我在我的 flutter 项目中创建了一个 pdf 文档。但复选框不会显示。该行在文本前面有空格，但它是空白的，没有复选框或任何东西。这是在我更新 pdf 包依赖项之后发生的，从那里开始，复选框将不会显示。首先，在我更新包之前，会出现复选框，但是即使我将值设置为true，复选框也没有标记，导出的pdf只有框但没有突出显示，我尝试返回到之前的包版本我更新了它，它至少显示了复选框，但任何其他版本都是相同的，该复选框不再显示。可能是什么原因？
这是我创建 pdf 的课程：
// ignore_for_file: prefer_interpolation_to_compose_strings
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:open_file/open_file.dart';
import 'package:path/path.dart';
import 'package:path_provider/path_provider.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:provider/provider.dart';
import 'package:qvin/utils/labelFormat.dart';
import '../../providers/dvirProvider.dart';
class PdfApi {
static Future<File> generatePDF(
BuildContext context,
String? vehicleNo,
String? remarks,
bool isCondition,
bool isAbove,
bool isAboveDefect,
bool isNoResult) async {
final pdf = pw.Document();
final font = await rootBundle.load("assets/hind.ttf");
final ttf = pw.Font.ttf(font);
DateTime dateToday = DateTime.now();
final provider = Provider.of<DVIRProvider>(context, listen: false);
final datasTruck = provider.checklistTruck;
final datasTrailer = provider.checklistTrailer;
final headers = [
'TITLE',
'STATUS',
];
final dataTruck = datasTruck
.map((e) => [
e.title,
e.isCheck == true ? 'x' : '/',
])
.toList();
final dataTrailer = datasTrailer
.map((e) => [
e.title,
e.isCheck == true ? 'x' : '/',
])
.toList();
pdf.addPage(
pw.MultiPage(
theme: pw.ThemeData(defaultTextStyle: pw.TextStyle(font: ttf)),
build: (context) => <pw.Widget>[
pw.Center(
child: pw.Text(
"Driver's Vehicle Inspection Report",
style: pw.TextStyle(fontSize: 24, fontWeight: pw.FontWeight.bold),
),
),
pw.SizedBox(height: 0.8 * PdfPageFormat.cm),
pw.Center(
child: pw.Text(
"Check ANY Defective Item and Give Details under 'Remarks.'",
style: const pw.TextStyle(
fontSize: 14,
),
),
),
pw.SizedBox(height: 2 * PdfPageFormat.cm),
pw.Column(crossAxisAlignment: pw.CrossAxisAlignment.start, children: [
pw.Text(
"DATE: ${LabelFormat.formatDate(dateToday)}",
style: pw.TextStyle(fontSize: 12, fontWeight: pw.FontWeight.bold),
),
pw.SizedBox(height: 0.5 * PdfPageFormat.cm),
pw.Text(
"TRUCK/TRACTOR NO. $vehicleNo",
style: pw.TextStyle(fontSize: 12, fontWeight: pw.FontWeight.bold),
),
pw.SizedBox(height: 0.5 * PdfPageFormat.cm),
]),
pw.Table.fromTextArray(
data: dataTruck,
headers: headers,
cellHeight: 30,
headerStyle: pw.TextStyle(fontWeight: pw.FontWeight.bold),
cellAlignments: {
0: pw.Alignment.centerLeft,
1: pw.Alignment.center,
},
),
pw.Column(crossAxisAlignment: pw.CrossAxisAlignment.start, children: [
pw.Text(
"TRAILER(S) NO (S). $vehicleNo",
style: pw.TextStyle(fontSize: 12, fontWeight: pw.FontWeight.bold),
),
pw.SizedBox(height: 0.5 * PdfPageFormat.cm),
]),
pw.Table.fromTextArray(
data: dataTrailer,
headers: headers,
cellHeight: 30,
headerStyle: pw.TextStyle(fontWeight: pw.FontWeight.bold),
cellAlignments: {
0: pw.Alignment.centerLeft,
1: pw.Alignment.center,
},
),
pw.SizedBox(height: 0.8 * PdfPageFormat.cm),
pw.Text(
