如何“重置”下一个indexPath.row成为当前的indexPath.row？

Question

 -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

self.selectedTrack = self.SPTrackList[indexPath.row];
self.selectedTrackRow = indexPath.row;

self.nextTrack = self.SPTrackList[indexPath.row +1];

[self playTrack:self.selectedTrack];

}

嗨 - 我怎样才能＆＃34;重置＆＃34; self.nextTrack成为self.selectedTrack？我已经尝试过self.nextTrack = self.selectedTrack，但这只会工作一次。我猜我需要遍历 - 如果那是正确的话 - 并且将self.selectedTrack和self.nextTrack的indexPath向前移动？

- (IBAction)nextPressd:(id)sender {
[self playTrack:self.nextTrack];

//self.nextTrack now be new self.selectedTrack via indexPath.row??

  }

谢谢！

Answer 1

如果您需要播放阵列中的下一首曲目，则需要跟踪当前播放曲目和该索引。你可以这样做：

- (IBAction)nextPressd:(id)sender
{
   self.selectedTrackRow += 1;
   self.nextTrack = self.SPTrackList[self.selectedTrackRow];
   [self playTrack:self.nextTrack];
}