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@ iOS App
2025-06-13 21:29:28SPEC.md - Swift Calculator Architecture
1. Overview
The Swift Calculator is a lightweight, user-friendly calculator application built for iOS using Swift. It supports basic arithmetic operations, a clear/reset function, and a responsive UI.
2. Architecture
The application follows the Model-View-ViewModel (MVVM) pattern to separate concerns and improve maintainability.
2.1 Components
- Model (
CalculatorModel.swift): - Handles the core logic for arithmetic operations (addition, subtraction, multiplication, division).
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Manages the current state (e.g., display value, pending operations).
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ViewModel (
CalculatorViewModel.swift): - Acts as the intermediary between the Model and View.
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Processes user inputs (e.g., button taps) and updates the Model and View accordingly.
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View (
CalculatorView.swift): - Responsible for the UI layout (buttons, display label).
- Observes the ViewModel for changes and updates the UI.
2.2 Key Features
- Basic Operations: Supports
+,-,*,/. - Clear/Reset: A
Cbutton to reset the calculator state. - Error Handling: Displays "Error" for invalid operations (e.g., division by zero).
- Responsive UI: Adapts to different screen sizes and orientations.
2.3 Data Flow
- User interacts with the View (e.g., taps a button).
- View sends the input to the ViewModel.
- ViewModel processes the input and updates the Model.
- Model updates its state and notifies the ViewModel.
- ViewModel updates the View with the new state.
3. Technical Stack
- Language: Swift 5
- Framework: SwiftUI (for declarative UI) or UIKit (if preferred)
- Dependency Management: Swift Package Manager (SPM)
4. Future Enhancements
- Support for scientific operations (e.g., square root, exponents).
- Dark mode support.
- Memory functions (M+, M-, MR).
- Model (