Question

I have the following Code in my XMLAppDelegate.m file:

- (void)applicationDidFinishLaunching:(UIApplication *)application {
    [self.window makeKeyAndVisible];

    self.products = [NSMutableArray array];
    XMLViewController *viewController = [[XMLViewController alloc] init];
    viewController.entries = self.products; // 2. Here my Array is EMPTY. Why?

    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:productData]];
    self.XMLConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];

    NSAssert(self.XMLConnection != nil, @"Failure to create URL connection.");

    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}

- (void)handleLoadedXML:(NSArray *)loadedData {
    [self.products addObjectsFromArray:loadedData]; // 1. here I get my Data (works fine)

    XMLViewController *viewController = [[XMLViewController alloc] init];
    [viewController.tableView reloadData];
}

I marked the problem. Is there any possibility to pass the loaded data (loadedData) to applicationDidFinishLaunching:?

Thanks in advance..

Answer 1

Where is your handleLoadedXML get called? If you want to pass it to applicationDidFinishLaunching can you just have your handleLoadedXML return that array and you can then call that method in applicationDidFinishLaunching.

Edit:

Think of it this way:

You first have this:

- (void)applicationDidFinishLaunching:(UIApplication *)application {
    [self.window makeKeyAndVisible];

    self.products = [NSMutableArray array];
    XMLViewController *viewController = [[XMLViewController alloc] init];
    viewController.entries = self.products; // 2. Here my Array is EMPTY. Why?

    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:productData]];
    self.XMLConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];

    NSAssert(self.XMLConnection != nil, @"Failure to create URL connection.");

    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}

Note that here you don’t have self.products set up yet. It’s only allocated.

After your application finished launching, then you have:

// say you have something like this
- (NSArray *)didFinishParsing {
    return someArray;
}

This method gets called somewhere, and then it calls the method below to set your self.products. Not until now is your self.products populated.

- (void)handleLoadedXML:(NSArray *)loadedData {
    [self.products addObjectsFromArray:loadedData]; // 1. here I get my Data (works fine)

    XMLViewController *viewController = [[XMLViewController alloc] init];
    [viewController.tableView reloadData];
}

So if you want self.products to be populated in applicationDidFinishLaunching, you need to call the method that generates the array in applicationDidFinishLaunching, say didFinishParsing, and you can do self.products = [self didFinishParsing];, and then it will be set.