如何在 iOS 中为 Swift 3/4 移除 UIPageViewController 弹跳效果答案

【问题标题】：How to remove UIPageViewController's Bounce effect in iOS for Swift 3/4如何在 iOS 中为 Swift 3/4 移除 UIPageViewController 弹跳效果
【发布时间】：2018-03-12 06:31:59
【问题描述】：

这是我的问题的截图：

【问题讨论】：

标签： ios iphone swift uipageviewcontroller bounce

【解决方案1】：

首先在你的 UIPageViewController 中找到滚动视图并添加 UIScrollViewDelegate

for view in self.pageViewController!.view.subviews {
        if let subView = view as? UIScrollView {
            subView.delegate = self
            subView.isScrollEnabled = true
            subView.bouncesZoom = false

        }
}

（在您的 ViewController 类中扩展 UIScrollViewDelegate）

对于方法“scrollViewDidScroll”和“scrollViewWillEndDragging”上的 UIScrollViewDelegate，您可以添加类似这样的内容

func scrollViewDidScroll(_ scrollView: UIScrollView) {

    if(currentIndex == 0 && scrollView.contentOffset.x < scrollView.bounds.size.width){
        scrollView.contentOffset = CGPoint(x:scrollView.bounds.size.width, y:0.0)
    }else if(currentIndex == 2 && scrollView.contentOffset.x > scrollView.bounds.size.width) {
        scrollView.contentOffset = CGPoint(x:scrollView.bounds.size.width, y:0.0)
    }
}

func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
    if(currentIndex == 0 && scrollView.contentOffset.x < scrollView.bounds.size.width){
        scrollView.contentOffset = CGPoint(x:scrollView.bounds.size.width, y:0.0)
    }else if(currentIndex == 2 && scrollView.contentOffset.x > scrollView.bounds.size.width) {
        scrollView.contentOffset = CGPoint(x:scrollView.bounds.size.width, y:0.0)
    }
}

【讨论】：

【解决方案2】：

我已经像下面的代码那样做了。

func scrollViewDidScroll(scrollView: UIScrollView) {
if currentIndex == 0 && scrollView.contentOffset.x < scrollView.bounds.size.width {
    scrollView.contentOffset = CGPoint(x: scrollView.bounds.size.width, y: 0)
} else if currentIndex == totalViewControllers - 1 && scrollView.contentOffset.x > scrollView.bounds.size.width {
    scrollView.contentOffset = CGPoint(x: scrollView.bounds.size.width, y: 0)
    }
}
func scrollViewWillEndDragging(scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
    if currentIndex == 0 && scrollView.contentOffset.x < scrollView.bounds.size.width {
        scrollView.contentOffset = CGPoint(x: scrollView.bounds.size.width, y: 0)
    } else if currentIndex == totalViewControllers - 1 && scrollView.contentOffset.x > scrollView.bounds.size.width {
        scrollView.contentOffset = CGPoint(x: scrollView.bounds.size.width, y: 0)
    }
}

【讨论】：

感谢您的回答！