yue1liang1chuan
2013-01-21 06:32
采纳率: 69.8%
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已采纳

滚动UITableview改变UIbutton的图片

有一个UITableView,然后添加了一个自定义视图作为UIButton。每个button都有一个tag,在动作方法中获取tag,当点击按钮时,会改变选中和取消按钮的图片,问题是,等到我滚动它时,又回复了正常状态。

这是索引方法中cell的行。

static NSString *CellIdentifier = @"Cell4";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
    cell = [self tableviewCellWithReuseIdentifierFollowing:CellIdentifier];
}
followingButton = [UIButton buttonWithType:UIButtonTypeCustom];
[followingButton addTarget:self action:@selector(followingButtonpressed:)forControlEvents:UIControlEventTouchUpInside];
[followingButton setImage:[UIImage imageNamed:@"following12.png"] forState:UIControlStateNormal];
followingButton.frame = CGRectMake(220.0 ,20.0, 100, 40.0);
[cell.contentView addSubview:followingButton];
NSLog(@"row--%d",indexPath.row);
followingButton.tag=indexPath.row;
NSLog(@"followingButton.tag--%d",followingButton.tag);
[self configureCellFollowing:cell forIndexPath:indexPath];
return cell;
}

==================

//Here is the action method

-(void)followingButtonpressed:(id)sender
{
    NSLog(@"sender tag --%d",[sender tag]);
    UIButton *btnPly = (UIButton *)sender;
    if([btnPly isSelected])
    {
        [btnPly setSelected:NO];
        [btnPly setImage:[UIImage imageNamed:@"following12.png"] forState:UIControlStateNormal];
    }
    else
    {
        [btnPly setSelected:YES];
        [btnPly setImage:[UIImage imageNamed:@"following_off12.png"] forState:UIControlStateNormal];
    }
}
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2条回答 默认 最新

  • garaster 2013-01-21 06:53
    已采纳

    这是因为每次你滚动的时候就会调用:

    [followingButton setImage:[UIImage imageNamed:@"following12.png"] forState:UIControlStateNormal];
    

    因此改为下面的代码就解决了:

    static NSString *CellIdentifier = @"Cell4";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [self tableviewCellWithReuseIdentifierFollowing:CellIdentifier];
    
    followingButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [followingButton addTarget:self action:@selector(followingButtonpressed:)forControlEvents:UIControlEventTouchUpInside];
    
    [followingButton setImage:[UIImage imageNamed:@"following12.png"] forState:UIControlStateNormal];
    
    followingButton.frame = CGRectMake(220.0 ,20.0, 100, 40.0);
    [cell.contentView addSubview:followingButton];
    
    [self configureCellFollowing:cell forIndexPath:indexPath];
    }
    return cell;
    }
    
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  • Mr_me 2013-01-21 08:05

    这段代码新建了cell:

    NSString *CellIdentifier = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
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