how to check mark all the names in tableview - iphone

Question

i am displaying an array with names in tableview.
selected row will be indicated with check,and finely i am getting selected names into a list.
my code for that is
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.sourceArray count];;
}
// 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 = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
[cell.textLabel setText:[self.sourceArray objectAtIndex:indexPath.row]];
if ([self.selectedArray containsObject:[agentemails objectAtIndex:indexPath.row]]){
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
else
{
[cell setAccessoryType:UITableViewCellAccessoryNone];
}
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if ([self.selectedArray containsObject:[agentemails objectAtIndex:indexPath.row]]){
[self.selectedArray removeObjectAtIndex:[self.selectedArray indexOfObject:[agentemails objectAtIndex:indexPath.row]]];
}
else
{
[self.selectedArray addObject:[agentemails objectAtIndex:indexPath.row]];
}
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationNone];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
now i need to place a button select-all when ever use click on it i need to check all the names in the table how can i done can any one please help me.
Thank u in advance.

Answer 1

Try putting a BOOL in your header, then doing this:
-(IBAction)buttonPressed:(id)sender{
myBoolean = YES;
[tableView reloadData];
myBoolean = NO;
}
Then, in the cellForRowAtIndexPath method, just add this:
if(myBoolean){
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}

Answer 2

- (IBAction)selectAll:(id)sender
{
if(myBoolean)
{
for (NSInteger s = 0; s < self.iTable.numberOfSections; s++)
{
for (NSInteger r = 0; r < [self.iTable numberOfRowsInSection:s]; r++)
{
[[self.iTable cellForRowAtIndexPath:[NSIndexPath indexPathForRow:r inSection:s]] setAccessoryType:UITableViewCellAccessoryNone];
}
}
myBoolean = NO;
}
else
{
for (NSInteger s = 0; s < self.iTable.numberOfSections; s++)
{
for (NSInteger r = 0; r < [self.iTable numberOfRowsInSection:s]; r++)
{
[[self.iTable cellForRowAtIndexPath:[NSIndexPath indexPathForRow:r inSection:s]] setAccessoryType:UITableViewCellAccessoryCheckmark];
}
}
myBoolean = YES;
}
}