CODEWITHSUNDEEP
iosicarousel
Anna565
Anna565

Reputation: 735

iCarousel not smoothly

I'm using iCarousel to have a scroll of images. THe code is: 

- (CATransform3D)carousel:(iCarousel *)_carousel itemTransformForOffset:(CGFloat)offset baseTransform:(CATransform3D)transform 
{
    CGFloat count = 5; 
    CGFloat spacing = 0.9f; 
    CGFloat arc = M_PI * 0.3f; 
    CGFloat radius = fmaxf(140.0 * spacing / 2.0f, 140.0 * spacing / 2.0f / tanf(arc/2.0f/count));
    CGFloat angle = offset / count * arc;
    radius = -radius;
    angle = -angle;
    transform = CATransform3DTranslate(transform, radius * sin(angle),radius * cos(angle) - radius, 0.0f);                    
    return transform;                                                    
 }

But when I scroll the images there is an ugly effect, the transition is not smooth and the images comes out in a jerky way, but I'd like to come out smootly. Can you help me? Thanks.

Edit: The problem is that when I scroll the images the transition is not smooth and the images comes out in front of the images on the back with a detachment from the other images. Pratically, the images comes in front of the others only when the scrolling did end and this causes a bad effect.

Upvotes: 1

Views: 1093

Answers (1)

ebandersen
ebandersen

Reputation: 2352

We had a similar issue in our last implementation of iCarousel. Here's how we fixed it:

- (CGFloat)carousel:(iCarousel *)carousel valueForOption:(iCarouselOption)option withDefault:(CGFloat)value {

    if (option == iCarouselOptionSpacing) {
    return value;// * 1.05f;
    } else if(option == iCarouselOptionWrap) {
    return NO;
    } else if(option == iCarouselOptionVisibleItems) {
    return 3;
    }
    return value;
}

Specifically, what you're probably needing is that last else if statement where we specify the number of visible items. It defaults to 1 which means that as you swipe through the new images come out in a jerky way. By specifying 3, you guarantee that the most previous item, the current item, and the next item are always loaded in memory so scrolling between them is always smooth. If this doesn't solve your problem, increase the number 3 to whatever works.

Also, don't forget to set the delegate of the iCarousel to self.

Best of luck.

Upvotes: 4

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