.png" style="width:300px;" alt="cartao"></div>'
        source += '<div style="float: left;"> TESTSASSAE</div>';
        source += '</div>':
        source += '<img src="jsPDF/footer.png" alt="footer" style="width:595.28; bot: 0;" ></h1>';
    
        // we support special element handlers. Register them with jQuery-style 
        // ID selector for either ID or node name. ("#iAmID", "div", "span" etc.)
        // There is no support for any other type of selectors 
        // (class, of compound) at this time.
        specialElementHandlers = {
            // element with id of "bypass" - jQuery style selector
            '#bypassme': function (element, renderer) {
                // true = "handled elsewhere, bypass text extraction"
                return true
            }
        };
        
    
        // all coords and widths are in jsPDF instance's declared units
        // 'inches' in this case
        pdf.fromHTML(
        source, // HTML string or DOM elem ref.
        margins.left, // x coord
        margins.top, { // y coord
            'width': margins.width, // max width of content on PDF
            'elementHandlers': specialElementHandlers
        },
    
        function (dispose) {
            // dispose: object with X, Y of the last line add to the PDF 
            //          this allow the insertion of new lines after html
            pdf.save('Test.pdf');
        }, margins);
    }

    【讨论】:

    • 我明天试试画布。关于文本我猜我自己解释错了。我希望文本位于图像顶部,例如在 css: img: z-index :0 text: z-index: 1 有什么办法吗?谢谢
    • 只是一个更新,尝试了画布并且它工作了;)它打印了所有 css 的页面。刚刚遇到一个小问题,我打印的项目的标题出现了黑色。实际上哪里是白色的,知道为什么吗?
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