如何在选择 UITableViewCell 行中传递值

Posted

技术标签:

【中文标题】如何在选择 UITableViewCell 行中传递值【英文标题】:How to pass value in select UITableViewCell Row 【发布时间】:2016-07-08 05:37:46 【问题描述】:

我有UITableViewCell,单元格索引类别明智并展开单元格单击标题,并通过 JSON 加载数据。我想选择单元格并将数据传递给另一个视图控制器。我尝试了很多次,但只传递数据第一个单元格。我单击了另一个单元格,因此此条件将数据传递给第一个单元格。无法发送特定的单元格数据。怎么可能。请帮忙。

-(void)connectionDidFinishLoading:(NSURLConnection *)connection

    NSError *error;

    NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves  error:&error];

    NSArray *statuses = [json objectForKey:@"status"];
    names=[[NSMutableArray alloc]initWithArray:[statuses valueForKey:@"business_category_name"]];
    business_details_array=[[NSMutableArray alloc]initWithArray:[statuses valueForKey:@"business_details"]];

    for (int i=0; i<[names count]; i++) 
        [arrayForBool addObject:[NSNumber numberWithBool:NO]];
    

    [self.tabel_view reloadData];


- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

     return names.count;


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

    if ([[arrayForBool objectAtIndex:section] boolValue]) 
        return [[business_details_array objectAtIndex:section] count];
    
    else
        return 0;


- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section

    return 70;


- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section


    UIView *sectionHeaderView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, tableView.frame.size.width,70)];

    sectionHeaderView.backgroundColor=[UIColor grayColor];

    sectionHeaderView.tag=section;

    UIView *sectionsubHeaderView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, tableView.frame.size.width,60)];

    sectionsubHeaderView.backgroundColor=[UIColor blueColor];

    UIImageView *arrow=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0,60, 60)];

    [arrow setImage:[UIImage imageNamed:@"arrow.png"]];

    UILabel *Lbl=[[UILabel alloc]initWithFrame:CGRectMake(60, 0,tableView.frame.size.width-60, 60)];

    Lbl.text=[names objectAtIndex:section];

    Lbl.textColor=[UIColor whiteColor];

    [sectionsubHeaderView addSubview:arrow];

    [sectionsubHeaderView addSubview:Lbl];

    [sectionHeaderView addSubview:sectionsubHeaderView];

    UITapGestureRecognizer  *headerTapped   = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(sectionHeaderTapped:)];

    [sectionHeaderView addGestureRecognizer:headerTapped];

    return  sectionHeaderView;


- (void)sectionHeaderTapped:(UITapGestureRecognizer *)gestureRecognizer


    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:gestureRecognizer.view.tag];
    if (indexPath.row == 0) 
        BOOL collapsed  = [[arrayForBool objectAtIndex:indexPath.section] boolValue];
        for (int i=0; i<[names count]; i++) 
            if (indexPath.section==i) 
                [arrayForBool replaceObjectAtIndex:i withObject:[NSNumber numberWithBool:!collapsed]];
            
        
        [self.tabel_view reloadSections:[NSIndexSet indexSetWithIndex:gestureRecognizer.view.tag] withRowAnimation:UITableViewRowAnimationAutomatic];

    


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

    MemberTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ht"];
    if (cell==nil)
    
        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"Cell" owner:self options:nil];
        cell = [nib objectAtIndex:0];
    

    NSString*title_str=[NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"name"] objectAtIndex:indexPath.row]];
    cell.title.text= title_str;
    [titles addObject:title_str];
    NSLog(@"get %@",titles);

    cell.email.text=[NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"email"] objectAtIndex:indexPath.row]];
    //[emailary addObject:cell.email.text];

    cell.address_lbl.text=[NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"address"] objectAtIndex:indexPath.row]];
    //[adrsary addObject:cell.address_lbl.text];

    cell.phone_lbl.text=[NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"phone"] objectAtIndex:indexPath.row]];
    // [phoneary addObject:cell.phone_lbl.text];

    cell.web_lbl.text=[NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"website"] objectAtIndex:indexPath.row]];
    //[websiteary addObject:cell.web_lbl.text];

    cell.sens_lbl.text=[NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"member_since"] objectAtIndex:indexPath.row]];
    //[sensary addObject:cell.sens_lbl.text];

    cell.des_lbl.text=[NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"des"] objectAtIndex:indexPath.row]];
    //[desary addObject:cell.des_lbl.text];

    NSData* imageData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString: [NSString stringWithFormat:@"%@",[[[business_details_array objectAtIndex:indexPath.section] valueForKey:@"img_url"] objectAtIndex:indexPath.row]]]];

    UIImage* image = [[UIImage alloc] initWithData:imageData];

    cell.image_view.image =image;
    //[images addObject:cell.image_view.image];

    return  cell;


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

    [arrayForBool replaceObjectAtIndex:indexPath.section withObject:[NSNumber numberWithBool:NO]];

