void MainWindow::on_btnSave_clicked(){ QString fileName = QFileDialog::getSaveFileName(this, tr("導出PDF文件"), QString(), "*.pdf"); if (!fileName.isEmpty()) { // 如果文件后綴為空，則默認使用.pdf if (QFileInfo(fileName).suffix().isEmpty()) {  fileName.append(".pdf"); } QPrinter printer; // 指定輸出格式為pdf printer.setOutputFormat(QPrinter::PdfFormat); printer.setOutputFileName(fileName); // ui->textEdit->print(&printer); ui->tableWidget->render(&printer); }}

void MainWindow::on_btnSave_clicked(){ QString fileName = QFileDialog::getSaveFileName(this, tr("保存PDF文件"), QString(), "*.pdf"); if (!fileName.isEmpty()) { // 如果文件后綴為空，則默認使用.pdf if (QFileInfo(fileName).suffix().isEmpty()) {  fileName.append(".pdf"); } QPrinter printerPixmap(QPrinter::HighResolution); //自定義紙張大小，這里要打印的內容都在stackedWidget上 printerPixmap.setPageSize(QPrinter::Custom); printerPixmap.setPaperSize(QSizeF(ui->stackedWidget->height(), ui->stackedWidget->width()), QPrinter::Point); //設置紙張大小為A4，這里注釋掉了，建議自定義紙張 ，否則保存的就會有很多空白 //printerPixmap.setPageSize(QPrinter::A4); //橫向打印 printerPixmap.setOrientation(QPrinter::Landscape); //設置輸出格式為pdf printerPixmap.setOutputFormat(QPrinter::PdfFormat); //設置輸出路徑 printerPixmap.setOutputFileName(fileName); //獲取界面的圖片 QPixmap pixmap = QPixmap::grabWidget(ui->stackedWidget, ui->stackedWidget->rect()); QPainter painterPixmap; painterPixmap.begin(&printerPixmap); QRect rect = painterPixmap.viewport(); int x = rect.width() / pixmap.width(); int y = rect.height() / pixmap.height(); //將圖像(所有要畫的東西)在pdf上按比例尺縮放 painterPixmap.scale(x, y); //畫圖 painterPixmap.drawPixmap(0, 0, pixmap); painterPixmap.end(); QMessageBox::information(this, tr("生成PDF"), tr("保存PDF文件成功"), QMessageBox::Ok); }}