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POiPhone add to NSMutableArray from another viewController
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copied!<p>I have a bit of a dilemma and I was wondering if the good folk here could lend me their programming expertise. I'll try to be as simple and precise as I possibly can so here goes:</p> <p>I'm a new IOS developer and have only been learning for a couple of months. I am developing an iPhone application for my dissertation at university. The app is simply a guide for people who wish to develop for the iPhone themselves, consisting of tutorials. It consists of numerous Table Views but there is one thing that has got me stumped.</p> <p>What im trying to do: One feature im trying to include in my app is a bookmarks facility, this will be accessible from a tab bar. I want to be able to click on a button from any nib file (tutorial) which adds a string to an existing NSMutableArray. This string will correspond with the name of the tutorial where the IB-Action was performed and after added to the Array I can load the nib file when selecting the row at index path.</p> <p>The Problem: I can add any object to the array from within the implementation file that contains the array but cannot figure out how to add it from a different implementation file. The UITable view populates from the array perfectly but adding a new entry is another story.</p> <p>I'll show you my code but i'll leave out anything that is unrelated.</p> <p><strong>BookmarksViewController.h</strong></p> <pre><code>@interface BookmarksViewController : UITableViewController { NSMutableArray *bookmarksArray; } @property (nonatomic, retain) NSMutableArray *bookmarksArray; @end </code></pre> <p><strong>BookmarksViewController.m</strong></p> <pre><code>-(void)viewDidLoad { bookmarksArray = [[NSMutableArray alloc] init]; NSLog(@"String Added"); [bookmarksArray addObject:@"String"]; [super viewDidLoad]; } -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { // Configure the cell... cell.textLabel.text = [bookmarksArray objectAtIndex:indexPath.row]; return cell; } -(void)dealloc { [bookmarksArray release]; [super dealloc]; } </code></pre> <p>NOW FOR THE SECOND VIEW CONTROLLER</p> <p><strong>Ch01GettingStarted.h</strong></p> <pre><code>@interface Ch01GettingStarted : UIViewController { IBOutlet UIScrollView *ScrollView; } -(IBAction) pushChap01Bookmark:(id)sender; @end </code></pre> <p><strong>Ch01GettingStarted.m</strong></p> <pre><code>-(IBAction) pushChap01Bookmark:(id)sender{ BookmarksViewController *bookmarksViewController = [[BookmarksViewController alloc]init]; [bookmarksViewController.bookmarksArray addObject:@"NewString"]; NSLog(@"ADD ENTRY"); [bookmarksViewController.tableView reloadData]; NSLog(@"RELOAD TABLE"); [bookmarksViewController release]; NSLog(@"ADD BOOKMARK RELEASE"); } </code></pre> <p>BTW - the IB-Action was declared in the header file.</p> <p>Ah, i originally tried doing this as '[BookmarksViewController.bookmarksArray addObject:@"NewString"];' but I came up with an "expected ':' at '.'" error and I read somewhere that I needed to use an instance variable of BookmarksViewController so i declared it just above the addObject method.</p> <p>Please be gentle with me as I haven't been doing this for long but this is certainly something that's going to be a big part of my professional future.</p> <p>Any insight anyone could offer to me would be magical. </p> <p>Thank you, thank you, thank you.</p>

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