01-Objective-C-OOP

Homework: Objective-C Fundamentals

Mandatory use Objective-C as language for the tasks

Problem 1. Define class

• Define a class that holds information about a mobile phone device:
• model, manufacturer, price, owner, battery characteristics (model, hours idle and hours talk) and display characteristics (size and number of colors)
• Define 3 separate classes (class GSM holding instances of the classes Battery and Display).

Problem 2. Initializer methods

• Define several initializer methods for the defined classes that take different sets of arguments (the full information for the class or part of it
  • At least 3
• Define a factory method for each initializer method
• Assume that model and manufacturer are mandatory (the others are optional). All unknown data fill with null.

Problem 3. Enumeration

• Add an enumeration BatteryType (Li-Ion, NiMH, NiCd, …) and use it as a new field for the batteries
• Read about enumerations in Objective-C

Problem 4. description

• Add a method in the GSM class for displaying all information about it.
• Use the description method

Problem 5. Properties

• Use properties to encapsulate the data fields inside the GSM, Battery and Display classes
• Ensure all fields hold correct data at any given time
• Use getters and setters

Problem 6. Class method

• Add a class method IPhone5S in the GSM class that returns a ready-to-use GMS instance

Problem 7. iOS application

• Create an iOS application to work with the phones
• The application should contain the following scenes:
  • A scene where all GSMs are listed
    • Use UITableViewController or UIViewController with a UITableView inside it
    • When a GSM is tapped show a scene with details for this GSM instance
  • A scene with details about a GSM
  • A scene for adding new GSM
    • Mandatory fields must be filled
    • Optional fields must be present, but the user may not fill them
    • When a GSM is created, navigate to the List GSMs scene
      • The new GSM should be there
• Use extensively the storyboard and segues