Debugging API calls and JSON responses is really important when making apps for iOS. It helps your app talk to servers the right way. Here are some simple tips to make debugging easier:

1. Use Postman or cURL

Before putting an API into your app, try testing it with tools like Postman or cURL.

These tools let you see exactly what you are sending and receiving without getting confused by your app's code.

Just open Postman, choose your request type (like GET or POST), and type in the URL and details you need. You’ll see the response right away, which is great for checking if the endpoint is working.

2. Use the Xcode Debugger

When you’re running your app, Xcode has great debugging tools.

You can set breakpoints where your app makes the API call and where it handles the response. This way, you can take a look at the variables and see the structure of the JSON response.

3. Print Statements

Add print statements to show the raw JSON response. For example:

print("Response JSON: \(String(describing: responseData))")

This helps you quickly check if the data you've received looks correct.

4. Use JSONSerialization

If you want to look closer at a JSON response, you can change it into a readable format using JSONSerialization. This lets you see the data clearly and make sure it's being read properly:

if let json = try? JSONSerialization.jsonObject(with: responseData, options: []) {
    print("Parsed JSON: \(json)")
}

By using these methods together, you’ll be ready to debug API calls and work with JSON data easily.

Happy coding!