Question

I have a UITableViewController that shows a list of items from NSMutableArray, along with a button that serves as a check box that the user can select/deselect. I am able to successfully display the table, as well as the checkboxes. However, I would like to have a tableheader at the very top of the table that would have a “select all” check box, which would allow the user to select all of the cells, or deselect all of the cells. If some cells are already checked off, then I want only those cells that are not selected, to be selected.

Here is the code that I have thus far:

- (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.selectionStyle = UITableViewCellSelectionStyleNone;

        testButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [testButton setFrame:CGRectMake(280, 57, 25, 25)];
        [testButton setImage:[UIImage imageNamed:@"CheckBox1.png"] forState:UIControlStateSelected];
        [testButton setImage:[UIImage imageNamed:@"CheckBox2.png"] forState:UIControlStateNormal];
        [testButton setUserInteractionEnabled:YES];
        [testButton addTarget:self action:@selector(buttonTouched:) forControlEvents:UIControlEventTouchUpInside];
        [cell setAccessoryView:testButton];

    }

    // Configure the cell...
    TestObject *tObject = [[DataModel sharedInstance].testList objectAtIndex:indexPath.row];
    cell.textLabel.text = tObject.testTitle;

    return cell;

}

-(void)buttonTouched:(id)sender
{
    UIButton *btn = (UIButton *)sender;

    if( [[btn imageForState:UIControlStateNormal] isEqual:[UIImage imageNamed:@"CheckBox1.png"]])
    {
        [btn setImage:[UIImage imageNamed:@"CheckBox2.png"] forState:UIControlStateNormal];
        // other statements
    }
    else
    {
        [btn setImage:[UIImage imageNamed:@"CheckBox1.png"] forState:UIControlStateNormal];
        // other statements
    }

}

//Here is the additional method that I have added to my code to select all
-(void)clickOnCheckButton {

    NSLog(@"Did it select?");

    for (int i = 0; i < [self.tableView numberOfSections]; i++) {
        for (int j = 0; j < [self.tableView numberOfRowsInSection:i]; j++) {
            NSUInteger ints[2] = {i,j};
            NSIndexPath *indexPath = [NSIndexPath indexPathWithIndexes:ints length:2];
            UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
            //Here is your code
            [self buttonTouched:nil];

        }
    }
}

Does anyone have any suggestions on how to do this?

Thanks in advance to all who reply.

Answer 1

Take another NSMUtableArray as SelectedArray

in didselectRowAtIndexPath row You can Add remove objects from SelectedArray.

You can select a cell calling table view’s selectRowAtIndexPath method:

[yourtable selectRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] animated:NO scrollPosition:UITableViewScrollPositionTop];

Put for loop for selectedArray to putcheckbutton only in selected cells.

in Your CellForRow Method Use this

testButton.tag=indexpath.row;

you can select All row and All Section by below method.

for (int i = 0; i < [ptableView numberOfSections]; i++) {
    for (int j = 0; j < [ptableView numberOfRowsInSection:i]; j++) {
        NSUInteger ints[2] = {i,j};
        NSIndexPath *indexPath = [NSIndexPath indexPathWithIndexes:ints length:2];
            UITableViewCell *cell = [ptableView cellForRowAtIndexPath:indexPath];
           //Here is your code

      UiButton *btn = (UiButton*)[cell.contentView viewWithTag:j]

if( [[btn imageForState:UIControlStateNormal] isEqual:[UIImage imageNamed:@"CheckBox1.png"]])
    {
        [btn setImage:[UIImage imageNamed:@"CheckBox2.png"] forState:UIControlStateNormal];
        // other statements
    }
    else
    {
        [btn setImage:[UIImage imageNamed:@"CheckBox1.png"] forState:UIControlStateNormal];
        // other statements
    }
        }
    }