Dial a phone number with an access code programmatically in iOS

Question

How can I dial a phone number that includes a number and access code programmatically in iOS?

For example:

number: 900-3440-567
Access C

Answer 1

follow the tutorial

http://www.makebetterthings.com/blogs/iphone/open-phone-sms-email-map-and-browser-apps-in-iphone-sdk/

to call a number use -

NSURL *url = [NSURL URLWithString:@"tel://012-4325-234"];
[[UIApplication sharedApplication] openURL:url];

to open your app after call finished use -

(Note: telprompt is undocumented)

NSURL *url = [NSURL URLWithString:@"telprompt://012-4325-234"];
[[UIApplication sharedApplication] openURL:url];