ReloadData（UITableView）不起作用

Question

I got a big problem.

[self.tableView reloadData];

Doesn't work, and I don't understand why.

[[self tableView] reloadData];

Doesn't work too.

Here is my code:

.h

@interface ArticleViewController : UITableViewController <UITableViewDataSource, UITableViewDelegate> 
{ 
} 
@end

.m

- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.dataSource = self;
self.tableView.delegate = self;
}

btnLeft = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"btnLeft"]
                                         style:UIBarButtonItemStylePlain
                                        target:self
                                        action:@selector(loadPlist)];
self.navigationItem.leftBarButtonItem = btnLeft;

In the loadPlist method, I'm writing in a .plist file. This part work fine.

Once all is write in the .plist file :

btnRight = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"btnRight"]
                                          style:UIBarButtonItemStylePlain
                                         target:self
                                         action:@selector(reloadTheTB)];
self.navigationItem.rightBarButtonItem = btnRight;

- (void)reloadTheTB {
NSLog(@"Test reloadTheTB");

[[self tableView] reloadData];
}

If I touch btnRight , I can see in the log " Test reloadTheTB ".

Here is tableView:cellForRowAtIndexPath:

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

        if(cell == nil)
            cell = [self getCellContentView:CellIdentifier];

        contentDictio = [dict objectAtIndex:indexPath.row];

        UILabel *lblTemp1 = (UILabel *)[cell viewWithTag:1];

        lblTemp1.text = [contentDictio objectForKey:@"title"];

        if(indexPath.row % 2) {
            UIView* myBackgroundView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
            myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_grise"]];
            cell.backgroundView = myBackgroundView;
        }
        else {
            UIView* myBackgroundView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
            myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_blanche"]];
            cell.backgroundView = myBackgroundView;
        }
    }

    return cell;
}

UPDATE:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}

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

Help me please...

Answer 1

Actually I'm wondering this how you know that reloadData is not called?

Try to put some log in cellForRowAtIndexPath? to see if is called or not when you click your button? and also in do this :

- (void)reloadTheTB {
   NSLog(@"Test reloadTheTB");
   NSLog(@"%@",dict);
  [[self tableView] reloadData];

}

Is the content of your dictionary what you expect? or is not changed after loadPlist?

Probably the call to reloadData is not executed on the main thread and you can update the UI only on the main thread. Try to execute your method on the main thread doing something like this :

-(void)ReloadTheTB{   
  [self.tableView performSelectorOnMainThread@selector(reloadData) withObject:nil waitUntilDone:NO]
}