UITableView set checkbox state from database values - ios

Question

I am storing checkbox values (true/false) in database. I want to set checkbox checked/unchecked depending on the values stored in database. how to do that ? my code is,
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *CellIdentifier = [NSString stringWithFormat:#"Cell%i",indexPath.row];
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell==nil)
{
cell= [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.textLabel.numberOfLines = 0;
cell.textLabel.font = [UIFont fontWithName:#"Helvetica" size:14.0];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
cell.textLabel.font = [UIFont fontWithName:#"Helvetica-Bold" size:18.0];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.textLabel.frame=CGRectMake(75.0, 50.0, 150.0, 20.0);
cell.textLabel.text=[listArray objectAtIndex:indexPath.row];
NSLog(#"Checked arr size %i",[checkedArr count]);
BOOL checked = [[checkedArr objectAtIndex:indexPath.row] boolValue];
UIImage *image = (checked) ? [UIImage imageNamed:#"white_bg.png"] : [UIImage imageNamed:#"tick.png"];
cell.accessoryView = [[UIImageView alloc] initWithImage:image];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
BOOL checked = [[checkedArr objectAtIndex:indexPath.row] boolValue];
[checkedArr removeObjectAtIndex:indexPath.row];
[checkedArr insertObject:(checked) ? #"FALSE":#"TRUE" atIndex:indexPath.row];
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
UIImage *newImage = (checked) ? [UIImage imageNamed:#"tick.png"] : [UIImage imageNamed:#"white_bg.png"];
cell.accessoryView=[[UIImageView alloc] initWithImage:newImage];
NSLog(#"Val is %i",val);
NSLog(#"selected is %#",[listArray objectAtIndex:indexPath.row]);
}
I am storing those values in database using an array checkedArr.
[dbObj insertQuestData:Question answers:listArray checkVal:checkedArr];
here dbObj is database object, others are values that i am storing to database.
Please let me know how to achieve the same.

Answer 1

The list array and checked array should be mutable array sent to database function which fills up the data.
self.listArray = [NSMutableArray array];
self.checkedArray = [NSMutableArray array];
[dbObj insertQuestData:Question answers:self.listArray checkVal:self.checkedArray];
// [self insertList:self.listArray andChecks:self.checkedArray];
The insertQuestData methods should fill up data like this -
- (void) insertList:(NSMutableArray *)list andChecks:(NSMutableArray *)checks
{
for (int i = 0; i < 100; i++) {
[list addObject:[NSString stringWithFormat:#"item %d", i]];
BOOL checkValue = (i % 4) == 0 ? YES : NO;
[checks addObject:[NSNumber numberWithBool:checkValue]];
}
}
The table datasource methods should be like this - (notice the commented line as correction to your code)
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.listArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *CellIdentifier = #"CellIdentifier";//[NSString stringWithFormat:#"Cell%i",indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell==nil)
{
cell= [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.textLabel.numberOfLines = 0;
cell.textLabel.font = [UIFont fontWithName:#"Helvetica" size:14.0];
// cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
// cell.textLabel.font = [UIFont fontWithName:#"Helvetica-Bold" size:18.0];
// cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
// cell.textLabel.frame=CGRectMake(75.0, 50.0, 150.0, 20.0);
cell.textLabel.text=[self.listArray objectAtIndex:indexPath.row];
NSLog(#"Checked arr size %i",[self.checkedArray count]);
BOOL checked = [[self.checkedArray objectAtIndex:indexPath.row] boolValue];
UIImage *image = (!checked) ? [UIImage imageNamed:#"white_bg.png"] : [UIImage imageNamed:#"tick.png"];
cell.accessoryView = [[UIImageView alloc] initWithImage:image];
return cell;
}
This is what my sample code show on iPhone - [every 4th row is (green)ticked/selected and others are grey/unselected]
Feel free to ask if you have any specific questions / issues you face.