My code is not good at all for the following reasons:
The NSURLConnection retrieves data synchronously
The decoding of JSON is not neat. A strong code smell
Synchronous network call
Next step: rewrite the below code to asynchronous mode.
In the viewDidLoad method of my ViewController, I called the following method:
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Decoding of JSON data
I used a lot of enumerators to walk through dictionaries and arrays at different level. It makes future changes to the JSON schema or objective-c object model difficult.