    [self.tabel_view reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationAutomatic];



- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

    if ([segue.identifier isEqualToString:@"showRecipeDetail"])
    
        NSIndexPath *indexPath = [self.tabel_view indexPathForSelectedRow];
        member_details *destViewController = segue.destinationViewController;
        destViewController.hello = [titles objectAtIndex:indexPath.row];

    

【问题讨论】:

嗨,Kumawat 正在使用导航控制器来推送下一个视图吗? @KoushikGounder 是的,正确唱下一个视图控制器 所以您需要单击一个单元格,然后会出现一个更大的视图,其中包含该特定单元格的详细信息,我是否正确?如果我错了请纠正我以便我可以提供完美的解决方案 是的,你是对的 如果您在这里发现任何困难评论,请尝试我的答案 【参考方案1】:

由于您已直接从 tableview 加入 segue,因此这样做不是正确的方法。而不是你必须通过控制器加入到控制器中。因此,在获得正确选择的行索引之前,您的视图控制器会快速推送,并且您总是获得 0 索引。

您可以在UITablViewdidSelect 方法中执行相同的操作,而不是在prepareForSegue 中编写逻辑。

为此,您必须从情节提要中找到目标视图控制器。并将数据设置为所需的属性。

编辑

删除您的准备安全逻辑并在 didSelect 中执行此操作

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

     [arrayForBool replaceObjectAtIndex:indexPath.section withObject:[NSNumber numberWithBool:NO]];

     [self.tabel_view reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationAutomatic];

     UIStoryboard *storyboard = 
        [UIStoryboard storyboardWithName:@"MainStoryboard" 
                                  bundle:[NSBundle mainBundle]];
     YourDestinationVC *vc =[[storyboard instantiateViewControllerWithIdentifier:@"YourDestinationVC"]; //@"YourDestinationVC" is storyboardID for your destination view controller
     vc.hello = [titles objectAtIndex:indexPath.row];
     [[self navigationController] pushViewController:vc animated:YES];

这是截图:

【讨论】:

@A.Kumawat 也从情节提要中删除 segue。 Instedof 将 stroyboardID 提供给 viewcontroller。并在代码中使用这个storyboardID。 @A.Kumawat 如果您仍然遇到问题,请告诉我。 错误显示如下:- 不包含标识符为“YourDestinationVC”的视图控制器 @"YourDestinationVC" 是你的目标视图控制器的storyboardID 你必须用你的视图控制器替换它【参考方案2】:

您应该在视图控制器之间创建转场。

不要创建从单元到视图控制器的 segue。

那么你应该调用

[self performSegueWithIdentifier:@"showRecipeDetail" sender:self];

更新didSelectRowAtIndexPath中的表后

【讨论】:

我添加了这一行,但无法通过。怎么可能【参考方案3】:

试试这个删除准备prepareForSeguedidselectrowatindexpath添加。

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

    [arrayForBool replaceObjectAtIndex:indexPath.section withObject:[NSNumber numberWithBool:NO]];

    [self.tabel_view reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationAutomatic];

    member_details *destViewController = [[member_details alloc]init];
    destViewController.hello = [titles objectAtIndex:indexPath.row];

    [[self navigationController] pushViewController:destViewController animated:YES];

【讨论】:

在这个无标识符集中? 这是通过编程不使用故事板来实现的 照我说的在 tempVC.m 中创建一个视图控制器 (tempVC) ` -(void)viewDidLoad [super viewDidLoad]; [self.view setBackgroundColor:[UIColor greenColor]]; ` 在你的 tableviewcontrollers .h 文件中导入 tempVC 在你的 didselectrowatindex 路径中创建一个对象 -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath tempVC *destViewController = [[tempVC alloc]init]; [[self navigationController] pushViewController:destViewController 动画:YES]; 如果您在单击单元格后看到 greenColor,请发表评论 与您的代码相同,但无法传递数据。怎么可能请帮忙 你得到绿色视图了吗?【参考方案4】:

试试这个

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

    [self performSegueWithIdentifier:@"showRecipeDetail" sender:[YOUR_ARRAY objectAtIndex:indexPath.row]];


- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

    if ([segue.identifier isEqualToString:@"showRecipeDetail"])
    
        member_details *destViewController = segue.destinationViewController;
        destViewController.hello = sender;

    

【讨论】:

以上是关于如何在选择 UITableViewCell 行中传递值的主要内容,如果未能解决你的问题,请参考以下文章

在 UITableViewCell 中编辑 TextLabel [重复]

如何在单元格选择/取消选择时正确切换 UITableViewCell 的 accesoryType?

如何防止 UITableViewCell 在部分刷新时丢失其选择状态?

默认情况下如何选择 UITableViewCell?

如何在选择器中传递自定义 UITableViewCell

formContext Ribbon WorkBench 按钮中传上下文