PDFViewerApplication.pdfViewer.currentPageNumber是一个获取器和设置器。例如: // Go to page 5 PDFViewerApplication.pdfViewer.currentPageNumber = 5; // Move two pages forward PDFViewerApplication.pdfViewer.currentPageNumber += 2;
TypeError: PDFViewerApplication.pdfViewer is null
TypeError: PDFViewerApplication.pdfViewer is null
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我错过了什么? - Brad Porter