Swift USES CollectionView to achieve the sliding effect of the advertising bar
- 2020-06-12 10:47:03
- OfStack
This article shares the specific code of Swift to realize the sliding effect of advertisement bar for your reference. The specific content is as follows
Create 1 class: PlayCollectionViewController.swift
//cell Reuse identifier
private let reuseIdentifier = "reuseIdentifier"
class PlayCollectionViewController: UICollectionViewController {
// The page number
private let pageCount = 6
// The layout object ( Custom layout )
private var layout: UICollectionViewFlowLayout = PlayLayout()
init() {
super.init(collectionViewLayout: layout)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
// registered cell
collectionView?.registerClass(NewfearureCell.self, forCellWithReuseIdentifier: reuseIdentifier)
}
//MARK: - UICollectionDataSource
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return pageCount
}
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! NewfearureCell
cell.imageIndex = indexPath.item
return cell
}
}
Custom cell for CollectionView
//MARK: - We're still here (PlayCollectionViewController.swift In the file ) The custom collectionViewCell
class NewfearureCell: UICollectionViewCell {
// Save image index
private var imageIndex:Int? {
didSet {
// Create picture names based on page Numbers ( You need only the most and most names for each image 1 The number of different )
iconView.image = UIImage(named: "image_\(imageIndex!)")
}
}
override init(frame: CGRect) {
super.init(frame: frame)
// Initialize the UI
setupUI()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func setupUI() {
// Add child controls to contentView
contentView.addSubview(iconView)
// Layout child control positions ( Fill the screen )
iconView.xmg_Fill(contentView)
}
//MARK: Lazy loading
private lazy var iconView = UIImageView()
}
Inherit from UICollectionViewFlowLayout and customize the layout
private class PlayLayout: UICollectionViewFlowLayout {
// Overrides the way the system prepares the layout
override func prepareLayout() {
// Set up the layout layout
itemSize = UIScreen.mainScreen().bounds.size
minimumInteritemSpacing = 0
minimumLineSpacing = 0
scrollDirection = UICollectionViewScrollDirection.Horizontal
// Set other properties
collectionView?.showsHorizontalScrollIndicator = false
collectionView?.bounces = false
collectionView?.pagingEnabled = true
}
}