- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {//1.创建重用标识符.static NSString *identifier = @"heihei";//2.根据重用标识符去重用队列中取可重用的cell.UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];//3.判断是否成功取到可重用的cell.cell是否为空.if (!cell) {//4.cell为空,说明没有成功取到cell.则创建一个cell.cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:identifier] autorelease];cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; //辅助视图样式,小箭头

    }NSDictionary *dic = self.addressDic[self.sortedKeys[indexPath.section]][indexPath.row];cell.textLabel.text = dic[@"name"];cell.detailTextLabel.text = dic[@"phone"];cell.imageView.image = [[UIImage imageNamed:dic[@"imageName"]] scaleToSize:CGSizeMake(40, 40)];return cell;
}

//提交编辑操作, 对删除操作作出处理.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {//总共分两步:1.修改数据源 2.修改界面//1.获取删除行对应的分区key.(是B分组,还是C分组)NSString *key = self.sortedKeys[indexPath.section];//2.根据key获取对应的可变数组.NSMutableArray *group = self.addressDic[key];if (editingStyle == UITableViewCellEditingStyleInsert) {//处理插入操作//1.修改数据源NSDictionary *dic = @{@"name":@"Frank", @"age":@"18", @"gender":@"man", @"phone":@"110", @"imageName":@""};[group insertObject:dic atIndex:indexPath.row];//2.修改界面
        [tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationRight];} else {//处理删除操作//需要判断是否要删除一个分区.if (group.count == 1) {//删除分区//1.修改数据源//从字典中根据key移除对应的元素.
            [self.addressDic removeObjectForKey:key];//从排好序的key值数组中移除对应的key.
            [self.sortedKeys removeObject:key];//2.修改界面NSIndexSet *indexSet = [NSIndexSet indexSetWithIndex:indexPath.section];[tableView deleteSections:indexSet withRowAnimation:UITableViewRowAnimationRight];} else {[group removeObjectAtIndex:indexPath.row]; //删除行对应的字典.//删除界面上的一行.
            [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationRight];}}
}

//提交移动操作.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath {//因为移动操作界面已经发生变化,我们只需要修改数据源即可.//1.获取到分区对应的数组.NSMutableArray *group = self.addressDic[self.sortedKeys[sourceIndexPath.section]];//分区对应的数组//2.将原位置对应的元素取出来保存.NSDictionary *dic = [group[sourceIndexPath.row] retain]; //retain 引用计数加1, 否则移除时就造成引用计数为0,空间回收了.//3.将原位置对应的元素删除掉.
    [group removeObjectAtIndex:sourceIndexPath.row];//4.将保存的元素插入到目的位置.
    [group insertObject:dic atIndex:destinationIndexPath.row];//5.释放所有权
    [dic release];
}

- (NSIndexPath *)tableView:(UITableView *)tableView targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath {//sourceIndexPath 移动之前的位置//proposedDestinationIndexPath 即将要移动到的位置if (sourceIndexPath.section == proposedDestinationIndexPath.section) {return proposedDestinationIndexPath;}return sourceIndexPath;}

self.navigationItem.rightBarButtonItem = self.editButtonItem;