将标注类型注释添加到iOS PDFTron库

Question

I am facing an issue wherein the PDFNET framework for iOS is successfully rendering callout type annotation made from other platform. But I am unable to allow users of iOS app to make the same annotation from start.

Answer 1

This is a programmatic example of how to create a callout annotation using PDFNet:

    let txtannot: PTFreeText = PTFreeText.create(doc.getSDFDoc(), pos: PTPDFRect(x1: 100, y1: 100, x2: 350, y2: 500))
        txtannot.setContentRect(PTPDFRect(x1: 200, y1: 200, x2: 350, y2: 500))
        txtannot.setContents("\n\nSome swift brown fox snatched a gray hare out of the air by freezing it with an angry glare." +
            "\n\nAha!\n\nAnd there was much rejoicing!")
        txtannot.setCalloutLinePoints(withKneePoint: PTPDFPoint(px: 200, py: 300), p2: PTPDFPoint(px: 150, py: 290), p3: PTPDFPoint(px: 110, py: 110))
        txtannot.setBorderStyle(PTBorderStyle(s: e_ptsolid, b_width: 1, b_hr: 10, b_vr: 20), oldStyleOnly: true)
        txtannot.setEndingStyle(e_ptClosedArrow)
        txtannot.setColor(PTColorPt(x: 0, y: 1, z: 0, w: 0), numcomp: 3)
        txtannot.setQuaddingFormat(1)
        first_page.annotPushBack(txtannot)
        txtannot.refreshAppearance()

(An Obj-C version can be found in the miscellaneous sample project, or on PDFTron's website .)

If you wish to create a callout annotation interactively, you will need to create a new "tool" to do so. All of PDFNet for iOS's UI widgets and annotation creation/editing methods are part of the open source framework Tools.framework, found in /Lib/Tools . By using existing tools as sa guide (which create free text annotations, text markup annotations, fill forms, sign documents, etc.), you can create a new tool for creating callout annotations interactively.

SO discolsure: I work for PDFTron.