How can I get Twitter user profile information using the Twitter platform in iOS 5?

Well, lets say that you want to display the Twitter accounts that the user has on his device in the table. You probably want to display the avatar in a table cell, in which case you will need to request the Twitter API.

Assuming you have NSArrayobjects ACAccount, you can create a dictionary to store additional profile information for each account. The tableView:cellForRowAtIndexPath:following code will be required for your table view controller :

    // Assuming that you've dequeued/created a UITableViewCell...

    // Check to see if we have the profile image of this account
    UIImage *profileImage = nil;
    NSDictionary *info = [self.twitterProfileInfos objectForKey:account.identifier];
    if (info) profileImage = [info objectForKey:kTwitterProfileImageKey];

    if (profileImage) {
        // You'll probably want some neat code to round the corners of the UIImageView
        // for the top/bottom cells of a grouped style `UITableView`.
        cell.imageView.image = profileImage;

    } else {
        [self getTwitterProfileImageForAccount:account completion:^ {
            // Reload this row
            [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
        }];            
    }

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#pragma mark - Twitter

- (void)getTwitterProfileImageForAccount:(ACAccount *)account completion:(void(^)(void))completion {

    // Create the URL
    NSURL *url = [NSURL URLWithString:@"users/profile_image" relativeToURL:kTwitterApiRootURL];

    // Create the parameters
    NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                            account.username, @"screen_name", 
                            @"bigger", @"size",
                            nil];

    // Create a TWRequest to get the the user profile image
    TWRequest *request = [[TWRequest alloc] initWithURL:url parameters:params requestMethod:TWRequestMethodGET];

    // Execute the request
    [request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {

        // Handle any errors properly, not like this!        
        if (!responseData && error) {
            abort();
        }

        // We should now have some image data
        UIImage *profileImg = [UIImage imageWithData:responseData];

        // Get or create an info dictionary for this account if one doesn't already exist
        NSMutableDictionary *info = [self.twitterProfileInfos objectForKey:account.identifier];
        if (!info) {
            info = [NSMutableDictionary dictionary];            
            [self.twitterProfileInfos setObject:info forKey:account.identifier];
        }

        // Set the image in the profile
        [info setObject:profileImg forKey:kTwitterProfileImageKey];

        // Execute our own completion handler
        if (completion) dispatch_async(dispatch_get_main_queue(), completion);
    }];
}

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