uiTableviewcell 中未调用 UicollectionView didSelectItemAtIndexPath

Posted 2023-02-27

【中文标题】uiTableviewcell 中未调用 UicollectionView didSelectItemAtIndexPath

【英文标题】：UicollectionView didSelectItemAtIndexPath is not called in uiTableviewcell

【发布时间】：2016-03-10 10:31:59

【问题描述】：

我正在处理聊天视图。为此，我使用了此代码：Chat Code 这工作正常。现在我在 UItableViewCell 中使用了 UIcollectionView。集合视图工作正常。但问题是没有调用 UICollectionView 和 UITableView 的 didselect 方法。请帮我。我非常需要你的帮助。

我在 UITableViewCell 类中使用过这段代码：

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier 
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) 
        self.backgroundColor = [UIColor clearColor];
        if ([[UIDevice currentDevice].systemVersion floatValue] < 7.0f) 
            self.textLabel.backgroundColor = [UIColor whiteColor];
        
        self.textLabel.font = [UIFont systemFontOfSize:14.0f];
        self.textLabel.lineBreakMode = NSLineBreakByWordWrapping;
        self.textLabel.numberOfLines = 0;
        self.textLabel.textAlignment = NSTextAlignmentLeft;
        self.textLabel.textColor = [UIColor blackColor];

        _timestampLabel = [[UILabel alloc] init];
        _timestampLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
        _timestampLabel.textAlignment = NSTextAlignmentCenter;
        _timestampLabel.backgroundColor = [UIColor clearColor];
        _timestampLabel.font = [UIFont systemFontOfSize:12.0f];
        _timestampLabel.textColor = [UIColor colorWithRed:0.4 green:0.4 blue:0.4 alpha:1.0];
        _timestampLabel.frame = CGRectMake(0.0f, 12, self.bounds.size.width, 18);

        [self.contentView addSubview:_timestampLabel];

        messageBackgroundView = [[UIImageView alloc] initWithFrame:self.textLabel.frame];

        [self.contentView insertSubview:messageBackgroundView belowSubview:self.textLabel];

        self.AvatarImageView = [[UIImageView alloc] initWithFrame:CGRectMake(5,10+TOP_MARGIN, 50, 50)];

        [self.contentView addSubview:self.AvatarImageView];

        CALayer * l = [self.AvatarImageView layer];
        [l setMasksToBounds:YES];
        [l setCornerRadius:self.AvatarImageView.frame.size.width/2.0];

        self.selectionStyle = UITableViewCellSelectionStyleNone;

        UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
        layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;

        self.collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout];
        [self.collectionView registerNib:[UINib nibWithNibName:@"ImageCollection" bundle:nil] forCellWithReuseIdentifier:@"Cell"];

        [self.collectionView setUserInteractionEnabled:YES];
        self.collectionView.backgroundColor = [UIColor clearColor];
        [self.contentView addSubview:self.collectionView];
        [messageBackgroundView setUserInteractionEnabled:YES];
        [self.contentView setUserInteractionEnabled:YES];
         //        UITapGestureRecognizer *lpgr //        = [[UITapGestureRecognizer alloc] //           initWithTarget:self action:@selector(tapRecognized:)]; //        lpgr.numberOfTapsRequired
= 1; //        lpgr.delegate = self; //        [self.collectionView addGestureRecognizer:lpgr];
    
    [self setUserInteractionEnabled:YES];

    return self; 

在 UIViewController 中，我在 tableView cellForRowAtIndexPath 中使用了这段代码：

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

    static NSString *L_CellIdentifier = @"SPHTextBubbleCell";
   self.documentsArray = [[NSMutableArray alloc]init];
        self.documentsArray = [[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"Attachments"];


        SPHTextBubbleCell *cell =  [tableView dequeueReusableCellWithIdentifier:L_CellIdentifier];
        cell.userInteractionEnabled = YES;
        if (cell == nil)
        
            cell = [[SPHTextBubbleCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:L_CellIdentifier];
        
