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POsmooth scrolling of imageview
 

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  1. POsmooth scrolling of imageview
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    <p>I have added the images to scrollview dynamically. Following is the code:</p> <pre><code>-(void)displayimages { for (int i=0; i&lt;[featuredarray count]; i++) { NSString *image=[[featuredarray objectAtIndex:i]objectForKey:@"img"]; if (i==0) { webview=[[UIImageView alloc]initWithFrame:CGRectMake(i*290+15, 0, 270, 380)]; } else { webview=[[UIImageView alloc]initWithFrame:CGRectMake(i*290+15, 0, 270, 380)]; } webview.backgroundColor=[UIColor clearColor]; webview.layer.borderWidth=4; webview.layer.cornerRadius=4; webview.layer.borderColor=[[UIColor whiteColor]CGColor]; [webview setTag:i]; webview.userInteractionEnabled=YES; NSURL *url = [NSURL URLWithString:image]; [webview setImageWithURL:url placeholderImage:[UIImage imageNamed:@"placeholder.png"]]; [scroll addSubview:webview]; UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handlefirstTap:)]; tap1.delegate=self; tap1.numberOfTapsRequired=1; [webview addGestureRecognizer:tap1]; [tap1 release]; [webview release]; } pages.defersCurrentPageDisplay=YES; scroll.delegate =self; scroll.contentSize = CGSizeMake(290*[featuredarray count],300); scroll.pagingEnabled = YES; pages.numberOfPages = [featuredarray count]-1; pages.currentPage =0; } -(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{ int gallerypage = scrollView.contentOffset.x /scrollView.frame.size.width; CGRect frame = scroll.frame; frame.origin.x = frame.size.width-15*gallerypage; NSLog(@"frame.origin.x..%f",frame.origin.x); frame.origin.y =0; [scroll scrollRectToVisible:frame animated:YES]; } -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { int gallerypage = scrollView.contentOffset.x /scrollView.frame.size.width; CGRect frame = scroll.frame; frame.origin.x=gallerypage*290; frame.origin.y =0; [scroll scrollRectToVisible:frame animated:YES]; } </code></pre> <p>It is showing the images well when I use pagecontroller action </p> <pre><code>-(IBAction)pagecontrolaction:(id)sender { int page = pages.currentPage; CGRect frame = scroll.frame; frame.origin.x=page*290; frame.origin.y =0; [scroll scrollRectToVisible:frame animated:YES]; } </code></pre> <p>but when I used touch event to imageview then it is not displaying the images smoothly. It gets stuck during scrolling.</p> <p><img src="https://i.stack.imgur.com/UrjI3.png" alt=""> </p> <p>These are the preview which shows the current image with the start of second image.</p>
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    1. COWhat does “It gets stuck” mean? Does your app hang? Does it pause for a fraction of a second and then resume scrolling? Does it just stop with the new image partially on the screen when you lift your finger, instead of scrolling the new image entirely onto the screen?
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      1. USrob mayoff
    2. COset webview frame like my answer
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      1. USBhavesh Nayi
    3. COIt pause for a fraction and then scrolled @robmayoff
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      1. USMinkle Garg
 

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