Swift Requires Chilkat v11.7.0+

What PDF Text Replacement Does Not Change: Metadata, Links, Form Fields

See more PDF Text Replacement Examples

TextReplace changes the page content only. A placeholder that also appears in the document's metadata (the Title, Author, Subject, Keywords, Creator or Producer), in a link's target URL, or in a form field's value is left as it is and reported in "notReplaced" with "where" saying which. The invoice template's title is "Invoice for {{customer}}" and its "View this invoice online" link points at a URL that holds {{customer}}. Swift

func chilkatTest() {
    var success: Bool = false

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  The PDF used in this example is available at invoice_template.pdf

    let pdf = CkoPdf()!
    success = pdf.loadFile(filePath: "qa_data/pdf/invoice_template.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    let json = CkoJsonObject()!
    json.updateString(jsonPath: "placeholders.customer", value: "Acme Corp")
    //  (The other placeholders are left as they are for this example.)
    json.updateString(jsonPath: "unusedPlaceholders", value: "keep")

    let jsonOut = CkoJsonObject()!
    success = pdf.textReplace(op: "apply", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("In the page content, customer was replaced \(jsonOut.int(of: "replacements[0].count").intValue) times.")

    //  Where else the placeholder occurs, untouched:
    var i: Int = 0
    var count_i: Int = jsonOut.size(ofArray: "notReplaced").intValue
    while i < count_i {
        jsonOut.i = i
        print("not replaced: {{\(jsonOut.string(of: "notReplaced[i].field")!)}} in \(jsonOut.string(of: "notReplaced[i].where")!)")
        i = i + 1
    }

    success = pdf.writeFile(path: "qa_output/invoice_customer.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    //  Sample output:

    //  In the page content, customer was replaced 2 times.
    //  not replaced: {{customer}} in metadata
    //  not replaced: {{customer}} in linkTarget

}