GPT Chat App

A simple iOS chat application built with SwiftUI that integrates with OpenAI's GPT-4 API using Server-Side Events for real-time streaming responses.

Features

🎨 iMessage-style chat bubbles - Beautiful, rounded chat bubbles with proper alignment
📱 Native iOS interface - Clean, modern UI that feels native to iOS
⚡ Real-time streaming - Uses Server-Side Events for smooth, real-time GPT responses
🎯 Smart scrolling - Auto-scrolls to show new messages with smooth animations
⌨️ Keyboard-friendly - Responsive text input with proper keyboard handling

Setup Instructions

Get your OpenAI API Key
- Go to OpenAI Platform
- Create a new API key
- Copy the key
Configure the app
- Open GPTClientApp/Config.swift
- Replace "YOUR_API_KEY_HERE" with your actual OpenAI API key:
```
static let openAIAPIKey = "sk-your-actual-api-key-here"
```
Build and Run
- Open the project in Xcode
- Select your target device or simulator
- Press Cmd + R to build and run

Architecture

The app is structured with the following components:

ChatMessage - Data model for chat messages
ChatBubbleView - SwiftUI view for individual chat bubbles
OpenAIService - Service class handling OpenAI API communication with SSE
ContentView - Main chat interface with message list and input field
Config - Configuration constants including API key

Requirements

iOS 14.0+
Xcode 12.0+
Valid OpenAI API key with GPT-4 access

Usage

Launch the app
Type your message in the text field at the bottom
Tap the send button (paper plane icon)
Watch as GPT-4 responds in real-time with streaming text
Continue the conversation!

API Usage

The app uses OpenAI's Chat Completions API with the following configuration:

Model: gpt-4
Streaming: Enabled (Server-Side Events)
Max tokens: 1500

Security Note

Make sure to keep your API key secure and never commit it to version control. Consider using environment variables or secure keychain storage for production apps.

ProxymanApp/GPTClientApp