从iPhone向Web服务发送1个请求与2个请求

Question

I'm working on iPhone app and I'd like to find out what's the best logical way to do the following:

From the app I have to send member_id and event_id to web service when user taps a button. I am using NSURLConnection and its delegate methods.

There's 2 things that need to happen:

1. Both ( member_id and event_id ) need to be inserted in table A on the server
2. Based on event_id web service has to respond with array of photos from table B.

What is proper logical way of doing this?

• Make one request and have the web service function handle insertion and response OR
• Make 2 requests at the same time (1 request to a function that will insert into database and second request to another function that will respond with photos)?

Keep in mind that I'm only sending member_id and event_id in both examples.

Answer 1

The first step is to design a web service API. That may sound simple, but the opposite is the case. The "client" never makes such decisions, rather it "adapts".

Once the web service API is set in stone, you try your best to implement the corresponding client API on iOS.

So, your task at the end of the day would possibly be to send a POST request whose content is JSON:

{
    "member_id": 1234567,
    "event_id": 7654321
}

What that JSON contains is defined by the web service API. Don't bother what the web service is doing with it - just give it what it requires.