关于objective C：iOS：UIButton 背景图像在滚动时自定义 uitableviewcell 中的按钮被删除

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- (UITableViewCell *)tableView:(UITableView *)tableView
     cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
...
...
PlayerTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"playerCell"];
    if(cell == nil) {

        NSArray* topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"PlayerTableViewCell" owner:self options:nil];
        for (id currentObject in topLevelObjects) {
            if ([currentObject isKindOfClass:[PlayerTableViewCell class]])
                cell = (PlayerTableViewCell *)currentObject;
        }
    }
numberImage = [self getUserImage:[self._collectionsNewGame[indexPath.row -1] objectForKey:@"hostBirthday"] isSign:false];
            signImage =[self getUserImage:[self._collectionsNewGame[indexPath.row -1] objectForKey:@"hostBirthday"] isSign:true];
cell.numberButton setBackgroundImage:[UIImage imageNamed:numberImage] forState:UIControlStateNormal];
        [cell.signButton setBackgroundImage:[UIImage imageNamed:signImage] forState:UIControlStateNormal];
...
...
}

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[tableView dequeueReusableCellWithReuseIdentifier:@"playerCell" forIndexPath:indexPath];

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[tableView dequeueReusableCellWithIdentifier:@"playerCell"];