Autoscrolling infinite effect in .linear type of i

问题:

I need infinite autoscrolling effect in .linear type in iCarousel and i already achieve autoscrolling in .cylinder type but i can't achieve this effect in .linear type.

Here is my code of achieve autoscrolling in .cylinder type

carousel.type = .linear

carousel.autoscroll = -0.4;

carousel.reloadData()

回答1:

Yes, this does not work carousel.type = .linear in the case of linear so you have to make an own timer for scrolling just like that:

self.timer = NSTimer.scheduledTimerWithTimeInterval(6, target: self, selector: #selector(self.handleTimer), userInfo: nil, repeats: true)

func handleTimer(){

    if itemsScroll.count != 0{
        if itemsScroll.count-1 == index{
           index = 0           
        }
        else {
           index += 1
        }
    }
    let x = CGFloat(index)
    if index == 0 {
       carousel.scrollToOffset(x, duration: 0)
    }
    else {
       carousel.scrollToOffset(x, duration: 2)
    }
}

The index is used to get the current data for the carousel data source.

回答2:

Thanks @salman for an answer with the help of Salman's answer I got a solution for an infinite solution without jerking issue when carousel type is linear

Please follow the steps given below.

1. Define timer for handle scrolling

_ = Timer.scheduledTimer(timeInterval: 4, target: self, selector: #selector(self.handleTimer), userInfo: nil, repeats: true)

2. Write the delegate method of the carousel and handle wrap type with the help of wrap we solve jerk issue.

    func carousel(_ carousel: iCarousel, valueFor option: iCarouselOption, withDefault value: CGFloat) -> CGFloat {
        switch option {
        case .wrap:
            return 1
        default:
            return value
        }
    }

3. Method to handle scrolling

    func handleTimer() {
        var newIndex = self.carousel.currentItemIndex + 1

        if newIndex > self.carousel.numberOfItems {
            newIndex = 0
        }

        carousel.scrollToItem(at: newIndex, duration: 0.5)
    }