控件總結（三）

//UITableView
// 去掉多餘的表格 tableView.tableFooterView = [[UIView alloc]init];

// 去掉cell之間的線
tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

// 設置cell右邊的設置 cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; // UITableViewCellAccessoryDisclosureIndicator, // UITableViewCellAccessoryDetailDisclosureButton, // UITableViewCellAccessoryCheckmark, // UITableViewCellAccessoryDetailButton

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• (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

// if (_open[section] == 1) { // return 0; // }

Province * province = _provinces[section];

if (province.isOpen) {
    return province.cityCount;
}

return 0;

}

• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

  static NSString * cellID = @"cellID";

  UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:cellID];

  if (!cell) { cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellID]autorelease]; }

// 刷新cell Province * province = _provinces[indexPath.section]; NSArray * cities = province.cities; cell.textLabel.text = cities[indexPath.row];

return cell;

}

// --UITableViewDelegate

• (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{

  return 60; }

• (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{ static NSString * headerID = @"headerID";

  UITableViewHeaderFooterView * headerView = [tableView dequeueReusableCellWithIdentifier:headerID];

  if (!headerView) { headerView = [[[UITableViewHeaderFooterView alloc]initWithReuseIdentifier:headerID]autorelease];

  //    添加label
    UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, 60)];
    label.tag = 1000;
    label.backgroundColor = [UIColor lightGrayColor];
    [headerView.contentView addSubview:label];
  
    label.userInteractionEnabled = YES;
  
    UITapGestureRecognizer * tap =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(clicked:)];
    [headerView.contentView addGestureRecognizer:tap];
    [tap release];
  
    UIImageView * imageView = [[UIImageView alloc]initWithFrame:CGRectMake(self.view.bounds.size.width/2-16, 25-16, 32, 32)];
  
    imageView.tag = 501;
  
    [headerView.contentView addSubview:imageView];
    [imageView release];
  
  
    [label release];

  }

  headerView.contentView.tag = section + 100;

// 刷新頁頭 UILabel * label = (UILabel *)[headerView.contentView viewWithTag:1000]; Province * province = _provinces[section];

label.text = province.proName;

UIImageView * imageView = (UIImageView *)[headerView.contentView viewWithTag:501];

// NSString * imageName = _open[section]?@"arrow_fold.png":@"arrow_spread"; // imageView.image = [UIImage imageNamed:imageName]; if (province.isOpen) { imageView.image = [UIImage imageNamed:@"arrow_spread"]; }else{ imageView.image = [UIImage imageNamed:@"arrow_fold"]; }

return headerView;

}

#pragma mark --手勢觸發的方法

• (void)clicked:(UITapGestureRecognizer *)tap{

  UIView * view = tap.view; NSLog(@"%ld",view.tag);

// 當前的分組 NSInteger section = view.tag - 100;

// 異或,兩個值都爲0，結果爲0，一個爲1，一個爲0 結果爲1 //
// _open[section] ^= 1; Province * province = _provinces[section];

// if (province.isOpen) { // province.isOpen = NO; // }else{ // province.isOpen = YES; // }

province.isOpen = !province.isOpen;


[_tableView reloadSections:[NSIndexSet indexSetWithIndex:section] withRowAnimation:UITableViewRowAnimationBottom];

}

@end