       // cell.bubbletype=(([[[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"MessageFromId"]intValue] == 1))?@"LEFT":@"RIGHT";

        if ([[[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"MessageFromId"]intValue] == 1) 

            cell.bubbletype = @"RIGHT";
        
        else
        
            cell.bubbletype = @"LEFT";

        

        [cell setBackgroundColor:[UIColor clearColor]];
        cell.textLabel.text = [[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"Content"];
        cell.textLabel.tag=indexPath.row;
        NSString *dateString = [NSString stringWithFormat:@"%@",[self mfDateFromDotNetJSON:[[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"UpdatedOn"]]];
        NSLog(@"dateString..%@",dateString);
        NSString *myString = [NSString stringWithFormat:@"%@",dateString];
        NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
        dateFormatter.dateFormat = @"yyyy-MM-dd HH:mm:ss ZZZ";
        NSDate *yourDate = [dateFormatter dateFromString:myString];
        //                    NSTimeZone *utc = [NSTimeZone timeZoneWithAbbreviation:@"UTC"];
        //                    [dateFormatter setTimeZone:utc];
        dateFormatter.dateFormat = @"dd-MMM-yy HH:mm";
        NSString *newString = [dateFormatter stringFromDate:yourDate];
        NSLog(@"newString..%@",newString);

        if ([self.documentsArray count]!=0)
        
            cell.CustomDelegate = self;

            [cell.collectionView setUserInteractionEnabled:YES];
            [cell.collectionView setDelegate:self];
            [cell.collectionView setDataSource:self];
            cell.collectionView.delegate =self;
            cell.collectionView.dataSource = self;
            [cell.collectionView reloadData];

            [cell.collectionView setHidden:NO];
            [cell.collectionView setBackgroundColor:[UIColor clearColor]];

        
        else
        
            [cell.collectionView setHidden:YES];
        
        cell.collectionView.tag =indexPath.row;
        cell.timestampLabel.text = newString;
        [cell.AvatarImageView sd_setImageWithURL:([[[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"MessageFromId"]intValue] == 1)?[NSURL URLWithString:[NSString stringWithFormat:@"%@%@",imageURLLive,[[[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"SellerPicture"] valueForKey:@"PictureUrl"]]]:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@",imageURLLive,[[[self.messagesArray objectAtIndex:indexPath.row]valueForKey:@"BuyerPicture"] valueForKey:@"PictureUrl"]]]
                                placeholderImage:[UIImage imageNamed:@"Nav-profile1.png"]];




        return cell;

提前致谢。

【问题讨论】：

请将 Delegate 和 DataSource 添加到您的视图控制器。

我已经加了:(

请您发布一些代码。所以我会帮你解决问题。

当然.... 我在 UITableViewCell 中创建了 UICollectionView

我建议你不要在复杂的应用程序中使用第三方库。

【参考方案1】：

如果您的问题是您的 UICollectionView 轻按不会导致它所在的 UITableViewCell 被选中，那么您可以通过继承 UICollectionView 并根据自己的喜好修改 hitTest 函数来绕过此问题。

See my answer here.

这个可以让你点击集合视图项目之外的任何东西来选择表格单元格，但集合视图项目本身会阻止点击并根据需要处理它们。

【参考方案2】：

修改hitTest 方法在我的情况下不起作用。我决定使用UITapGestureRecognizer。

// Custom UITableViewCell

override func awakeFromNib() 
    super.awakeFromNib()

    let tapGR = UITapGestureRecognizer(target: self, action: #selector(collectionViewTapped(_:)))
    tapGR.numberOfTapsRequired = 1
    self.collectionView.addGestureRecognizer(tapGR)


func collectionViewTapped(gr: UITapGestureRecognizer) 
    let point = gr.locationInView(self.collectionView)
    if let indexPath = self.collectionView.indexPathForItemAtPoint(point) 
        // Do stuff
    

【参考方案3】：

别忘了设置委托和数据源。

self.tableView.delegate = self;
self.tableView.dataSource = self;

【讨论】：

我已经设置了委托和数据源:(

也许 self.tableView.allowsSelection = YES;和 self.collectionView.allowsSelection = YES;