[英]Scroll view with page control to display images in iOS
答案有點晚了。 因此,可能對其他人有幫助:
Swift 3x:
首先,給這樣的代表團:
class YOUR_VIEW_CONTROLLER: UIViewController, UIScrollViewDelegate
現在像這樣連接UIScrollView
和UIPageControl
的出口:
@IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var pageControl: UIPageControl!
注意:我正在使用顏色數組。 您可以改用圖像數組。
var colors:[UIColor] = [UIColor.red, UIColor.blue, UIColor.green, UIColor.yellow]
var frame: CGRect = CGRect(x:0, y:0, width:0, height:0)
現在,只需將以下代碼復制並粘貼到您的課程中:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
configurePageControl()
self.view.bringSubview(toFront: pageControl)
scrollView.delegate = self
self.view.addSubview(scrollView)
for index in 0..<4 {
frame.origin.x = self.scrollView.frame.size.width * CGFloat(index)
frame.size = self.scrollView.frame.size
let subView = UIView(frame: frame)
subView.backgroundColor = colors[index]
self.scrollView.addSubview(subView)
}
self.scrollView.isPagingEnabled = true
self.scrollView.contentSize = CGSize(width:self.scrollView.frame.size.width * 4,height: self.scrollView.frame.size.height)
pageControl.addTarget(self, action: #selector(self.changePage(sender:)), for: UIControlEvents.valueChanged)
}
func configurePageControl() {
// The total number of pages that are available is based on how many available colors we have.
self.pageControl.layer.zPosition = 1
self.pageControl.numberOfPages = colors.count
self.pageControl.currentPage = 0
self.pageControl.tintColor = UIColor.red
self.pageControl.pageIndicatorTintColor = UIColor.black
self.pageControl.currentPageIndicatorTintColor = UIColor.green
self.view.addSubview(pageControl)
}
// MARK : TO CHANGE WHILE CLICKING ON PAGE CONTROL
func changePage(sender: AnyObject) -> () {
let x = CGFloat(pageControl.currentPage) * scrollView.frame.size.width
scrollView.setContentOffset(CGPoint(x:x, y:0), animated: true)
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageNumber = round(scrollView.contentOffset.x / scrollView.frame.size.width)
pageControl.currentPage = Int(pageNumber)
}
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