This is how to get the version number of your app at run time. I find this helpful in to use in the “about” section of my apps. The version number is read from your apps info.plist file.

NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"];

The wrong way to do string comparisons in the iPhone SDK

if(myTitle == @"HELLO")

The right way

if([myTilte isEqualToString:@"HELLO"])