Objective-C Requires Chilkat v11.7.0+

QR Codes for Email, Phone, SMS and Location

See more QR Code Examples

Demonstrates QR codes that start an action on a phone. A QR code only holds text, and what happens on scanning depends on the form of that text: mailto: starts an email, tel: dials a number, SMSTO: starts a text message, and geo: opens a map at a latitude and longitude. A web address opens in the browser. Objective-C

#import <CkoFormats.h>
#import <CkoJsonObject.h>

BOOL success = NO;

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

CkoFormats *fmt = [[CkoFormats alloc] init];
CkoJsonObject *json = [[CkoJsonObject alloc] init];
CkoJsonObject *jsonOut = [[CkoJsonObject alloc] init];
[json UpdateInt: @"render.moduleSize" value: [NSNumber numberWithInt: 6]];
[json UpdateBool: @"output.overwrite" value: YES];
[json UpdateString: @"output.return" value: @"none"];

//  An email, with the address and optionally a subject.  Spaces in the subject are written %20.
[json UpdateString: @"payload.text" value: @"mailto:support@example.com?subject=Order%2012345"];
[json UpdateString: @"output.path" value: @"qa_output/qr_email.png"];
success = [fmt QrCode: @"generate" jsonIn: json jsonOut: jsonOut];
if (success == NO) {
    NSLog(@"%@",fmt.LastErrorText);
    return;
}

NSLog(@"%@%d%@%@",@"email: version ",[[jsonOut IntOf: @"symbols[0].selectedEncoding.version"] intValue],@", ",[jsonOut StringOf: @"outputs[0].path"]);

//  

//  A phone number to dial, in international form.
[json UpdateString: @"payload.text" value: @"tel:+15555550100"];
[json UpdateString: @"output.path" value: @"qa_output/qr_phone.png"];
success = [fmt QrCode: @"generate" jsonIn: json jsonOut: jsonOut];
if (success == NO) {
    NSLog(@"%@",fmt.LastErrorText);
    return;
}

NSLog(@"%@%d%@%@",@"phone: version ",[[jsonOut IntOf: @"symbols[0].selectedEncoding.version"] intValue],@", ",[jsonOut StringOf: @"outputs[0].path"]);

//  

//  A text message: the number, then the message.
[json UpdateString: @"payload.text" value: @"SMSTO:+15555550100:Please call me back"];
[json UpdateString: @"output.path" value: @"qa_output/qr_sms.png"];
success = [fmt QrCode: @"generate" jsonIn: json jsonOut: jsonOut];
if (success == NO) {
    NSLog(@"%@",fmt.LastErrorText);
    return;
}

NSLog(@"%@%d%@%@",@"sms: version ",[[jsonOut IntOf: @"symbols[0].selectedEncoding.version"] intValue],@", ",[jsonOut StringOf: @"outputs[0].path"]);

//  

//  A location: latitude, then longitude, in degrees.
[json UpdateString: @"payload.text" value: @"geo:41.8781,-87.6298"];
[json UpdateString: @"output.path" value: @"qa_output/qr_location.png"];
success = [fmt QrCode: @"generate" jsonIn: json jsonOut: jsonOut];
if (success == NO) {
    NSLog(@"%@",fmt.LastErrorText);
    return;
}

NSLog(@"%@%d%@%@",@"location: version ",[[jsonOut IntOf: @"symbols[0].selectedEncoding.version"] intValue],@", ",[jsonOut StringOf: @"outputs[0].path"]);

//  

//  Sample output:

//  email: version 4, qa_output/qr_email.png
//  phone: version 2, qa_output/qr_phone.png
//  sms: version 3, qa_output/qr_sms.png
//  location: version 2, qa_output/qr_location.png