Question

I want to create a NSURLConnection delegate in Xcode 4.5.2 for iOS because the documentation suggests it. For now I am putting the following code (taken directly from the documentation) into my AppDelegate.m in the method application didFinishLaunchingWithOptions:.

// Create the request.
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.apple.com/"]
                        cachePolicy:NSURLRequestUseProtocolCachePolicy
                    timeoutInterval:60.0];
// create the connection with the request
// and start loading the data
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if (theConnection) {
    // Create the NSMutableData to hold the received data.
    // receivedData is an instance variable declared elsewhere.
    receivedData = [[NSMutableData data] retain];
} else {
    // Inform the user that the connection failed.
}

How do I create the delegate in AppDelegate.h ?
Where and how do I declare the variable receivedData?

Answer 1

You shouldn’t be doing this in the AppDelegate, but just to make it work, here’s what you need to do.

1) In your AppDelegate.h, replace the interface declaration with this ::

@interface AppDelegate : UIResponder <UIApplicationDelegate, NSURLConnectionDataDelegate> {
    NSMutableData *receivedData;
}  

2) In your AppDelegate.m, add this method ::

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    [receivedData setData:data];
    NSLog(@"receivedData : %@", receivedData);
}