+(instancetype)initWithTableView:(UITableView *)tableView{
static NSString *identifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if (cell == nil) {
cell = [[self alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
}
//这两句是重点
cell.multipleSelectionBackgroundView = [[UIView alloc] initWithFrame:cell.bounds];
cell.multipleSelectionBackgroundView.backgroundColor = [UIColor clearColor];
//这两句是重点
return cell;
}