UITbaleView上按钮的单选(转载)

UITbaleView上按钮的单选

时间 2015-05-27 12:00:00  博客园-原创精华区

原文  http://www.cnblogs.com/hxwj/p/4533074.html

主题 UITableView

设置Id属性，标记是哪个cell

@property (nonatomic,assign)NSInteger Id;

设置一个普通状态和选中状态图片不同的按钮

_choose = [[UIButton alloc]init];
        [_choose setImage:[UIImage imageNamed:@"about_未勾选"] forState:UIControlStateNormal];
        [_choose setImage:[UIImage imageNamed:@"about_勾选"] forState:UIControlStateSelected];
        [_choose addTarget:self action:@selector(choosePressed:) forControlEvents:UIControlEventTouchUpInside];
        [self.contentView addSubview:_choose];

- (void)layoutSubviews {
    _choose.frame = CGRectMake(10, 120+wei_tiao, 20, 20);
}

设置一个可调整选中或者为选中的方法

- (void)setChecked:(BOOL)checked {
    if (checked) {
        _choose.selected = YES;
    }else {
        _choose.selected = NO;
    }
}

cell上按钮的单击事件

/**
 *  选择勾选
 *
 *  @param sender 按钮
 */
- (void)choosePressed:(UIButton *)sender {
    sender.selected = YES;
    if (_chooseBlock) {
        _chooseBlock(self.Id);
    }
}

设置一个全局变量来判定点了哪一个cell

NSInteger _cellIndex;

tableView代理：- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  ShippingAddressCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cellID"];
  cell.selectionStyle = UITableViewCellSelectionStyleNone;
  cell.Id = indexPath.row;
  if (_cellIndex == indexPath.row) {
    [cell setChecked:YES];
  }else {
    [cell setChecked:NO];
  }
  [cell setChooseBlock:^(NSInteger index) {
    _cellIndex = index;
    [_tableView reloadData];
  }];
  return cell;
}

效果图：

补：使用了block作为属性回调

1.申明block属性

@property (copy, nonatomic) void(^chooseBlock)(NSInteger index);

2.在本类里面调用

if (_chooseBlock) {
        _chooseBlock(self.Id);
    }

3.使用block属性：

[cell setChooseBlock:^(NSInteger index) {
        _cellIndex = index;
        [_tableView reloadData];
    }];