为什么在player->show()时不播放声音

hanggr

player:layer(QWidget *parent, const char *name,WFlags f):QWidget(parent,name,f){

  inSoundTimer = new QTimer( this );              //inSoundTimer已在前面定义
  inSoundTimer->start( 10, TRUE );
  inSound = new QSound(QString("./sound/02.wav"));//目录正确,inSound已在前面定义
  inSound->setLoops(-1);
  connect( inSoundTimer, SIGNAL(timeout()), this, SLOT(inSoundSlot()) );
}

void Player::inSoundSlot(){
  inSound->play();
}