Flutter -PDF-错误-此小部件创建了20多个页面.这可能是小部件或文档中的问题 [英] Flutter -PDF -- Error - This widget created more than 20 pages. This may be an issue in the widget or the document

问题描述

我正在创建内容丰富的PDF文档.但是，我无法显示PDF并出现错误

I am creating a PDF document that has a large content. However, I am not able to show the PDF and I get the error

此小部件创建了20多个页面.这可能是小部件或文档中的问题."

"This widget created more than 20 pages. This may be an issue in the widget or the document."

我知道文本太大，但是我不知道如何使它起作用

I know the text is too large but I don't know how to make it work

    pdf.addPage(
    pw.MultiPage(
      pageFormat: PdfPageFormat.a4,
      orientation: pw.PageOrientation.portrait,
      crossAxisAlignment: pw.CrossAxisAlignment.start,
      build: (pw.Context context) {
        return <pw.Widget>[
          pw.Wrap(
            children: <pw.Widget>[
              pw.Container(
                width: PdfPageFormat.a4.width,
                child: pw.Row(
                  mainAxisSize: pw.MainAxisSize.min,
                  crossAxisAlignment: pw.CrossAxisAlignment.start,
                  children: <pw.Widget>[
                    pw.Expanded(
                      child: pw.Column(
                        mainAxisSize: pw.MainAxisSize.min,
                        crossAxisAlignment: pw.CrossAxisAlignment.start,
                        children: <pw.Widget>[
                          pw.SizedBox(height: 8.0),
                          for (int i = 0; i < data['employers'].length; i++)
                            pw.Column(
                              mainAxisSize: pw.MainAxisSize.min,
                              crossAxisAlignment: pw.CrossAxisAlignment.start,
                              children: <pw.Widget>[
                                pw.Text(
                                  "${data['employers'][i]['duties']}",
                                  style: pw.TextStyle(
                                    fontSize: 12.0,
                                  ),
                                  softWrap: true,
                                ),
                              ],
                            ),
                        ],
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
        ];
      },
    ),
  );

我需要一些有关如何重组代码的帮助，以便可以显示PDF并将其包装到下一页文本只是一组Lorem Ipsum.

I need some help on how to restructure my code so that I can display the PDF and have it wrap to the next page The text is just a a set of Lorem Ipsum .

感谢您的帮助

推荐答案

此可能是您的问题的解决方案

This might be a solution for your question

我粘贴了链接的代码，以防您无法输入.

I paste the link's code in case you can't enter it.

假设我们有一个列表问题:

pdf.addPage(
  MultiPage(
    build: (Context context) => <Widget>[
      Wrap(
        children: List<Widget>.generate(issues.length, (int index) {
          final issue = issues[index];
          return Container(
            child: Column(
              children: <Widget>[
                Header(
                    text: "Issue n°${issue.id}",
                    textStyle: TextStyle(fontSize: 20)),
                Text("Description :",
                    textAlign: TextAlign.left,
                    style: TextStyle(fontSize: 15)),
              ],
            ),
          );
        }),
      ),
    ],
  ),
);

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