Scrolling images by dragging UISlider - objective-c

Question

Iam beginner in IOS Dev. asking about a way to make UIScrollView images scrolls by dragging UISlider . This is my case :
Required case :
when dragging slider , images scrolls on UIScrollView . also when scrolling images , slider changes its value accordingly .
Actual case :
when scrolling images , slider changes its value accordingly BUT when dragging slider images DONOT Scroll .
Here is my code , I wish any one tell me how to scrolling when slider drags .
Slider IBAction
- (IBAction)sliding:(UISlider *)sender{
int slider_value = (int)slider.value;
NSString *current_page = [[NSString alloc] initWithFormat:#"%i",slider_value];
current_page_lbl.text = current_page ;
[self loadPage:slider_value];
[self loadVisiblePages];
}
methods for UIScrollview :
- (void)loadPage:(NSInteger)page {
if (page < 0 || page >= self.pageImages.count) {
return;
}
UIView *pageView = [self.pageViews objectAtIndex:page];
if ((NSNull*)pageView == [NSNull null]) {
CGRect frame = self.scrollView.bounds;
frame.origin.x = frame.size.width * page;
frame.origin.y = 0.0f;
UIImageView *newPageView = [[UIImageView alloc] initWithImage:[self.pageImages objectAtIndex:page]];
newPageView.contentMode = UIViewContentModeScaleAspectFit;
newPageView.frame = frame;
[self.scrollView addSubview:newPageView];
[self.pageViews replaceObjectAtIndex:page withObject:newPageView];
}
}
- (void)purgePage:(NSInteger)page {
if (page < 0 || page >= self.pageImages.count) {
// If it's outside the range of what you have to display, then do nothing
return;
}
UIView *pageView = [self.pageViews objectAtIndex:page];
if ((NSNull*)pageView != [NSNull null]) {
[pageView removeFromSuperview];
[self.pageViews replaceObjectAtIndex:page withObject:[NSNull null]];
}
}
To loadVisiblePage
- (void)loadVisiblePages {
CGFloat pageWidth = self.scrollView.frame.size.width;
NSInteger page = (NSInteger)floor((self.scrollView.contentOffset.x * 2.0f + pageWidth) / (pageWidth * 2.0f));
NSLog(#"page loaded is %d",page);
self.pageControl.currentPage = page;
NSInteger firstPage = page - 1;
NSInteger lastPage = page + 1;
for (NSInteger i=0; i<firstPage; i++) {
[self purgePage:i];
}
for (NSInteger i=firstPage; i<=lastPage; i++) {
[self loadPage:i];
slider.value = 21-i ;
int slider_value = (int)slider.value;
NSString *current_page = [[NSString alloc] initWithFormat:#"%i",21-slider_value];
current_page_lbl.text = current_page ;
}
for (NSInteger i=lastPage+1; i<self.pageImages.count; i++) {
[self purgePage:i];
}
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
[self loadVisiblePages];
}

Answer 1

uislider is not suitable to use with uiscrollview....for this purpose there is one controll available name UIPagecontrol..
following link is the nice example with code which direct you to how to use it with UIScollview
UIPagecontroll with UIscollview with code Click Here