Hi, i'm a newbie to iphone development. I'm doing a navigation-based app, and I'm having trouble passing values to a new view.

@interface RootViewController : UITableViewController {
    NSString *imgurl;
    NSMutableArray *galleryArray;
}

@property (nonatomic, retain) NSString *imgurl;
@property (nonatomic, retain) NSMutableArray *galleryArray;

- (void)showAll;

@end

#import "RootViewController.h"
#import "ScrollView.h"
#import "Model.h"
#import "JSON/JSON.h"

@implementation RootViewController

@synthesize galleryArray, imgurl;

- (void)viewDidLoad {   
    UIBarButtonItem *showButton = [[[UIBarButtonItem alloc]
                                initWithTitle:NSLocalizedString(@"Show All", @"")
                                style:UIBarButtonItemStyleBordered
                                target:self
                                action:@selector(showAll)] autorelease];
    self.navigationItem.rightBarButtonItem = showButton;

    NSString *jsonString = [[Model sharedInstance] jsonFromURLString:@"http://www.ddbstaging.com/gerald/gallery.php"];
    NSDictionary *resultDictionary = [jsonString JSONValue];

    if (resultDictionary == nil) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Webservice Down" 
                                                    message:@"The webservice you are accessing is currently down. Please try again later." 
                                                   delegate:self 
                                          cancelButtonTitle:@"OK" 
                                          otherButtonTitles:nil];
        [alert show];
        [alert release];
    }
    else {
        galleryArray = [[NSMutableArray alloc] init];
        galleryArray = [resultDictionary valueForKey:@"gallery"];
        imgurl = (NSString *)[galleryArray objectAtIndex:0];
        NSLog(@" -> %@", galleryArray);
        NSLog(imgurl);
    }
}

- (void)showAll {
    NSLog(@" -> %@", galleryArray);
    NSLog(imgurl);
    ScrollView *controller = [[ScrollView alloc] initWithJSON:galleryArray];
    [self.navigationController pushViewController:controller animated:YES];
}

The RootViewController startup and the json data loads up fine. I can see it from the first console trace. However, once I click on the Show All button, the app crashes. It doesn't even trace the galleryArray and imgurl properyly.

Maybe additional pairs of eyes can spot my mistakes. Any help is greatly appreciated!

[Session started at 2010-05-08 16:16:07 +0800.]
2010-05-08 16:16:07.242 Photos[5892:20b]  -> (
)
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