Question

I am new to xcode and making my first iPhone app.

I have a UITableview with 8 rows in a tabbed screen. I have a code which let’s the user select maximum 4 rows at a time and mark it with checks when selected.

Now, when I change the view and navigate to the next tab I want to save the text from these checked rows in a single NSString variable separated by commas.

Is it possible to do so? Thank you, any help is very much appreciated.

Here is the code of the first tab from where I want to save the selected rows.

@implementation Psychological

static int count = 0;
- (void)viewDidLoad {
[super viewDidLoad];

listOfItems = [[NSMutableArray alloc] init];

[listOfItems addObject:@"1 option"];
[listOfItems addObject:@"2 option"];
[listOfItems addObject:@"3 option"];
[listOfItems addObject:@"4 option"];
[listOfItems addObject:@"5 option"];
[listOfItems addObject:@"6 option"];
[listOfItems addObject:@"7 option"];
[listOfItems addObject:@"8 option"];    

}
#pragma mark -
#pragma mark Table view data source

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


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section     {
// Return the number of rows in the section.
return [listOfItems 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];
}


// Configure the cell...
NSString *cellValue = [listOfItems objectAtIndex:indexPath.row];
cell.text = cellValue;



return cell;
}


#pragma mark -
#pragma mark Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
if ([selectedCell accessoryType] == UITableViewCellAccessoryNone) {
    if(count < 4)
    {
    [selectedCell setAccessoryType:UITableViewCellAccessoryCheckmark];
    [selectedIndexes addObject:[NSNumber numberWithInt:indexPath.row]];
        count++;
    }

} else {
    [selectedCell setAccessoryType:UITableViewCellAccessoryNone];
    [selectedIndexes removeObject:[NSNumber numberWithInt:indexPath.row]];
    count --;
}
[tableView deselectRowAtIndexPath:indexPath animated:NO];

}


- (void)dealloc {

[listOfItems release];
[super dealloc];
}


@end

Answer 1

the easiest way is make method wich will return string that you need. Method will look something like this:

- (NSString *) selectedItems {
    NSMutableString *result = [NSMutableString string];
    for (int i = 0; i < [itemsArray count]; i++) {
        NSIndexPath *path = [NSIndexPath indexPathForRow:i inSection:0];
        [tableView scrollToRowAtIndexPath:path atScrollPosition:UITableViewScrollPositionMiddle animated:NO];
        UITableViewCell *cell = [tableView cellForRowAtIndexPath:path];
        if (cell.accessoryType == UITableViewCellAccessoryCheckmark) {
            [result appendFormat:@"%@",cell.textLabel.text];
        }
    }
    if (result.length > 2) {
        [result replaceCharactersInRange:NSMakeRange(result.length-1, 1) withString:@""];
    }
return result;
}

To get this line in another view controller you should find Psychological view controller in navigationController.viewController and call this method.

- (void) method {
    for (UIViewController *vc in self.navigationController.viewControllers) {
        if ([vc isKindOfClass:[Psychological class]]) {
            NSString *str = vc.selectedItems;
        }
    }
}