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PONSMutableArray to NSString and Passing NSString to Another View IOS5.1
 

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    <p>I have an NSMutableArray of names. I want the pass the data (selected name) inside of NSMutableArray as text to another view's label. </p> <p>FriendsController.m:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; arrayOfNames=[[NSMutableArray alloc] init]; arrayOfIDs=[[NSMutableArray alloc] init]; userName=[[NSString alloc] init]; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { long long fbid = [[arrayOfIDs objectAtIndex:indexPath.row]longLongValue]; NSString *user=[NSString stringWithFormat:@"%llu/picture",fbid]; [facebook requestWithGraphPath:user andDelegate:self]; userName=[NSString stringWithFormat:@"%@",[arrayOfNames objectAtIndex:indexPath.row]]; FriendDetail *profileDetailName = [[FriendDetail alloc] initWithNibName: @"FriendDetail" bundle: nil]; profileDetailName.nameString=userName; [profileDetailName release]; } - (void)request:(FBRequest *)request didLoad:(id)result { if ([result isKindOfClass:[NSData class]]) { transferImage = [[UIImage alloc] initWithData: result]; FriendDetail *profileDetailPicture = [[FriendDetail alloc] initWithNibName: @"FriendDetail" bundle: nil]; [profileDetailPicture view]; profileDetailPicture.profileImage.image= transferImage; profileDetailPicture.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; [self presentModalViewController:profileDetailPicture animated:YES]; [profileDetailPicture release]; } } </code></pre> <p>In FriendDetail.h</p> <pre><code>NSString nameString; IBOutlet UILabel *profileName; @property (nonatomic, retain) UILabel *profileName; @property (nonatomic, retain) NSString *nameString; </code></pre> <p>In FriendDetail.m</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; profileName.text=nameString; } </code></pre> <p><code>nameString</code> in second controller(FriendDetail) returns <code>nil</code>. When i set a breakpoint in firstcontroller I see the string inside of <code>nameString</code> is correct but after that it returns to <code>nil</code> somehow.</p> <p>-----------------------EDIT----------------------------------------</p> <p>According to answers I have improved my code little bit FriendsController.h</p> <pre><code> FriendDetail *friendController; @property (strong, nonatomic) FriendDetail *friendController; </code></pre> <p>FriendsController.m</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; arrayOfNames=[[NSMutableArray alloc] init]; arrayOfIDs=[[NSMutableArray alloc] init]; arrayOfThumbnails=[[NSMutableArray alloc] init]; userName=[[NSString alloc] init]; friendController= [[FriendDetail alloc] initWithNibName: @"FriendDetail" bundle: nil]; } -(void)request:(FBRequest *)request didLoad:(id)result{ if ([result isKindOfClass:[NSData class]]) { transferImage = [[UIImage alloc] initWithData: result]; friendController.nameString=userName; [friendController view]; friendController.profileImage.image= transferImage; friendController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; [self presentModalViewController:friendController animated:YES]; } //this is how i take facebook friends list if ([result isKindOfClass:[NSDictionary class]]){ items = [[(NSDictionary *)result objectForKey:@"data"]retain]; for (int i=0; i&lt;[items count]; i++) { NSDictionary *friend = [items objectAtIndex:i]; long long fbid = [[friend objectForKey:@"id"]longLongValue]; NSString *name = [friend objectForKey:@"name"]; NSLog(@"id: %lld - Name: %@", fbid, name); [arrayOfNames addObject:[NSString stringWithFormat:@"%@", name]]; [arrayOfIDs addObject:[NSNumber numberWithLongLong:fbid]]; } } } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { long long fbid = [[arrayOfIDs objectAtIndex:indexPath.row]longLongValue]; NSString *user=[NSString stringWithFormat:@"%llu/picture",fbid]; userName=[NSString stringWithFormat:@"%@",[arrayOfNames objectAtIndex:indexPath.row]]; [facebook requestWithGraphPath:user andDelegate:self]; [username retain] } </code></pre> <p>Now when i select row first time it sends name. When i come back to tableview and select another name it shows the old name.</p> <p>If I delete <code>[username retain]</code> in <code>didSelectRowAtIndexPath:</code> it still sends <code>nil</code> to <code>nameString</code></p> <p>when I set break point at <code>didSelectRowAtIndexPath:</code> at line `</p> <pre><code>userName=[NSString stringWithFormat:@"%@",[arrayOfNames objectAtIndex:indexPath.row]]` </code></pre> <p>I can see <code>userName = @"Adam Dart"</code> which is correct </p> <p>in my second breakpoint at line <code>friendController.nameString=userName;</code> I see that <code>nameString =nil</code> and <code>userName = Variable is not CFString</code></p> <p>ARC is set to NO</p>
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