I want to update an `UISlider` according to a `notification` generated by another singleton class.

```
sondDuration=audioPlayer.currentItem.asset.duration;
songDurationinSeconds=CMTimeGetSeconds(sondDuration);
[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateTime:) userInfo:nil repeats:YES];

```

This is my notofication generation.

According to this how I can update my `UISlider` in another `ViewController` Please help me.