How to auto scroll UIScrollView using timer?

Question

I have a UIScrollView to show images. I need a timer to show the images one after another, after every 5 seconds. How to initiate UIScrollView event to move to the next image after 5 seconds using the timer?

Answer 1

Add the variable int h to your interface, and yourScrollView as a property. Then:

[NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(onTimer) userInfo:nil repeats:YES];

- (void) onTimer {

    // Updates the variable h, adding 100 (put your own value here!)
    h += 100; 

    //This makes the scrollView scroll to the desired position  
    yourScrollView.contentOffset = CGPointMake(0, h);  

}

Answer 2

modifying the above code

 [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(onTimer)   userInfo:nil repeats:YES];

-(void) onTimer {
  // NSLog(@"content offset %f",scrollVw.contentOffset.y);
  if (scrollVw.contentOffset.y<MAX_ALLOWED_OFFSET) {
   //scroll to desire position
    scrollVw.contentOffset = CGPointMake(0, scrollVw.contentOffset.y+1);
  }


  }