Question

我使用以下简单代码加载pdf表单，但我不希望以可编辑的形式加载它。我没有找到任何限制它的内容在仅查看模式下加载。

elasticsearch_dsl

由于

Answer 1

我认为您想禁用LongPressGestureRecognizer。像这样：

    private static void DisableDefaultLongPressGestureRecognizer(PdfKit.PdfView oPdfView)
    {
        oPdfView
            .GestureRecognizers
            .Where(x => x is UILongPressGestureRecognizer)
            .ForEach((oLongPressGestureRecognizer, nIndex) =>
            {
                oLongPressGestureRecognizer.Enabled = false;
            });
    }

Answer 2

在显示文档之前，我可以通过在文档的其他注释上添加空白注释来做到这一点。我在PDF文档中添加了一个 makeReadOnly（）扩展名，该扩展名用于所有注释，以使整个文档只读。

这样做的好处是所有其他PDF查看功能仍然可以正常工作。这是Swift代码。您可以对Objective-C类别执行类似的操作：

// A blank annotation that does nothing except serve to block user input
class BlockInputAnnotation: PDFAnnotation {

    init(forBounds bounds: CGRect, withProperties properties: [AnyHashable : Any]?) {
        super.init(bounds: bounds, forType: PDFAnnotationSubtype.stamp,  withProperties: properties)
        self.fieldName = "blockInput"
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func draw(with box: PDFDisplayBox, in context: CGContext)   {
    }
}


extension PDFDocument {
    func makeReadOnly() {
        for pageNumber in 0..<self.pageCount {
            guard let page = self.page(at: pageNumber) else {
                continue
            }
            for annotation in page.annotations {
                annotation.isReadOnly = true // This _should_ be enough, but PDFKit doesn't recognize the isReadOnly attribute
                // So we add a blank annotation on top of the annotation, and it will capture touch/mouse events
                let blockAnnotation = BlockInputAnnotation(forBounds: annotation.bounds, withProperties: nil)
                blockAnnotation.isReadOnly = true
                page.addAnnotation(blockAnnotation)
            }
        }

    }
}

在仅查看模式下使用PDF Kit加载pdf

2 个答案: