I would like to know how to create a web form in native iOS code. Take a look at Twitter and Facebook’s login forms:

Twitter uses <label>username</label> while Facebook uses <input type="text" placeholder="Email" />. I just don’t know how to convert HTML into Objective-C and/or Interface Builder. I don’t even know what these components are called so I couldn’t Google them.
For the Twitter login, they use a grouped UITableView with two rows and one section. Each row contains two cells (Value 1) which contain a UITextField.
In the Facebook app, the same goes, but there are two sections (UITextField cells and login button). They then have a UIButton at the bottom which allows people to sign up.