ScrollView set contentOffset
such setting is sometimes inaccurate, there is a little offset
[self.scrollView setContentOffset:CGPointMake(width, 0)];
This setting will be accurate, but sometimes we don’t need animation
[scrollView setContentOffset:CGPointMake(width, 0) animated:YES];
Therefore, this setting is accurate and without animation, perfect!
[self.scrollView setContentOffset:CGPointMake(width, 0) animated:NO];