fangBlood 2018-10-12 02:48 采纳率: 77.8%
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使用html2canvas一直报错，有用过的大神指教一下吗

一直报错onrendered option is deprecated, html2canvas returns a Promise with the canvas as the value!如下图
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  • fangBlood 2018-10-12 03:43
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    js代码

      $("#btn_upload4").click(function () {
         var  filename = 1+ "_fansImages.pdf";
             // 将 id 为 Modal5 的 div 渲染成 canvas
            html2canvas(document.getElementById("Modal5"), {

                // 渲染完成时调用，获得 canvas
                onrendered: function(canvas) {

                    // 从 canvas 提取图片数据
                    var imgData = canvas.toDataURL('image/jpeg');

                    var canWidth = canvas.width;
                    var canHeight = canvas.height;
                    var arrDPI = js_getDPI();//获取显示器DPI
                    var dpiX = 96;
                    var dpiY = 96;
                    if(arrDPI.length>0){
                        dpiX = arrDPI[0];
                        dpiY = arrDPI[1];
                    }

                    // var doc = new jsPDF("p", "mm", "a4");
                    var doc = new jsPDF('', 'in', [(canWidth+10)/dpiX,(canHeight+10)/dpiY]);//设置PDF宽高为要显示的元素的宽高，将像素转化为英寸  
                    // doc.addImage(imgData, 'JPEG', 0, 0,210,297);
                    doc.addImage(imgData, 'JPEG', 0, 0,0,0);

                    doc.save(filename);
                },
               background : "#f7f7f7"    //设置PDF背景色（默认透明，实际显示为黑色）
            });  
     })

    html代码

     <div class="modal fade" id="Modal5" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" style="z-index: 1050;">
                    <div class="modal-dialog modal-lg" >
                        <div class="modal-content" style="width:1000px;margin-left:-5%" >
                            <div class="modal-header" style="height:60px">
                                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                                <h4 class="modal-title" id="myModalLabel" style="float:left ;">正太分析图</h4>
                                <button type="button" class="btn btn-default" style="background-color:#337ab7;color:#fff;margin-top:3px;float:right" id="btn_upload4" >打印正太图</button>
                            </div>
                            <!--startprint-->
                            <div class="modal-body">
                                <div class="ibox" >
                                    <div style="width:21%;height:40%; float:left; border:1px solid;margin-top:30px" >
                                        <p style="text-align: center;">Process Data</p></br>
                                            <div class="col-md-6">LSL:</div>
                                            <div class="col-md-6"><span id="lsl"></span></div>
                                            <div class="col-md-6">Target:</div>
                                            <div class="col-md-6"><span id="Target"></span></div>
                                            <div class="col-md-6">USL:</div>
                                            <div class="col-md-6"><span id="USL"></span></div>
                                            <div class="col-md-6">SampleM:</div>
                                            <div class="col-md-6"><span id="SM"></span></div>
                                            <div class="col-md-6">SampleN:</div>
                                            <div class="col-md-6"><span id="SampleN"></span></div>
                                            <div class="col-md-6">Within:</div>
                                            <div class="col-md-6"><span id="Within"></span></div>
                                            <div class="col-md-6">Overall:</div>
                                            <div class="col-md-6"><span id="Overall"></span></div>
                                    </div>
                                    <!-- echart图 -->
                                    <div id="main" style="width: 500px;height:300px;background-color: #ffffff;margin: 0 auto"></div>
                                    <div style="width: 22%;height:20% ; float:right;margin-top:-31%;">
                                        <div style="border:1px solid;width:150px;height:50px">
                                            <p>————With in</p>
                                            <p>—— ——Over all</p>
                                        </div>
                                        <div style="border:1px solid;width:200px;height:150px;margin-top:5px">
                                            <p style="text-align: center;">Potential(Within)Capabilitys</p>
                                            <div class="col-md-6">Cp:</div>
                                            <div class="col-md-6"><span id="Cp"></span></div>
                                            <div class="col-md-6">CPL:</div>
                                            <div class="col-md-6"><span id="CPL"></span></div>
                                            <div class="col-md-6">CPU:</div>
                                            <div class="col-md-6"><span id="CPU"></span></div>
                                            <div class="col-md-6">CPK:</div>
                                            <div class="col-md-6"><span id="CPK"></span></div>
                                            <div class="col-md-6">CCPK:</div>
                                            <div class="col-md-6"><span id="CCPK"></span></div>

                                        </div>
                                        <div style="border:1px solid;width:200px;height:150px;">
                                            <p style="text-align: center;">Overall Capability</p>
                                            <div class="col-md-6">Pp:</div>
                                            <div class="col-md-6"><span id="Pp"></span></div>
                                            <div class="col-md-6">PPL:</div>
                                            <div class="col-md-6"><span id="PPL"></span></div>
                                            <div class="col-md-6">PPU:</div>
                                            <div class="col-md-6"><span id="PPU"></span></div>
                                            <div class="col-md-6">PPK:</div>
                                            <div class="col-md-6"><span id="PPK"></span></div>
                                            <div class="col-md-6">CPM:</div>
                                            <div class="col-md-6"><span id="CPM"></span></div>

                                        </div>
                                    </div>
                                    <div class="content" style="width: 100%;height:20%;margin-top: 8%;">
                                        <div id="right" style="border:1px solid;width:225px;height:130px;margin-top:5px">
                                            <p style="text-align: center;">O bserv ed Performnance</p>
                                            <div class="col-md-6">PPM &lt LSL:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmlsl" ></span></div>
                                            <div class="col-md-6">PPM &gt USL:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmtotal" ></span></div>
                                            <div class="col-md-6">PPM Total:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmusl" ></span></div>
                                        </div>      
                                        <div  id="mid" style="border:1px solid;width:225px;height:130px;margin-top:5px;">
                                            <p style="text-align: center;">Exp.Within Performance</p>
                                            <div class="col-md-6">PPM &lt LSL:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmlsls" ></span></div>
                                            <div class="col-md-6">PPM &gt USL:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmtotals" ></span></div>
                                            <div class="col-md-6">PPM Total:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmusls" ></span></div>
                                        </div>
                                        <div id="left" style="border:1px solid;width:225px;height:130px;margin-top:5px">
                                            <p style="text-align: center;">Exp.Overall Performance</p>
                                            <div class="col-md-6">PPM &lt LSL:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmlsl1" ></span></div>
                                            <div class="col-md-6">PPM &gt USL:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmtotal1" ></span></div>
                                            <div class="col-md-6">PPM Total:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="ppmusl1" ></span></div>
                                        </div>
                                        <div id="passTital" style="border:1px solid;width:165px;height:130px;margin-left:5px;margin-top:5px;float:left">
                                            <p style="text-align: center;">Percent Of Pass</p >
                                            <div class="col-md-6">PASS:</div>
                                            <div class="col-md-6" style="text-align:center"><span id="pass" ></span></div>

                                        </div>          
                                    </div>  
                                    </div>
                                </div>
                            </div>
                            <!--endprint--> 
                            <div class="modal-footer">
                                <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
                            </div>
                        </div><!-- /.modal-content -->
                    </div><!-- /.modal -->
                </div>
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