当点击单元格上的按钮时，将信息写入单元格中

Posted 2023-03-11

【中文标题】当点击单元格上的按钮时，将信息写入单元格中

【英文标题】：Take Information Writter In A Cell When Button On A Cell Tapped

【发布时间】：2019-10-20 09:31:52

【问题描述】：

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

    static NSString *cellId = @"cell";
    CustomTableViewCell *cell = (CustomTableViewCell*)[tableView dequeueReusableCellWithIdentifier:cellId];

    if (cell == nil)
    
        cell = [[CustomTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellId];
    

    self.likeBtn = [[UIButton alloc] initWithFrame:CGRectMake(10, cell.frame.origin.y+100, 80, 20)];
    [self.likeBtn  setTitle:@"beğen" forState:UIControlStateNormal];
    self.likeBtn.backgroundColor = [UIColor blackColor];
    [cell addSubview:likeBtn];

    cell.titleLabel.text = [dataArr[indexPath.row] objectForKey:@"title"];
    cell.infoLabel.text = [dataArr[indexPath.row] objectForKey:@"description"];
    likeBtn.tag = indexPath.row;
    //NSLog(@"tag %d", likeBtn.tag);
    [likeBtn addTarget:self action:@selector(likeBtnTapped:) forControlEvents:UIControlEventTouchUpInside];

    return cell;

- (void) likeBtnTapped:(id)sender 
    NSLog(@"Like Button Tapped");
    NSLog(@"tag %d", likeBtn.tag);

    likeDataArray = [[NSMutableArray alloc] init];

        [[[self.ref child:@"user"] child:[FIRAuth auth].currentUser.uid] observeSingleEventOfType:FIRDataEventTypeValue withBlock:^(FIRDataSnapshot * _Nonnull snapshot) 
            if(snapshot.exists)
                self->likeDataArray = snapshot.value[@"liked"];
                NSLog(@"logged: %@", self->likeDataArray);
            


         withCancelBlock:^(NSError * _Nonnull error) 
            NSLog(@"%@", error.localizedDescription);

        ];

这是我的代码。我在每个单元格上都有一个赞按钮。当点击按钮时，我想获取单元信息并写入 Firebase 数据库。 我尝试为每个喜欢的按钮定义一个标签，但如果有 8 个按钮（或单元格），例如它将所有按钮标签定义为 8。 有没有办法做到这一点？

【参考方案1】：

使用 sender.tag 而不是 likeBtn。

- (void) likeBtnTapped:(UIButton *)sender 
    NSLog(@"Like Button Tapped");
    NSLog(@"tag %d", sender.tag);

    likeDataArray = [[NSMutableArray alloc] init];

        [[[self.ref child:@"user"] child:[FIRAuth auth].currentUser.uid] observeSingleEventOfType:FIRDataEventTypeValue withBlock:^(FIRDataSnapshot * _Nonnull snapshot) 
            if(snapshot.exists)
                self->likeDataArray = snapshot.value[@"liked"];
                NSLog(@"logged: %@", self->likeDataArray);
            


         withCancelBlock:^(NSError * _Nonnull error) 
            NSLog(@"%@", error.localizedDescription);

        ];

或更改 cellForRowAtIndexPath 方法

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

    static NSString *cellId = @"cell";
    CustomTableViewCell *cell = (CustomTableViewCell*)[tableView dequeueReusableCellWithIdentifier:cellId];

    if (cell == nil)
    
        cell = [[CustomTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellId];
    

    UIButton *likeButton  = [[UIButton alloc] initWithFrame:CGRectMake(10, cell.frame.origin.y+100, 80, 20)];
    [likeButton setTitle:@"beğen" forState:UIControlStateNormal];
    self.likeBtn.backgroundColor = [UIColor blackColor];
    [cell addSubview:likeButton];

    cell.titleLabel.text = [dataArr[indexPath.row] objectForKey:@"title"];
    cell.infoLabel.text = [dataArr[indexPath.row] objectForKey:@"description"];
    likeButton.tag = indexPath.row;
    [likeButton addTarget:self action:@selector(likeBtnTapped:) forControlEvents:UIControlEventTouchUpInside];

    return cell;