(Swift 2) QR Code Generator via api.qrserver.com REST API

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Demonstrates how to generate a QR code using the api.qrserver.com REST API service.

For more information, see https://goqr.me/api/doc/create-qr-code/

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let http = CkoHttp()
    var success: Bool

    // Send the following GET request to get a binary response.
    // The body of the binary response contains the image data for the QR code.
    // https://api.qrserver.com/v1/create-qr-code/?data=[URL-encoded-text]&size=[pixels]x[pixels]

    let queryParams = CkoJsonObject()
    queryParams.UpdateString("data", value: "Hello World")
    queryParams.UpdateString("size", value: "100x100")

    // Get a PNG file..
    // Possible formats are:
    // png
    // gif
    // jpeg
    // jpg
    // svg
    // eps
    // Case matters.  Use lowercase.
    queryParams.UpdateString("format", value: "png")

    // Send the GET request to an endpoint.
    // Chilkat will add the url-encoded query params passed in the JSON.
    var resp: CkoHttpResponse? = http.QuickRequestParams("GET", url: "https://api.qrserver.com/v1/create-qr-code/", json: queryParams)
    if http.LastMethodSuccess == false {
        print("\(http.LastErrorText)")
        return
    }

    // Did it succeed?
    if resp!.StatusCode.intValue != 200 {
        // The response body, if anything, would not be the image data, but would likely be the error text (or HTML, or whatever...)
        print("\(resp!.BodyStr)")
        print("Response status = \(resp!.StatusCode.intValue)")
        print("Failed.")
        resp = nil
        return
    }

    // Success if we get here..
    // Save the binary body as the PNG file, or you can get the bytes of the PNG..
    success = resp!.SaveBodyBinary("c:/temp/qa_output/qr_code.png")

    // Or get the bytes:
    let bd = CkoBinData()
    resp!.GetBodyBd(bd)
    // Use the bytes in bd...
    // See the online reference documentation for the function to access the bytes directly.

    resp = nil

    print("Success.")

}