使用PdfMake Ionic生成Pdf

如何解决使用PdfMake Ionic生成Pdf

我正在使用Ionic中的pdfMake生成pdf，pdf中有图形。在android中，没有问题的图形行出现在pdf中，但没有出现iOS的图形行。您能不能解决这个问题。

var node = document.getElementById（elementID）; this.alertService.GetMessage（“ PleaseWait”）。subscribe（message => {this.waitMessage = message}）; this.loading = this.loadingCtrl.create（{ 内容：this.waitMessage }）; this.loading.present（）。then（（）=> { domtoimage.toPng（node，{filter：that.filter}） .then（function（dataUrl）{ // var img = new Image（）; // img.src = dataUrl; console.log（“附带PDF图像源”）; var docDefinition = { pageSize：“ A4”， pageMargins：[80，80，80，60]，

            //pageOrientation: 'landscape',header: {
                margin: 25,columns: [
                    
                    {

                    table: {
                        widths: ['80%','20%'],body: [

                            [{
                                table: {
                                    widths: ['100%'],body: [

                                        [{ text: pageTitle,alignment: 'center',color:'#fff',style: 'subheader' }],]
                                },layout: 'noBorders'

                            },{
                                image: 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMwAAABUCAYAAADOF9jcAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAyZpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw',width: 80,height: 22,alignment: 'right'
                            }],]
                    },fillColor: 'red',layout: 'noBorders',},],content: [
                
                {
                    image: dataUrl,width: 430,height: 620,styles: {
                header: {
                    fontSize: 18,bold: true,color:'#FFFF',subheader: {
                    fontSize: 14,onlyBold:{
                    bold: true
                }
            }
        }

        const options: DocumentViewerOptions = {
          title: 'My PDF'
        }
        
       
         
        // that.pdfObj = pdfMake.createPdf(docDefinition);
        // that.saveAndOpenPdf("DURGA PRASAD","test"+".pdf")

        docDefinition = null;

        console.log("DownloadPdf() triggered")
        that.pdfObj.getBuffer((buffer) => {
            var blob = new Blob([buffer],{ type: 'application/pdf' });
            that.getStoragePath().then(function (url) {
                        // Save the PDF to the data Directory of our App
            that.file.writeFile(url,fileName+'.pdf',blob,{ replace: true }).then(fileEntry => {
                // Open the PDf with the correct OS tools
                that.fileOpener.open(url + fileName+'.pdf','application/pdf');
                blob = null;
                that.pdfObj = null;
                that.loading.dismiss(); 
              })
            });
     
    
          });


    })
    .catch(function (error) {
        console.error('oops,something went wrong!',error);
    });
  });