📱 DevSphere iOS App (Medium)

Build a Currency Converter App using Swift & SwiftUI by integrating a real-time exchange rate API.

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🚀 Getting Started

1️⃣ Fork the Repository

Click on the Fork button on the top right of this repository.

2️⃣ Clone the Repository

git clone https://github.com/Google-Developers-Group-IIIT-Lucknow/DevSphere-App-iOS-Medium.git

3️⃣ Open in Xcode

• Open Xcode
• Click on Open a Project
• Select the cloned folder

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🧑‍💻 Your Task

Navigate to logic.swift and implement the following:

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1. Fetch Exchange Rates (API Integration)

API Endpoint:

https://open.er-api.com/v6/latest/{BASE_CURRENCY}

Example:

https://open.er-api.com/v6/latest/USD

What to implement:

• Make an API call using URLSession
• Decode the response into ExchangeRateResponse
• Store the rates in the rates dictionary
• Handle loading state using isLoading
• Handle errors using errorMessage

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2. Convert Currency

What to implement:

• Take the input amount
• Convert from fromCurrency to toCurrency
• Use the exchange rates fetched from the API

Formula:

Converted Amount = Amount × (To Currency Rate / From Currency Rate)

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📦 API Info

Property	Value
Base URL	https://open.er-api.com
Auth	No API key required
Endpoint	/v6/latest/{BASE_CURRENCY}

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✅ Requirements

• Fetch real-time exchange rates from the API
• Implement correct conversion logic
• Handle invalid inputs properly
• Show loading and error states
• Keep code clean and readable

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⭐ Important Notes

❌ Do NOT hardcode exchange rates
✅ Always use live API data
🔄 Ensure conversion updates correctly when inputs change

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📁 Project Structure

Currency_Converter/
├── logic.swift          ← Your implementation goes here
├── ContentView.swift
├── Config.swift
└── ...

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🤝 Contributing

1. Fork the repository
2. Create your branch: git checkout -b your-branch-name
3. Commit your changes: git commit -m "implement currency converter logic"
4. Push to the branch: git push --set-upstream origin your-branch-name
5. Open a Pull Request