... startField.text = @"Begin: 1 59, 230"; startField.center = CGPointMake(1 59, 230); endField.text = @"Begin: 1 59, 230"; endField.center = CGPointMake(1 59, 230); bottomLabel.text = ... For that, we point you, as usual, to the Apple iPhone developer website. There’s a good tutorial on multi-touch events available as part of the iPhone OSProgramming Guide that you should read ... events give you low-level access to the unique user input allowed by the iPhone. Since much of this book is about how the iPhone is unique, we’d like to delve into it much further. On the other...