How to display checked images while scrolling the UITableView? - ios

Question

UITable view is working fine. when scrolling checked image is changed to uncheck. And also i need to take the particular checked image data in SAVE button Action.Can any body help me to solve this problem in prj.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
cell.backgroundColor = [UIColor clearColor];
cell.selectionStyle= UITableViewCellSelectionStyleNone;
}
UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(10,10, 20, 20)];
[btn setImage:[UIImage imageNamed:#"unchecked.png"] forState:UIControlStateNormal]; [cell addSubview:btn];
btn.tag=4;
forState:UIControlStateNormal];
[btn addTarget:self action:#selector(checkBoxClicked:) forControlEvents:UIControlEventTouchUpInside];
UILabel *lbl_name =[[UILabel alloc]initWithFrame:CGRectMake(35, 10, 100, 20)];
lbl_name.text=[NSString stringWithFormat:#"%#",[[arr1 valueForKey:#"Name"]objectAtIndex:indexPath.row]];
lbl_name.tag=5;
lbl_name.textColor=[UIColor blackColor];
[lbl_name setTextAlignment:NSTextAlignmentCenter];
lbl_name.font=[UIFont systemFontOfSize:15];
[cell addSubview:lbl_name];
return cell;
}
-(void)checkBoxClicked:(id)sender
{
UIButton *tappedButton = (UIButton*)sender;
if([tappedButton.currentImage isEqual:[UIImage imageNamed:#"unchecked.png"]])
{
[sender setImage:[UIImage imageNamed: #"checked.png"] forState:UIControlStateNormal];
} else {
[sender setImage:[UIImage imageNamed:#"unchecked.png"]forState:UIControlStateNormal];
}
}

Answer 1

Take one array which is Use to store IndexValue of Selected button,
#property (nonatomic,retain) NSMutableArray *arySelected;
Initialize array in ViewDidLoad,
- (void)viewDidLoad {
[super viewDidLoad];
self.arySelected = [[NSMutableArray alloc] init];
}
Change Code of TableViewCell Delegate,
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
cell.backgroundColor = [UIColor clearColor];
cell.selectionStyle= UITableViewCellSelectionStyleNone;
}
UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(10,10, 20, 20)];
if (![arySelected containsObject:[NSString stringWithFormat:#"%ld",(long)indexPath.row]])
{
[btn setImage:[UIImage imageNamed: #"checked.png"] forState:UIControlStateSelected];
}
else
{
[btn setImage:[UIImage imageNamed:#"unchecked.png"] forState:UIControlStateNormal];
}
btn.tag=indexPath.row;
[btn addTarget:self action:#selector(checkBoxClicked:) forControlEvents:UIControlEventTouchUpInside];
[cell addSubview:btn];
UILabel *lbl_name =[[UILabel alloc]initWithFrame:CGRectMake(35, 10, 100, 20)];
lbl_name.text=[NSString stringWithFormat:#"%#",[[arr1 valueForKey:#"Name"]objectAtIndex:indexPath.row]];
lbl_name.tag=5;
lbl_name.textColor=[UIColor blackColor];
[lbl_name setTextAlignment:NSTextAlignmentCenter];
lbl_name.font=[UIFont systemFontOfSize:15];
[cell addSubview:lbl_name];
return cell;
}
// On your button Event,
-(void)checkBoxClicked:(id)sender
{
sender.selected = ! sender.selected;
if (sender.selected)
{
[arySelected addObject:[NSString stringWithFormat:#"%ld",(long)sender.tag]];
}
else
{
[arySelected removeObject:[NSString stringWithFormat:#"%ld",(long)sender.tag]];
}
[self.tableView reloadData];
}

Answer 2

you use the deferent state to set image like this.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
cell.backgroundColor = [UIColor clearColor];
cell.selectionStyle= UITableViewCellSelectionStyleNone;
}
UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(10,10, 20, 20)];
[btn setImage:[UIImage imageNamed:#"unchecked.png"] forState:UIControlStateNormal];
[sender setImage:[UIImage imageNamed: #"checked.png"] forState:UIControlStateSelected];
btn.selected=NO;
btn.tag=4;
[btn addTarget:self action:#selector(checkBoxClicked:) forControlEvents:UIControlEventTouchUpInside];
[cell addSubview:btn];
UILabel *lbl_name =[[UILabel alloc]initWithFrame:CGRectMake(35, 10, 100, 20)];
lbl_name.text=[NSString stringWithFormat:#"%#",[[arr1 valueForKey:#"Name"]objectAtIndex:indexPath.row]];
lbl_name.tag=5;
lbl_name.textColor=[UIColor blackColor];
[lbl_name setTextAlignment:NSTextAlignmentCenter];
lbl_name.font=[UIFont systemFontOfSize:15];
[cell addSubview:lbl_name];
return cell;
}
-(void)checkBoxClicked:(id)sender
{
UIButton *tappedButton = (UIButton*)sender;
if (tappedButton.isSelected) {
tappedButton.selected=NO;
}
else
{
tappedButton.selected=YES;
}
}