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@@ -68,15 +68,31 @@ export class ReadingPdfComponent implements OnInit {
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await new Promise<void>((resolve) => requestAnimationFrame(() => resolve()));
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await document.fonts?.ready;
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const filename = `${article.title.replace(/[^a-zA-Z0-9一-龥]/g, '_')}_quiz.pdf`;
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- await html2pdf().set({
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+ let hasBlankTrailingPage = false;
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+ const worker = html2pdf().set({
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margin: [10, 10, 10, 10], filename,
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image: { type: 'jpeg', quality: 1 },
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html2canvas: { scale: 1.5, logging: false, useCORS: true, backgroundColor: '#ffffff' },
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jsPDF: { unit: 'mm', format: 'a4', orientation: 'portrait' },
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- pagebreak: { mode: ['css', 'legacy'], before: '.answer-section', avoid: ['.question-item', '.answer-item'] },
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- }).from(element).save();
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- } catch {
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- this.platform.toast('PDF 导出失败，请重试', 'error');
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- } finally { this.exporting.set(false); }
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+ pagebreak: {
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+ mode: ['css', 'legacy'],
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+ before: ['.question-section', '.answer-section'],
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+ avoid: ['.question-item', '.answer-item'],
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+ },
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+ }).from(element).toCanvas().get('canvas', (canvas) => {
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+ const pageHeight = Math.floor(canvas.width * (277 / 190));
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+ const trailingSlice = canvas.height % pageHeight;
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+ hasBlankTrailingPage = trailingSlice > 0 && trailingSlice < 32;
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+ }).toPdf();
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+ await worker.get('pdf', (pdf) => {
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+ const pageCount = pdf.internal.getNumberOfPages();
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+ if (hasBlankTrailingPage && pageCount > 1) pdf.deletePage(pageCount);
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+ }).save();
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+ } catch (error) {
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+ const detail = error instanceof Error ? error.message : '';
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+ this.platform.toast(detail ? `PDF 导出失败：${detail}` : 'PDF 导出失败，请重试', 'error');
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+ } finally {
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+ this.exporting.set(false);
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+ }
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}
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}
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彭峰