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POScrollView with large images scrolls too slowly
 

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  1. POScrollView with large images scrolls too slowly
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    <p>When I am scrolling images frequently in a UIScrollView then after some images, the next image takes time to load... it's not taking too much time but looks odd.</p> <p>Suppose I have 27 images in a scrollView. When I start to scroll these images, for 1 or 2 images it scrolls smoothly but when I scroll again to see the 3rd image it takes time to load. Then when I start the images scrolling again from the 3rd image, it behaves like before.</p> <p>I can't load all 27 images at a time or my app crashes.</p> <p>When I <em>slowly</em> scroll the scrollview then I don't have this problem.</p> <p>My code is below:</p> <pre><code>//Taking image view for 27 images; int x=0; for(int i = 1; i&lt;=27; i++) { imageView = [[UIImageView alloc] init]; imageView .frame = CGRectMake(x,0,768,1024); imageView.tag=i; imageView.image=nil; imageView.userInteractionEnabled=YES; [contentView addSubview:imageView]; x+=768; } //setContentOffset of the scrollView --&gt;ContentView [contentView setContentOffset: CGPointMake((imageNumber-1)*768, 0) animated: YES]; //desire image which i want to see from the start of the scrollview pageNumber=imageNumber; int pageBefore=pageNumber-1; int pageAfter=pageNumber+1; //Views for image for( UIImageView * views in [contentView subviews]){ if(views.tag==pageNumber){ if(views.image==nil){ NSLog(@"entering"); views.image=[UIImage imageNamed:[ NSString stringWithFormat:@"%d.jpg",pageNumber]]; [views.image release]; } } if(views.tag==pageBefore){ if(views.image==nil){ views.image=[UIImage imageNamed:[ NSString stringWithFormat:@"%d.jpg",pageBefore]]; [views.image release]; } } if(views.tag==pageAfter){ if(views.image==nil){ views.image=[UIImage imageNamed:[ NSString stringWithFormat:@"%d.jpg",pageAfter]]; [views.image release]; } } </code></pre>
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    1. USJeff Atwood
    1. USYamen Emon
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