Q:

Unable to reloaddata(UITableView)

I'm creating a UITableView in an UIView controller
- (void)viewDidLoad
{
    [super viewDidLoad];
    self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 470, self.view.frame.size.height) style:UITableViewStylePlain];
    self.tableView.dataSource = self;
    self.tableView.delegate = self;
    [self.view addSubview:self.tableView];
    NSLog(@"tableView is '%@'",self.tableView);
}

the NSLog result :"tableView is '< UITableView: 0x7c60c00; frame = (0 0; 470 1004); clipsToBounds = YES; gestureRecognizers = ; layer = ; contentOffset: {0, 0}>'"
the refreshTableView method will be called, when the itemArray is modified by other controller
**SideBarViewController *sideBarViewController = [[SideBarViewController alloc]init];
[sideBarViewController refreshTableView];**

-(void)refreshTableView {
    [self createItemArray];
    NSLog(@"reload itemArray->%@",self.itemArray);
    NSLog(@"tableView is '%@'",self.tableView);
    [self.tableView reloadData];
}

somehow, the NSLog result become:"tableView is '(null)'". and the tableView won't be reloaded.
why? please help. thanks.
Update:
the NSLog of itemArray was fine:
before change
reload itemArray->(
    "test.md"
)
after change
reload itemArray->(
    "test.md",
    "test2.md"
)
Update2:
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.itemArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    cell.textLabel.text = [self.itemArray objectAtIndex:indexPath.row];
    return cell;
}

update 3:
.h
@interface SideBarViewController : UIViewController<IIViewDeckControllerDelegate,UITableViewDataSource,UITableViewDelegate>

.m
@interface SideBarViewController ()
@property (nonatomic,strong) UITableView *tableView;
@end

@implementation SideBarViewController
@synthesize tableView = _tableView;

update 4:
the 
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath*)indexPath 

method is working fine, after deleted rows the tableview was reloaded. 

A:

You can try to use Notification

add Observer into you viewDidLoad in Sidebarvc
[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(refreshTableView:)
                                                 name:@"dataChanged"
                                               object:nil];
create a method to refresh
-(void)refreshTableView:(NSNotification *)notif{
}
on the other VC，just wait for the notification
[[NSNotificationCenter defaultCenter] postNotificationName:@"dataChanged"
                                                    object:nil];

4.don't forget to clean it 
add [[NSNotificationCenter defaultCenter] removeObserver:self]; to ViewDidUnload

Should work.

