• 1.用來做引導圖的控件可以根據自己的選擇來決定，我在此用的是 UICollectionView 做的
• 2.說明一下，swift的一個控制器里面可以創建多個類
• 3.NewFeatureCollectionViewController.swift具體的代碼如下

111.gif

import UIKit
private let reuseIdentifier = "Cell"
class NewFeatureCollectionViewController: UICollectionViewController {

private let pageCount = 3
private var layout: UICollectionViewFlowLayout = NewFeaturelayout()
// 因為系統初始化的構造方法是帶參數的(UICollectionViewFlowLayout) 而不是不帶參數的，所以不用加 override
init(){
    
    super.init(collectionViewLayout: layout)
    self.collectionView?.backgroundColor = UIColor.white
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

override func viewWillAppear(_ animated: Bool) {
    
    super.viewWillAppear(animated)
    /*
    //1.設置layout的布局
    layout.itemSize = UIScreen.main.bounds.size
    layout.minimumLineSpacing = 0
    layout.minimumInteritemSpacing = 0
    layout.scrollDirection = UICollectionViewScrollDirection.horizontal
    // 2.設置collectionView的屬性
    collectionView?.showsHorizontalScrollIndicator = false
    collectionView?.bounces = false
    collectionView?.isPagingEnabled = true
    */
}

override func viewDidLoad() {
    super.viewDidLoad()
    
    // 1.注冊一個cell
    collectionView?.register(newFeatureCell.self, forCellWithReuseIdentifier: reuseIdentifier)
}

// MARK: UICollectionViewDataSource UICollectionViewDelegate
override func numberOfSections(in collectionView: UICollectionView) -> Int {
    
    return 1
}
// 返回一共有多少個cell
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    
    return pageCount
}
// cell的重寫
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    // 1.獲取cell
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! newFeatureCell
    // 2.設置cell的數據
    cell.ImageIndex = indexPath.item + 1
    // 3.返回cell
    return cell
}

override func collectionView(_ collectionView: UICollectionView, didEndDisplaying cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
    // 傳遞給我們的是上一頁的索引
    let path = collectionView.indexPathsForVisibleItems.last
    print(path!)
}

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    
    if indexPath.item == pageCount-1 {
        
          print("您點擊的是租后一頁,頁碼是第\(indexPath.item+1)頁")
    }
    
}

   override func didReceiveMemoryWarning() {
      super.didReceiveMemoryWarning()
      // Dispose of any resources that can be recreated.
   }

}

// MARK: 自定義cell swift的一個文件里面可以定義多個類的
private class newFeatureCell: UICollectionViewCell
{
// 保存圖片的索引
// 在swift里面,private修飾的東西如果是在同一個文件下是可以被調用的
var ImageIndex:Int?{
    
    didSet{
       
        iconView.image = UIImage(named:"guide_\(ImageIndex!).jpg")
    }
}

override init(frame: CGRect) {
    
    super.init(frame: frame)
    
    // 1.初始化UI
    setupUI()
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

private func setupUI(){
    
    // 1.添加子控件到 UICollectionView 上
    contentView.addSubview(iconView)
    // 2.布局子控件的位置
    iconView.frame = contentView.frame
}

// MARK:- 懶加載
private lazy var iconView: UIImageView = {
    
    let iconViewImage = UIImageView()
    iconViewImage.contentMode = UIViewContentMode.scaleAspectFill
    iconViewImage.clipsToBounds = true
    return iconViewImage
}()

// MARK: 重寫layout方法
private class NewFeaturelayout: UICollectionViewFlowLayout {

   override func prepare() {
    // 1.準備布局
    // 什么時候調用？ 1.先調用一個有 多少cell 2.調用準備布局，3.調用返回cell
    itemSize = UIScreen.main.bounds.size
    minimumLineSpacing = 0
    minimumInteritemSpacing = 0
    scrollDirection = UICollectionViewScrollDirection.horizontal
    // 2.設置collectionView的屬性
    collectionView?.showsHorizontalScrollIndicator = false
    collectionView?.bounces = false
    collectionView?.isPagingEnabled = true
   }
}