(iOS/iPhone/XCode) textField and Buttons to submit data to Safari

I'm trying to develop an application and am stuck at this specific part. I was previously taking a different approach through a web form displayed in UIWebView, but was having issues getting it to open how I wanted. I changed the UI and would now like to tak开发者_如何学JAVAe this approach:

Background

User needs to be able to get directions to a specific shop location. The UI contains an instance of UIText Field and a round rect button. The User should be able to click the button and the default Maps application will pop up for the user.

How I imagine this being coded:

1) User enters address in textField

- textField stores address as variable (%var%)

2) User presses Go button

- Button adds variable (%var%) from textField to URL string (see below)

- Button submits full URL to be opened in Safari

3) Safari opens request in Maps application

Image Example of UI: http://i55.tinypic.com/vnjc41.jpg

http://maps.google.com/?saddr=%var%&daddr=123+Road+St%2C+Town%2C+CA+90210&hl=en

Found a better way to do this using a button to open the maps application:

-(IBAction)hbgdirButton:(id)sender{ [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://maps.google.com/maps?q=Harrisburg+PA&hl=en"]]; }