（Swift4.0）App引导页封装

1.自定义引导页控制器

import UIKit

let kScreenWidth = UIScreen.main.bounds.size.width

let kScreenHeight = UIScreen.main.bounds.size.height

letkHighlighted =UIColor.init(red:230/255.0, green:230/255.0, blue:230/255.0, alpha:1.0)

letkBtnBackgroundColor =UIColor.clear

classCCPageControlSwift:UIView

,UICollectionViewDelegate

,UICollectionViewDataSource,

UICollectionViewDelegateFlowLayout{

    //分区数

    funcnumberOfSectionsInCollectionView(collectionView:UICollectionView) ->Int{

        return1;

    }

    //每个分区含有的 item 个数

    funccollectionView(_collectionView:UICollectionView, numberOfItemsInSection section:Int) ->Int{

        return self.imageListCount!;

    }

    //每个分区的内边距

    funccollectionView(_collectionView:UICollectionView, layout collectionViewLayout:UICollectionViewLayout, insetForSectionAt section:Int) ->UIEdgeInsets{

        returnUIEdgeInsetsMake(0,0,0,0);

    }

    //最小 item 间距

    funccollectionView(_collectionView:UICollectionView, layout collectionViewLayout:UICollectionViewLayout, minimumInteritemSpacingForSectionAt section:Int) ->CGFloat{

        return0;

    }

    //最小行间距

    funccollectionView(_collectionView:UICollectionView, layout collectionViewLayout:UICollectionViewLayout, minimumLineSpacingForSectionAt section:Int) ->CGFloat{

        return0;

    }

    //item 的尺寸

    funccollectionView(_collectionView:UICollectionView, layout collectionViewLayout:UICollectionViewLayout, sizeForItemAt indexPath:IndexPath) ->CGSize{

        returnCGSize.init(width: collectionView.frame.size.width, height: collectionView.frame.size.height)

    }

    funccollectionView(_collectionView:UICollectionView, cellForItemAt indexPath:IndexPath) ->UICollectionViewCell{

        letcell = collectionView.dequeueReusableCell(withReuseIdentifier:pageControlCellId, for: indexPath)as!PageControlCollectionViewCell;

        cell.imageV?.image=UIImage(named:self.imageList![indexPath.row]as!String)

        returncell

    }

    /*

    // Only override draw() if you perform custom drawing.

    // An empty implementation adversely affects performance during animation.

    override func draw(_ rect: CGRect) {

        // Drawing code

    }

    */

    varcollectionView :UICollectionView?

    varpageControl :UIPageControl?

    varcancelBtn :UIButton?

    letpageControlCellId ="cellid"

    varimageListCount :Int?

    varimageList :Array?

    overrideinit(frame:CGRect){

        super.init(frame: frame)

    }

    typealiaspageNumBlock = (_selectIndex :Int) ->Void

    varpageBlock:pageNumBlock?

    typealiastouchBtnBlock = () ->Void

    vartouchBlock:touchBtnBlock?

    classfuncSetupPageControlView(imagesList :Array , block :pageNumBlock? , touchBlock :touchBtnBlock?){

        letpageControlView =CCPageControlSwift.init(frame:CGRect.init(x:0, y:0, width:kScreenWidth, height:kScreenHeight))

        pageControlView.backgroundColor= .red

        UIApplication.shared.keyWindow?.addSubview(pageControlView)

        pageControlView.setValues(imageList: imagesList)

        pageControlView.setupUI()

        pageControlView.pageBlock= block

        pageControlView.touchBlock= touchBlock

    }

    funcsetValues(imageList :Array) {

        self.imageListCount= imageList.count

        self.imageList= imageList

    }

    funcsetupUI(){

        let flowLayout = UICollectionViewFlowLayout()

        flowLayout.scrollDirection= .horizontal

        collectionView=UICollectionView.init(frame:CGRect.init(x:0, y:0, width:self.frame.size.width, height:self.frame.size.height),collectionViewLayout:flowLayout)

        collectionView!.backgroundColor = .white

        collectionView!.isPagingEnabled = true

        collectionView!.bounces = false

        collectionView!.delegate = self

        collectionView!.dataSource = self

        collectionView!.showsVerticalScrollIndicator = false

        collectionView!.showsHorizontalScrollIndicator = false

        collectionView!.register(PageControlCollectionViewCell.self, forCellWithReuseIdentifier: pageControlCellId)

        self.addSubview(collectionView!);

        pageControl=UIPageControl(frame:CGRect.init(x:0, y:0, width:self.frame.size.width, height:30))

        pageControl!.center = CGPoint.init(x: self.frame.size.width/2, y: self.frame.size.height - (pageControl?.frame.size.height)!)

