UItableView中滑动删除 cell

最新推荐文章于 2023-05-18 15:04:23 发布

转载最新推荐文章于 2023-05-18 15:04:23 发布 · 7k 阅读

文章标签：

#table #insert #class #资讯

本文介绍UITableView的编辑功能实现，重点讲解如何通过两个关键方法设置单元格的编辑样式及响应删除操作。文章还提供了代码示例，展示如何在删除单元格的同时更新数据源，确保视图与数据一致。

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主要是就是两个函数
一：- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
相应editingStyle事件处理
在这里主要相应UITableViewCellEditingStyleDelete：

二：(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath

在这个函数中设置那个cell设置成什么样的editingStyle删除，插入，无
UITableViewCellEditingStyleDelete
UITableViewCellEditingStyleInsert
UITableViewCellEditingStyleNone

需要注意的问题：在删除对应cell中的内容时，也要删除这个cell，否则运行时显示效果就像没有刷新一样，多出一个cell。而使用[tableView reloadData];[self loadView];刷新都不管用。必须使用deleteRowsAtIndexPaths:withRowAnimation:函数删除这个cell

    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];

[tableView reloadData];据说reloadData只是从新加载表项内容，而不会重新设置表内cection中cell的个数。

#pragma mark Table view methods

- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath
{
    //NSLog(@"accessoryTypeForRowWithIndexPath");
    if( 0 == indexPath.section ){
        if( indexPath.row == [m_URLArray count]){
            return UITableViewCellAccessoryDetailDisclosureButton;
        }
        GFdataURL *currentURl ;
        currentURl = [[[GFdataURL alloc] init] autorelease];
        currentURl = [m_URLArray objectAtIndex: indexPath.row];
        //[currentURl release];
        //int i = [indexPath row];
        if([currentURl.m_strSubscribe isEqualToString:@"y"]){
            return UITableViewCellAccessoryCheckmark;
        }else{
            return UITableViewCellAccessoryNone;
        }
    }else{
        return UITableViewCellAccessoryDetailDisclosureButton;
    }

}

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

}

- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
    //NSLog(@"accessoryButtonTappedForRowWithIndexPath");
    //NSInteger sectionSelect = [indexPath section];
    //NSInteger rowSelect = [indexPath row];
    //NSLog(@"选中了%d--%d",sectionSelect,rowSelect);
    switch(indexPath.section){
        case 0:
            //资讯设置
            if( indexPath.row == [m_URLArray count]){
                m_addNewsURL = [[addNewsURL alloc] initWithNibName:@"addNewsURL" bundle:nil];
                [self.navigationController pushViewController:m_addNewsURL animated:YES];
            }
            break;
        case 1:
            //货币设置
            switch(indexPath.row){
                case 0:
                    //跳转到默认类型设置页面
                    m_defaltType = [[currencySettingForDefaultTypeViewController alloc] initWithNibName:@"currencySettingForDefaultType" bundle:nil];
                    m_defaltType.isDefaultType = YES;
                    [self.navigationController pushViewController:m_defaltType animated:YES];
                    break;
                case 1:
                    //跳转到兑换类型设置页面
                    m_defaltType = [[currencySettingForDefaultTypeViewController alloc] initWithNibName:@"currencySettingForDefaultType" bundle:nil];
                    m_defaltType.isDefaultType = NO;
                    [self.navigationController pushViewController:m_defaltType animated:YES];
                    break;

                default :
                    ;
            }

            break;
        default :
            ;
    }


}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

}

//for section 0 中的滑动删除效果

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
    if( (0 == indexPath.section) && (indexPath.row != [m_URLArray count]) ){
       return UITableViewCellEditingStyleDelete;
    }else{
        return UITableViewCellEditingStyleNone;
    }
}

/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/

// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    //NSLog(@"commitEditingStyle");
    if (editingStyle == UITableViewCellEditingStyleDelete) {

        GFdataURL *currentURl ;
        currentURl = [[GFdataURL alloc] init];
        //currentURl = [m_URLArray objectAtIndex: indexPath.row];
        currentURl = [[m_URLArray objectAtIndex:indexPath.row] retain];

        GFDBC *mydatabase;
        mydatabase =[[GFDBC alloc] init];
        [mydatabase deleteURL:currentURl.m_strURL];
        [currentURl release];
        currentURl = nil;
        if(m_URLArray !=nil){
            [m_URLArray release];
            m_URLArray =[[NSMutableArray alloc] init];
        }
        m_URLArray = [[mydatabase getAllURL] retain];
        //
        [mydatabase release];
        //[m_tableView deleteRowsAtIndexPaths:indexPath.row withRowAnimation:UITableViewRowAnimationFade];
        //[tableView reloadData];
        //[self loadView];
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }
    else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }

}