(Swift) Transition from Zip.AppendString to Zip.AddString

Provides instructions for replacing deprecated AppendString method calls with AddString.

Note: This example requires Chilkat v11.0.0 or greater.

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func chilkatTest() {
    let zip = CkoZip()!

    // ...
    // ...
    var pathInZip: String? = "example.txt"
    var textData: String? = "This is a test"

    // ------------------------------------------------------------------------
    // The AppendString method is deprecated:

    var entryObj: CkoZipEntry? = zip.append(pathInZip, str: textData)
    if zip.lastMethodSuccess == false {
        print("\(zip.lastErrorText!)")
        return
    }

    // ...
    // ...

    entryObj = nil

    // ------------------------------------------------------------------------
    // Do the equivalent using AddString.

    // Instead of returning the zip entry object, we just return success/failure.
    var success: Bool = zip.addString(pathInZip, content: textData, charset: "utf-8")
    if success == false {
        print("\(zip.lastErrorText!)")
        return
    }

    // Do the following if you need the zip entry object for what was just appended.
    // The newly appended entry is the last one.
    let ze = CkoZipEntry()!
    var index: Int = zip.numEntries.intValue - 1
    zip.entry(at: index, entry: ze)

}