嗨,我在我的应用程序中使用PageController
。
我已经在scrollView
上插入了所有数据。
我想要做的是,我想像特定时间的页面控制一样自动移动scrollview
。
当scrollView
到达最后一页时,它再次快速调用所有页面并从第一个开始。
我想在最后一页完成后非常顺利地加载/获取第一页。
找到我的代码如下。
var slides:[Slide] = [];
var offSet: CGFloat = 0
override func viewDidLoad() {
super.viewDidLoad()
slides = createSlides()
setupSlideScrollView(slides: slides)
pageControl.numberOfPages = slides.count
pageControl.currentPage = 0
view.bringSubview(toFront: pageControl)
let timer = Timer.scheduledTimer(timeInterval: 3, target: self, selector: #selector(autoScroll), userInfo: nil, repeats: true)
}
@objc func autoScroll() {
let totalPossibleOffset = CGFloat(slides.count - 1) * self.view.bounds.size.width
if offSet == totalPossibleOffset {
offSet = 0 // come back to the first image after the last image
}
else {
offSet += self.view.bounds.size.width
}
DispatchQueue.main.async() {
UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions.curveLinear, animations: {
self.scrollView.contentOffset.x = CGFloat(self.offSet)
}, completion: nil)
}
}
@objc func autoScroll() {
let totalPossibleOffset = CGFloat(slides.count - 1) * self.view.bounds.size.width
if offSet == totalPossibleOffset {
offSet = 0 // come back to the first image after the last image
}
else {
offSet += self.view.bounds.size.width
}
DispatchQueue.main.async() {
UIView.animate(withDuration: 0.1, delay: 0, options: UIView.AnimationOptions.curveLinear, animations: {
self.scrollView.scroll(topOffset:offSet, animated: true)
}, completion: nil)
}
}
extension UIScrollView {
// Bonus: Scroll
func scroll(topOffset:Float, animated: Bool) {
let ofSetValue = CGPoint(x: topOffset, y: 0)
setContentOffset(ofSetValue, animated: animated)
}
}
使用以下代码正常工作。
@objc func autoScroll() {
let totalPossibleOffset = CGFloat(slides.count - 1) * self.view.bounds.size.width
if offSet == totalPossibleOffset {
offSet = 0 // come back to the first image after the last image
}
else {
offSet += self.view.bounds.size.width
}
DispatchQueue.main.async() {
UIView.animate(withDuration: 0.0, delay: 0, options: UIViewAnimationOptions.curveLinear, animations: {
self.scrollView.contentOffset.x = CGFloat(self.offSet)
}, completion: nil)
}
}