Help with Delegate Methods

Caffeine · June 2012

I have tried going through this Question: How Does A Delegate Work and I still don't seem to have a full grasp on it. I am trying to use the CocoaAsyncSocket library to create a TCP socket connection. Thanks to help from a very friendly SO user, I have the following code to perform a read data request to the server:

- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag
{
    NSData *strData = [data subdataWithRange:NSMakeRange(0, [data length])];
    NSString *msg = [[NSString alloc] initWithData:strData encoding:NSUTF8StringEncoding];
    if(msg)
    {
        NSLog(@\"RX:%@\",msg);
    }
}

Now, forgive my ignorance as I'm pretty new to iOS development. So now I have this method that I want to invoke which will perform my ReadData. The problem is, I do not know WHERE to put this method (I have several views, with several header/implementation files). I want this method to be a delegate method, but I do not know how to make it a delegate method. I want to invoke this delegate method from my view.

If anyone could explain:

- Where do I put this code? (What file, etc)
- How do I make this a delegate method?
- How do I invoke this delegate method?

I've been stuck on this all day, and I'm about to throw it the towel lol. Any and all help is much appreciated.

Thanks so much!

Domele · June 2012

You put it in whichever file you create the AsyncSocket. Make sure to set its delegate property otherwise your method won't get called.

ZomZom · June 2012

I found delegates a bit difficult to wrap my head around, too. The protocol review in CS193P (Fall, 2011) Lecture 9 has been helpful.

Steps to Delegate - From Lecture 9
1. Create the @protocol
2. Add delegate @property to delegators public @interface
3. Use delegate property inside delegators implementation
4. Set the delegate property somewhere inside the delegates @implementation
5. Implement the protocols method(s) in the delegate (include <> on @interface)

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