"REMARKS: ${remarks ?? '--'}",
style: pw.TextStyle(
fontSize: 12,
fontWeight: pw.FontWeight.bold,
),
),
pw.SizedBox(height: 0.8 * PdfPageFormat.cm),
if (isNoResult == true)
pw.Column(children: [
pw.Row(children: [
pw.Checkbox(
name: 'condition',
value: isCondition,
),
pw.SizedBox(width: 0.8 * PdfPageFormat.cm),
pw.Text(
'Condition of the above vehicle is satisfactory',
style: const pw.TextStyle(
fontSize: 14,
),
),
]),
pw.SizedBox(height: 0.8 * PdfPageFormat.cm),
pw.Row(children: [
pw.Text(
"Driver's Signature",
style: const pw.TextStyle(
fontSize: 14,
),
),
pw.Spacer(),
pw.Text(
'Date: ${LabelFormat.formatDate(dateToday)}',
style: const pw.TextStyle(
fontSize: 14,
),
),
]),
pw.SizedBox(height: 0.8 * PdfPageFormat.cm),
])
else
pw.Column(children: [
pw.Row(children: [
pw.Checkbox(
name: 'aboveDefectsCorrected',
value: true,
),
pw.SizedBox(width: 0.8 * PdfPageFormat.cm),
pw.Text(
'Above Defects Corrected',
style: const pw.TextStyle(
fontSize: 14,
),
),
pw.Checkbox(
height: 20,
width: 20,
name: 'sample',
value: true,
tristate: true,
decoration: pw.BoxDecoration(
color: PdfColors.blue,
),
),
]),
pw.SizedBox(height: 0.8 * PdfPageFormat.cm),
pw.Row(children: [
pw.Checkbox(
name: 'aboveDefectsNeed',
value: true,
),
pw.SizedBox(width: 0.8 * PdfPageFormat.cm),
pw.Text(
'Above Defects Need NOT Be Corrected For Safe Operation Of Vehicle',
style: const pw.TextStyle(
fontSize: 14,
),
),
]),
pw.SizedBox(height: 0.8 * PdfPageFormat.cm),
pw.Row(children: [
pw.Text(
"Mechanic's Signature",
style: const pw.TextStyle(
fontSize: 14,
),
),
pw.Spacer(),
pw.Text(
'Date: ${LabelFormat.formatDate(dateToday)}',
style: const pw.TextStyle(
fontSize: 14,
),
),
]),
pw.SizedBox(height: 0.4 * PdfPageFormat.cm),
pw.Row(children: [
pw.Text(
"Driver's Signature",
style: const pw.TextStyle(
fontSize: 14,
),
),
pw.Spacer(),
pw.Text(
'Date: ${LabelFormat.formatDate(dateToday)}',
style: const pw.TextStyle(
fontSize: 14,
),
),
]),
]),
],
),
);
return saveDocument(name: 'sample.pdf', pdf: pdf);
}
static Future<File> getDocument({
required String name,
required pw.Document pdf,
}) async {
final bytes = await pdf.save();
final dir = await getApplicationSupportDirectory();
final file = File('${dir.path}/$name');
await file.writeAsBytes(bytes);
print({'file:$file'});
return file;
}
static Future<File> saveDocument({
required String name,
required pw.Document pdf,
}) async {
final bytes = await pdf.save();
final directory = await getApplicationDocumentsDirectory();
final dvirDirectory = Directory('/storage/emulated/0/dvir documents');
await dvirDirectory.create(recursive: true);
final file = File('${dvirDirectory.path}/$name');
await file.writeAsBytes(bytes);
print('file saved to: ${file.path}');
return file;
}
static Future openFIle(File file) async {
final url = file.path;
await OpenFile.open(url);
}
}
我使用了带有 BoxDecoration 的标准容器。
Container(
width: 10,
height: 10,
decoration: BoxDecoration(
border: Border.all(
color: PdfColors.black,
width: 2.0,
),
),
),