KennDeinZeichen

1 Abstract

2 Preview

3 Final Project

4 Starter Project

Starter Project KennDeinZeichen

5 Live Demo

• Added NavigationStack and navigationTitle (No NavigationLink yet)
• Import JSON Loader
• Modified List so it imports the new data. With ?? if data is nil
• Add new Text (origin) and spacer to list

5.1 Summary

• What does the App do so far?

5.2 Task

• Start with the following App 02 KennDeinZeichen Model Loading

• The Sample Data only contains the minimum data. Check the JSON file contents (Inside Assets).

• Modify either the Struct or the Import (Google on how to import custom JSON within Swift).

• Add all missing elements.

• Replace the old ...Sample with the new file.

Hints:

• Look at the JSON structure - what additional fields are available?
• Properties that might not always be present should be optional (String?)
• The Decodable protocol automatically maps JSON keys to struct properties with matching names
• If JSON keys differ from your property names, you can use CodingKeys enum

6 Live Demo

• Build Model or copy it (Show all added components) (e.g. the Task)
• Build LicensePlate custom view (simple)
• Add simple custom view to List view. Flip both license and origin

6.1 Task

03 Project with custom Plate

Build a Struct that supports valid license plates

Requirements The LicensePlate shall be a Struct

• Contain no more than 8 characters
• The District can have 1 to 3 letters
• The Separation Letters can have 1 to 2 letters
• The Separation Number can have 1 to 4 digits
• The Suffix can either have None, an E for Electric, or an H for Historic. (Use a String Enum for that)

The struct shall have a failable init method. (Failable inits are marked with init? and can return nil if validation fails. Use Xcode autocomplete for help.)

Create a computed variable that will return the LicensePlate like: HH MZ 4224E (See the spaces!)

Hints:

• A failable init looks like: init?(district: String, letters: String, numbers: String, suffix: String?)
• Use guard statements to validate each component's length
• Return nil if any validation fails
• For the enum, consider: enum Suffix: String { case electric = "E", historic = "H" }
• The computed variable could be named formatted and use string interpolation: "\(district) \(letters) \(numbers)\(suffix ?? "")"