The idea of this recipe is to see the Swift way to create a string using variable values. In Objective-C, we have a class method called stringWithFormat, but this method isn't used in Swift with the same frequency as it is used in Objective-C because now we have interpolation. In this example, we will create an app, which will show to the user three possible products. When the user chooses one of them, the app must show the information of this product and also its price if it's available.
Create a new single view project called
Chapter2 Product Value. Now, let's click on the storyboard and add three buttons, as shown here:
Once you've done this, you can add a new swift file called
Product. Now, we will create a class with a product name, its price, and the manufacturer name.In this case, the only information that can be omitted is the product price; the other attributes are not optional. This means that we will need an initializer with at least...