在表格视图上单击按钮以更改表格视图单元格中的图像

Question

I have one table view cell with one button. On click of the cell button which has one method to check the if button tag equals to indexPath.row . Then I am trying to change the image. But its not showing.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:
(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"FilterTableViewCell";
    FilterTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    cell.cellBtn.tag = indexPath.row;
    cell.radioImage.tag = indexPath.row;
    [cell.cellBtn addTarget:self action:@selector(ButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
    return cell;
}

-(void)ButtonClicked:(UIButton*)sender
{
     int rowNum = [(UIButton*)sender tag];
        NSIndexPath* indexPath = [NSIndexPath indexPathForRow:_currentSelectedIndex inSection:0];
    FilterTableViewCell *cell = [_tableView cellForRowAtIndexPath:indexPath];
    if (sender.tag == rowNum) {
        cell.radioImage.image = [UIImage imageNamed:@"selected.png"];
    } else {
        cell.radioImage.image = [UIImage imageNamed:@"unselected.png"];
    }

}

Here button image is not changing. What I need is, when ever I click on any cell that particular cell image needs to change and other cells should show unselected image. And when ever I click on any cell which image is changed as selected image. I needs to get that particular cell values like textlabel name, subtextlabel name.

How can i achive that. What's the problem here ?

Updated :

    -(void)ButtonClicked:(UIButton*)sender
    {
       int rowNum = [(UIButton*)sender tag];
FilterTableViewCell *cell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:rowNum inSection:0]];
 if (sender.tag != _currentSelectedIndex) {
        cell.radioImage.image = [UIImage imageNamed:@"selected.png"];
    } else {
        cell.radioImage.image = [UIImage imageNamed:@"unselected.png"];
    }
}

Answer 1

add these two delegates of tableView:

- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
    FilterTableViewCell *cell = [_tableView cellForRowAtIndexPath:indexPath];
    cell.radioImage.image = [UIImage imageNamed:@"unselected.png"];
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    FilterTableViewCell *cell = [_tableView cellForRowAtIndexPath:indexPath];
    cell.radioImage.image = [UIImage imageNamed:@"selected.png"];
}

and then change ButtonClicked to:

-(void)ButtonClicked:(UIButton*)sender
{
    int rowNum = [(UIButton*)sender tag];
    NSIndexPath* indexPath = [NSIndexPath indexPathForRow:_currentSelectedIndex inSection:0];
    if (sender.tag == rowNum) {
        [_tableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionNone];
    }    
}

Answer 2

I read your code. What i found is that you made a mistake in the button tapped method.

    -(void)ButtonClicked:(UIButton*)sender
    {
         int rowNum = [(UIButton*)sender tag];
            NSIndexPath* indexPath = [NSIndexPath indexPathForRow:_currentSelectedIndex inSection:0];
        FilterTableViewCell *cell = [_tableView cellForRowAtIndexPath:indexPath];
        if (sender.tag == rowNum) {
    cell.radioImage.image = [UIImage imageNamed:@"selected.png"];
        } else {
            cell.radioImage.image = [UIImage imageNamed:@"unselected.png"];
        }

    }

The if condition which you have placed is always return true because first you store the sender's tag to rowNum and then you compare both the two .

CONDITION ALWAYS BE TRUE AND FOLLOWING CODE WILL BE EXECUTED

    cell.radioImage.image = [UIImage imageNamed:@"selected.png"];