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Showing Version Info

I found that I need some place to show a version in my apps, because otherwise I and my testers never know if we are talking about the same version. A problem they might be having could have already been fixed previously. Without a version info you are at a loss.

Here’s a version info box, that I came up with. This shows how to access the version string from Info.plist as well as open a new mail to the author.

- (IBAction) showAppInfo:(id)sender
{
	// a convenient method to get to the Info.plist in the app bundle
	NSDictionary *info = [[NSBundle mainBundle] infoDictionary];
 
	// get two items from the dictionary
	NSString *version = [info objectForKey:@"CFBundleVersion"];
	NSString *title = [info objectForKey:@"CFBundleDisplayName"];
 
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[@"About " stringByAppendingString:title]
						  message:[NSString stringWithFormat:@"Version %@\n\n© 2009 Drobnik.com", version]
						  delegate:self
						  cancelButtonTitle:@"Dismiss"
						  otherButtonTitles:@"Contact", nil];
	[alert show];
	[alert release];
}
// this function from UIAlertViewDelegate is called when a button is pushed
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
	UIApplication *myApp = [UIApplication sharedApplication];
 
	// cancel button has index 0
	switch (buttonIndex) {
		case 1:
		{
			[myApp openURL:[NSURL URLWithString:@"mailto:oliver@drobnik.com"]];
			break;
		}
		default:
			break;
	}
 
}

Two buttons are displayed side by side. Three or more are vertically stacked. This is how the result from the code about looks like:

All Purpose About Box


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