How do you send ten network requests simultaneously using GCD?

To send ten network requests simultaneously using GCD (Grand Central Dispatch) in iOS, you can create a DispatchGroup and add asynchronous requests to it. This allows all requests to run in parallel and track their completion.

Example in Swift:

let dispatchGroup = DispatchGroup()

for i in 1...10 {
    dispatchGroup.enter()
    let url = URL(string: "https://example.com/request\(i)")!
    let task = URLSession.shared.dataTask(with: url) { data, response, error in
        // Handle response
        print("Request \(i) completed")
        dispatchGroup.leave()
    }
    task.resume()
}

dispatchGroup.notify(queue: .main) {
    print("All requests completed")
}

This approach allows efficient management of parallel tasks and executing code after all requests are finished.