问题描述

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];    }}

解决方案

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;}

解决方案二：
这段代码新建了cell：

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