Question

我有一张新的ViewController上的imageView的图片数组。我可以让我的pageControl显示点，但是当我滑动到下一张图片时，点不会动画。关于无法找到的我有什么想法吗？谢谢！

import UIKit
import GoogleMobileAds


class imageViewController: UIViewController,GADBannerViewDelegate, UIGestureRecognizerDelegate, UIScrollViewDelegate {

    var bannerView: GADBannerView!

    @IBOutlet weak var scrollView: UIScrollView!
    @IBOutlet weak var myImageView: UIImageView!
    @IBOutlet weak var pageControl: UIPageControl!


    var passedImage : UIImage! = nil
    var passedArray : [UIImage]!
    var index = 0


    override func viewDidLoad(){
        super.viewDidLoad()
        self.myImageView.image = passedArray.first

        scrollView.minimumZoomScale = 1.0
        scrollView.maximumZoomScale = 5.0

        configurePageControl()


        //---------ADS----------------
        // In this case, we instantiate the banner with desired ad size.
        bannerView = GADBannerView(adSize: kGADAdSizeBanner)
        addBannerViewToView(bannerView)
    }

    func viewForZooming(in scrollView: UIScrollView) -> UIView? {
        return myImageView
    }

    func configurePageControl() {
        self.pageControl.numberOfPages = passedArray.count
        self.pageControl.currentPage = 0
        self.pageControl.pageIndicatorTintColor = UIColor.black
    self.pageControl.currentPageIndicatorTintColor = UIColor.red
        self.view.addSubview(pageControl)

    }



    @IBAction func pictureswipe(_ sender: Any) {
        let pictureString = self.passedArray[index]
        self.myImageView.image = pictureString

        index = (index < passedArray.count-1) ? index+1 : 0
    }

    @IBAction func pictureswipeback(_ sender: Any) {
        let pictureString = self.passedArray[index]
        self.myImageView.image = pictureString

        index = (index > passedArray.count+1) ? index-1 : 0
    }

Answer 1

您还需要使用新索引来更新pageControl的{{1}}，请尝试按以下方式更新currentPage方法。

IBAction

滑动到下一张图片时，PageControl不会动画

1 个答案: