ios - 如何更改 Objective-C 中 UITableViewCell 中先前按下的 UIButton 标签？

Question

我有一个带有一个按钮(用于播放/暂停)和两个文本字段的表格 View 。单击单元格 1 的播放时..按钮文本正在播放并且正在播放歌曲。

但我想在单击 cell2 或任何其他单元格时将按钮文本从播放更改为暂停。

按下标有“播放”的按钮后，它会变为“暂停”并播放音频，如果在其他单元格中按下另一个按钮，则前一个单元格按钮应将其标签更改为“播放”。

这意味着我想根据我们在音乐播放器上看到的播放/暂停更改按钮文本/图像。请帮忙

这是我写的。请告诉我下一步该怎么做:

block 引用

========更新后的答案:

- (IBAction)playCallBack:(id)sender { 
    UIButton *clickedBtn = (UIButton*)sender;
    NSIndexPath *indexPath =[self.tableView indexPathForCell: 
   (UITableViewCell *)[[sender superview] superview]];
    NSLog(@"indexpath %ld",(long)indexPath.row);


if (_playBtn != nil && _playBtn != (UIButton*)sender) {
    [_playBtn setTitle:@"Play" forState:UIControlStateNormal];   
     }
    if (!player)
    {

    NSString *path=[[NSBundle mainBundle] 
    pathForResource:@"iphone_6_original" ofType:@"mp3"];  
    NSURL *url=[NSURL URLWithString:path];  
    player=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:NULL];  
   [player setDelegate:self];
   [player prepareToPlay];
   }

    if(_playBtn == clickedBtn)
   {
    if ([player isPlaying])
    {
    [clickedBtn setTitle:@"Play" forState:UIControlStateNormal];
    [player pause];
    }

else
    {
    [clickedBtn setTitle:@"Pause" forState:UIControlStateNormal];
    [player play];            
   }
   }

else
    {
    if ([player isPlaying]) {
    player.currentTime = 0;
    [player play];
    [clickedBtn setTitle:@"Pause" forState:UIControlStateNormal];
    }

else{
   [player play];
   [clickedBtn setTitle:@"Pause" forState:UIControlStateNormal];
   }
   }
   _playBtn = (UIButton*)sender;
   [_tableView reloadData];    
    }

Answer 1

- (IBAction)playCallBack:(id)sender {

    NSIndexPath *indexPath =[self.tableView indexPathForCell:(UITableViewCell *)[[sender superview] superview]];
    NSLog(@"indexpath %ld",(long)indexPath.row);

    if (!player)
    {

        NSString *path=[[NSBundle mainBundle] pathForResource:@"iphone_6_original" ofType:@"mp3"];
        NSURL *url=[NSURL URLWithString:path];
        player=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:NULL];
        [player setDelegate:self];
        [player prepareToPlay];

    }
    if (![player isPlaying])
    {
        [sender setTitle:@"Play" forState:UIControlStateNormal];
        [player play];
    }
    else
    {
        [player pause];
        [sender setTitle:@"Pause" forState:UIControlStateNormal];
    }

[tableview reloadData];
}

如果您在按下按钮时重新加载。然后获取当前索引

  - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        static NSString *tableViewIdentifier=@"cell";
        TableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:tableViewIdentifier];

        if (cell==nil)
        {
            cell=[[TableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:tableViewIdentifier];
        }

        cell.musicName.text=[musicList objectAtIndex:indexPath.row];
        cell.singer.text=[singerList objectAtIndex:indexPath.row];
        cell.duration.text=[durationList objectAtIndex:indexPath.row];
    if(currentIndex==indexpath.row)
         {
//do
           }
        else
       {
        //or change anything
         }
        [cell.playBtn addTarget:self action:@selector(playCallBack:) forControlEvents:UIControlEventTouchUpInside];

        return  cell;
    }