        pageControl!.backgroundColor = .clear

        pageControl!.numberOfPages = self.imageListCount!

        pageControl!.currentPage=0

        //设置单页时隐藏

        pageControl!.hidesForSinglePage = true

        //设置显示颜色

        pageControl!.currentPageIndicatorTintColor = .green

        //设置页背景指示颜色

        pageControl!.pageIndicatorTintColor = .lightGray

        self.addSubview(pageControl!)

        cancelBtn=UIButton(frame:CGRect.init(x:0, y:0, width:self.frame.size.width*0.5, height:self.frame.size.height*0.08))

        cancelBtn?.center = CGPoint.init(x: self.frame.size.width/2, y: (self.pageControl?.frame.origin.y)! - (self.cancelBtn?.frame.size.height)!/2-10)

        cancelBtn?.backgroundColor = kBtnBackgroundColor

        cancelBtn?.layer.masksToBounds = true

        cancelBtn?.layer.cornerRadius = (cancelBtn?.frame.size.height)!/2

        cancelBtn?.layer.borderWidth = 1.0;

        cancelBtn?.layer.borderColor = UIColor.white.cgColor;

        cancelBtn?.setTitle("立即体验", for: .normal)

        cancelBtn?.addTarget(self, action:#selector(buttonBackGroundHighlighted(_:)), for: .touchDown)

        cancelBtn?.addTarget(self, action:#selector(removeViewBtn(_:)), for: .touchUpInside)

        self.addSubview(cancelBtn!)

        ifself.imageListCount==1{

            cancelBtn?.isHidden=false

        }

        else

        {

            cancelBtn?.isHidden=true

        }

    }

    @objcfuncbuttonBackGroundHighlighted(_btn :UIButton) {

        btn.backgroundColor = kHighlighted

    }

    @objcfuncremoveViewBtn(_btn :UIButton) {

        btn.backgroundColor = kBtnBackgroundColor

        touchBlock?()

        self.removeFromSuperview()

    }

    funcscrollViewDidEndDecelerating(_scrollView:UIScrollView) {

        //通过scrollView内容的偏移计算当前显示的是第几页

        letpage =Int(scrollView.contentOffset.x/ scrollView.frame.size.width)

        //设置pageController的当前页

        pageControl?.currentPage= page

        ifpage ==self.imageListCount!-1{

//            print("最后一页了")

        }

        pageBlock?(page)

    }

    funcscrollViewDidScroll(_scrollView:UIScrollView) {

        if(Int)(scrollView.contentOffset.x/self.frame.size.width) == (self.imageList?.count)!-1{

            cancelBtn?.isHidden=false

        }

        else

        {

            cancelBtn?.isHidden=true

        }

    }

    requiredinit?(coder aDecoder:NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

}

2.自定义引导页控制器cell

import UIKit

classPageControlCollectionViewCell:UICollectionViewCell{

    varimageV :UIImageView?

    overrideinit(frame:CGRect) {

        super.init(frame: frame);

         imageV=UIImageView(frame:CGRect.init(x:0, y:0, width:self.frame.size.width, height:self.frame.size.height))

        self.addSubview(imageV!);

    }

    requiredinit?(coder aDecoder:NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

}

3.在使用的地方调用即可

import UIKit

classViewController:UIViewController{

 varsaveImageList = [String]()

      varimageList :[String] = ["image1","image2","image3"]

    overridefuncviewDidLoad() {

        super.viewDidLoad()

        CCPageControlSwift.SetupPageControlView(imagesList:imageList, block: { (pageNum)in

            print("第\(pageNum+1)页")

        }) {

            print("点击了Button")

        }

        // Do any additional setup after loading the view, typically from a nib.

    }

    overridefuncdidReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}