i'm trying to update my UITableview but when i call [tableView reloadData];
the table doens't update, after i scroll the tableview above the name of the cell while be changed. But it's not adding a new row or something like that.
-(void)update {
[tableView reloadData];
NSLog(@" %i", [tableData count]);
}
The nslog it's returing 1 when i add a row it's returning 2 but the table is not updating.
- (void) refresh:(id)sender {
NSString *jsonString = [NSString
stringWithContentsOfURL:[NSURL URLWithString:xmlDataUrl]
encoding:NSUTF8StringEncoding
error:nil];
SBJSON *parser = [[SBJSON alloc] init];
NSDictionary *results = [parser objectWithString:jsonString error:nil];
parser = nil;
[self setTableData:[results objectForKey:@"items"]];
[self performSelector:@selector(update) withObject:nil afterDelay:.2];
}
.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
// Change UITableViewCellStyle
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:CellIdentifier];
}
NSDictionary *item = [tableData objectAtIndex:[indexPath row]];
[[cell textLabel] setText:[item objectForKey:@"title"]];
[[cell detailTextLabel] setText:[item objectForKey:@"descript"]];
[[cell detailTextLabel] setText:[item objectForKey:@"detail"]];
.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [tableData count];
}
Every-time I have seen this problem it is a result of the UITableView
outlet not being connected. As a result the reloadData
call is sent to nil
. This is almost certainly what is wrong in this case. This can be easily tested by a simple log statement.
-(void)update {
NSLog(@"tableView is '%@'",tableView);
[tableView reloadData];
NSLog(@" %i", [tableData count]);
}
More likely than not you will see tableView is (null)
in the console.
Side note : The fact that the tableview populates at all is a sign that the dataSource
and delegate
outlets are connected.
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