我有一个UITableView,我已经将UITableViewCell(称为CustomCell)子类化,因此它有几个标签和一个UI
ImageView.
只有某些单元格才能显示图像.这是我的tableView代码：cellForRowAtIndexPath ::
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
Match *aMatch = [[appDelegate.matchByDate objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
static Nsstring *CellIdentifier = @"Cell";
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[CustomCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
cell.homeLabel.text = aMatch.homeTeam;
cell.awayLabel.text = aMatch.awayTeam;
cell.timeLabel.text = aMatch.koTime;
cell.tournamentLabel.text = aMatch.tournament;
Nsstring *tempString = [appDelegate.teamlogos objectForKey:[aMatch homeTeam]];
if (tempString!=nil) {
cell.homeImageView.image = [UIImage imageNamed:tempString];
}
return cell;
}
因此,只有在我设置的字典中找到相应的图像时才设置homeImageView.这似乎适用于前几个单元格,但如果我滚动列表,我发现单元格没有一个图像.
我明白这可能是因为细胞被重复使用,但我在创建/重用细胞后设置了homeImageView？
这是我的CustomCell类的init方法
- (id)initWithStyle:(UITableViewCellStyle)style
reuseIdentifier:(Nsstring *)reuseIdentifier
{
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
// Initialization code
tournamentLabel = [[UILabel alloc] init];
tournamentLabel.textAlignment = UITextAlignmentCenter;
tournamentLabel.font = [UIFont systemFontOfSize:12];
tournamentLabel.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.0];
tournamentLabel.textColor = [UIColor darkGrayColor];
homeLabel = [[UILabel alloc]init];
homeLabel.textAlignment = UITextAlignmentLeft;
homeLabel.font = [UIFont systemFontOfSize:16];
homeLabel.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.0];
awayLabel = [[UILabel alloc]init];
awayLabel.textAlignment = UITextAlignmentRight;
awayLabel.font = [UIFont systemFontOfSize:16];
awayLabel.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.0];
timeLabel = [[UILabel alloc]init];
timeLabel.textAlignment = UITextAlignmentCenter;
timeLabel.font = [UIFont systemFontOfSize:30];
timeLabel.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.0];
timeLabel.textColor = [UIColor darkGrayColor];
homeImageView = [[UIImageView alloc]init];
awayImageView = [[UIImageView alloc]init];
[self.contentView addSubview:homeLabel];
[self.contentView addSubview:awayLabel];
[self.contentView addSubview:timeLabel];
[self.contentView addSubview:tournamentLabel];
[self.contentView addSubview:homeImageView];
[self.contentView addSubview:awayImageView];
}
return self;
}
解决方法
如果没有要显示的图像,则必须清除图像视图：
...
if (tempString!=nil) {
cell.homeImageView.image = [UIImage imageNamed:tempString];
} else {
cell.homeImageView.image = nil;
}
...