Question

我有一个带有一个按钮（用于播放/暂停）的桌面视图，其中包含两个文本字段。点击播放单元格1时，按钮文字播放，正在播放歌曲。

但是我想在点击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该将其标签更改为“播放”。

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

我写过这个。请让我下一步做什么：

块引用

========更新的答案：

- (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];
}

如果在按下按钮时重新加载。然后获得当前索引

  - (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;
    }

Answer 2

- (IBAction)buttonClicked:(id)sender {
yourButton.backgroundColor = [UIColor blackColor];
}

Answer 3

制作新的UIButton

@property (strong, nonatomic) UIButton *currentButton;

然后在行动方法

- (IBAction)playCallBack:(id)sender {

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

    UIButton *clickedBtn = (UIButton*)sender;

    if (self.currentButton != nil && self.currentButton != clickedBtn) {
        [self.currentButton 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(self.currentButton == clickedBtn){
        if ([player isPlaying])
        {
            [sender setTitle:@"Play" forState:UIControlStateNormal];
            [player pause];
        }
        else
        {
            [player play];
            [sender setTitle:@"Pause" forState:UIControlStateNormal];
        }
    }else{
        if ([player isPlaying]) {
            [player pause];
        }

        player.currentTime = 0;
        [player play];
    }

    self.currentButton = (UIButton*)sender;
}

像这样，您可以维护以前的点击按钮，并在点击其他按钮时根据您的要求进行更改

如何更改OBJECTIVE C中UITableViewCell中先前按下的UIButton标签？

3 个答案: