Swift Requires Chilkat v11.7.0+

Replace PDF Text on Selected Pages Only

See more PDF Text Replacement Examples

Demonstrates the "pages" option, which limits the search for placeholders and labels to the given pages: "all" (the default), "first", "last", "odd", "even", or a list such as "1,3,5-9". The two-page order confirmation carries the same "Status:" label on both pages; the status is changed on page 2 only, then on both pages. 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 order_confirmation.pdf

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

    let json = CkoJsonObject()!
    let jsonOut = CkoJsonObject()!

    //  Both pages have "Status:   Pending".  With pages "2", only page 2 is searched.
    json.updateString(jsonPath: "pages", value: "2")
    json.updateString(jsonPath: "labels[0].label", value: "Status:")
    json.updateString(jsonPath: "labels[0].value", value: "Shipped")
    success = pdf.textReplace(op: "check", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("pages 2: found on page(s) \(jsonOut.string(of: "replacements[0].pages")!)")

    //  With every page searched, the default occurrence ("first") still replaces one -- the first in reading order.
    json.updateString(jsonPath: "pages", value: "all")
    success = pdf.textReplace(op: "check", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("pages all, first occurrence: found on page(s) \(jsonOut.string(of: "replacements[0].pages")!)")

    //  Every occurrence on every page.
    json.updateString(jsonPath: "labels[0].occurrence", value: "all")
    success = pdf.textReplace(op: "apply", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("pages all, every occurrence: \(jsonOut.int(of: "replacements[0].count").intValue) replaced on page(s) \(jsonOut.string(of: "replacements[0].pages")!)")

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

    //  Sample output:

    //  pages 2: found on page(s) 2
    //  pages all, first occurrence: found on page(s) 1
    //  pages all, every occurrence: 2 replaced on page(s) 1,2

}