tableview好友列表的实现

收缩

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展开

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tableview 的section的协议方法 （避免重用问题 可以 自定义一个类继承于UITableViewHeaderFooterView 给他设置属性，参照tableview的cell一样赋值）
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
    /*
     标题label + 分割线 + button
     */
    UITableViewHeaderFooterView *heaerView = [tableView dequeueReusableHeaderFooterViewWithIdentifier:HEADERID];
    
    if (!heaerView) {
        heaerView = [[UITableViewHeaderFooterView alloc]initWithReuseIdentifier:HEADERID];
    }
        UILabel *titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, kWidth - 64, 64)];
        //标题赋值
        titleLabel.text = _dataSource[section][0][@"techniquesType"];
        titleLabel.font = [UIFont boldSystemFontOfSize:22];
        
        UILabel *linelabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 63, kWidth - 20, 1)];
        linelabel.backgroundColor = [UIColor lightGrayColor];
        UIButton *button = [[UIButton alloc]initWithFrame:CGRectMake(kWidth - 54, 10, 44, 43)];
        button.backgroundColor = [UIColor redColor];
        button.tag = 100 + section;
        //判断里面有值与否 来控制button的状态
        if ([_dict objectForKey:[NSString stringWithFormat:@"%ld",section]]) {
            button.selected = YES;
        }else{
            button.selected = NO;
        }
      
        [button setImage:[UIImage imageNamed:@"inter_open"] forState:UIControlStateNormal];
        [button setImage:[UIImage imageNamed:@"inter_close"] forState:UIControlStateSelected];
        [button addTarget:self action:@selector(action_sectionbutton:) forControlEvents:UIControlEventTouchUpInside];
        [heaerView addSubview:titleLabel];
        [heaerView addSubview:linelabel];
        [heaerView addSubview:button];
        heaerView.contentView.backgroundColor = [UIColor whiteColor];
        
    return heaerView;
}
收缩展开的点击事件
- (void)action_sectionbutton:(UIButton *)sender{
    if (!_dict) {
        _dict = [NSMutableDictionary dictionary];
    }
    NSString *key= [NSString stringWithFormat:@"%ld",sender.tag - 100];
    if (![_dict objectForKey:key]) {
        [_dict setObject:@"1" forKey:key];
    }else{
        [_dict removeObjectForKey:key];
    }
 //刷新某一个section
    [self.tableview reloadSections:[NSIndexSet indexSetWithIndex:sender.tag - 100] withRowAnimation:UITableViewRowAnimationFade];
}

tableview的section高度的协议方法
//row的高度
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    if ([_dict objectForKey:[NSString stringWithFormat:@"%ld",indexPath.section]]) {
         return 44.0;
    }else{
        return 0;
    }
}