Question

我有一个tableview，其中包含自定义tableview cells，每个自定义UIView位于中心。我的tableview有一个array，其中包含每个都带有AVAsset字典的字典和其他一些数据。我UIView中的tableView cell是一个自定义类，用于绘制资源的波形。我可以显示波形，但每次向阵列添加新资源并转到tableview时，前一行中的UIView消失，只留下最新行中的新波形。无法弄清楚为什么会这样。

表格查看方法：

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

    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"audioTableCell" owner:self options:nil];
    OSAudioTableCell *cell = [nib objectAtIndex:0];

    cell.selectionStyle = UITableViewCellSelectionStyleNone;

    //Dictionary with data
    NSDictionary * packageInArray = [self.audioTableArray objectAtIndex:indexPath.row];

    cell.userName.text = [packageInArray objectForKey:@"userName"];
    cell.profilePicture.image = [UIImage imageWithData:[packageInArray objectForKey:@"profileImageData"]];

    //UIView related
    [cell setProgress:0]; //This sets timer to 0
    [cell setAsset:[packageInArray objectForKey:@"asset"]];  //This sets the asset
    [cell.waveView setBackgroundColor:[UIColor clearColor]];

    //NON related to UIView
    CALayer *imageLayer = cell.profilePicture.layer;
    [imageLayer setCornerRadius:20];
    imageLayer.borderColor = (__bridge CGColorRef)([UIColor grayColor]);
    [imageLayer setMasksToBounds:YES];    

    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    //When row is selected, the color of the UIView changes, this requires progress and the asset to be set again
    NSDictionary * packageInArray = [self.audioTableArray objectAtIndex:indexPath.row];

    //UIView related
    [((OSAudioTableCell*)[audioTable cellForRowAtIndexPath:indexPath]) setProgress:0];
    [((OSAudioTableCell*)[audioTable cellForRowAtIndexPath:indexPath]) setAsset:[packageInArray objectForKey:@"asset"]];
    [((OSAudioTableCell*)[audioTable cellForRowAtIndexPath:indexPath]) rowSelected:[packageInArray objectForKey:@"audioData"]];

}

TableView Cell方法：

//Custom method that is called when the row is selected and commands audio player to play
-(void) rowSelected: (NSData*) data
{

    [[OSTablePlayerController getInstance] playAudio:data];

    self.timer = [NSTimer scheduledTimerWithTimeInterval:.0001 target:self selector:@selector(updateProgress:) userInfo:nil repeats:YES];

}

//monitors the progress of the player and draws the different colored UIView
- (void)updateProgress:(NSTimer *)timer {


    NSTimeInterval playTime = [[OSTablePlayerController getInstance] currentTime];
    NSTimeInterval duration = [[OSTablePlayerController getInstance] duration];


    float progress = playTime/duration;    

    //Draws new UIView based on progress
    [self.waveView setProgress:progress];

    if(!([OSTablePlayerController getInstance].player.playing))
    {
        [self audioPlayerDidFinishPlaying:[OSTablePlayerController getInstance].player successfully:YES];
    }

}

Answer 1

行数可能无法更新。你试过吗

[yourTableView reloadData];

将新数据添加到阵列后？

tableViewCell中的UIView消失了

1 个答案: