滚动视图对齐居中

Question

我想像这个视频一样设置我的滚动视图(我知道在视频中使用collectionview bu出于某种原因我想将此效果转换为scrollView(

https://www.dropbox.com/s/kj6xgj68gz6258p/ScreenRecording_06-26-2018%2019-15-43.MP4

3件重要的事情：

1. 滚动时必须与中心对齐
2. 调整当前项目的大小(向前项目大于向后项目(
3. .swift

更新：

var ScrollView = UIScrollView()
var arr : Array<UIColor> = [.red,.blue,.green]
override func viewDidLoad() {
super.viewDidLoad()
ScrollView.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(ScrollView)
ScrollView.widthAnchor.constraint(equalToConstant: self.view.frame.size.width).isActive = true
ScrollView.heightAnchor.constraint(equalToConstant: 320).isActive = true
ScrollView.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: 0).isActive = true
ScrollView.alwaysBounceVertical = false
ScrollView.isPagingEnabled = true
ScrollView.contentSize = CGSize(width: 3.0 * self.view.frame.size.width, height: 320)
ScrollView.contentOffset = CGPoint(x: view.frame.size.width, y: 0)

ScrollView.center = self.view.center
for i in 0..<3 {
let viewBG = UIView()
viewBG.backgroundColor = arr[i]
if (i == 0) {
viewBG.frame = CGRect(x: view.frame.size.width * CGFloat(i) + 125, y: 0, width: view.frame.size.width - 100, height: 320)
} else if(i == 1) {
viewBG.frame = CGRect(x: view.frame.size.width * CGFloat(i) + 50, y: 0, width: view.frame.size.width - 100, height: 320)
} else {
viewBG.frame = CGRect(x: view.frame.size.width * CGFloat(i) - 25, y: 0, width: view.frame.size.width - 100, height: 320)
}

ScrollView.addSubview(viewBG)
}
}

谢谢大家

Answer 1

使用 iCarousal。它很容易实现，并且 Swift 示例也可用。

以下是链接 - https://github.com/nicklockwood/iCarousel