@property(nonatomic,strong)UIImageView *seletImage;

 //添加到cell上
[self.contentView addSubview:self.seletImage];

//初始化
-(UIImageView *)seletImage{
if (!_seletImage) {
  _seletImage = [[UIImageView alloc]init];
}
return _seletImage;
}

//坐标位置
[self.seletImage mas_makeConstraints:^(MASConstraintMaker *make) {
  @strongify(self);
  make.right.equalTo(self.contentView.mas_right).with.offset(-15);
  make.centerY.equalTo(self.self.contentView);
  make.height.mas_equalTo(22);
  make.width.mas_equalTo(22);
 }];

@property(nonatomic)BOOL isSelected;

  [[[RACObserve(self.viewModel, isSelected) takeUntil:self.rac_prepareForReuseSignal] deliverOnMainThread] subscribeNext:^(NSString *x){
  @strongify(self);
  if ([x boolValue]==YES) {
    [self.seletImage setImage:[UIImage imageNamed:@"alarmsetting_selected"]];
  }else{
    [self.seletImage setImage:[UIImage imageNamed:@"alarmsetting_notselected"]];
  }
}];

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
  [tableView deselectRowAtIndexPath:indexPath animated:YES];

 //遍历viewModel的数组，如果点击的行数对应的viewModel相同，将isSelected变为Yes，反之为No
  for (NSInteger i = 0; i<[self.viewModel.ItemArray count]; i++) {
    ItemViewModel *itemViewModel = self.viewModel.ItemArray[i];
    if (i!=indexPath.row) {
      itemViewModel.isSelected = NO;
    }else if (i == indexPath.row){
      itemViewModel.isSelected = YES;
    }
  }

  [self.tableView reloadData];
}