platform-ios/RainbowPlanet/RainbowPlanet/Tools/GuidePageView/GuidePageView.swift

//
//  GuidePageView.swift
//  RainbowPlanet
//
//  Created by 南鑫林 on 2019/8/14.
//  Copyright © 2019 RainbowPlanet. All rights reserved.
//

import UIKit
import FSPagerView

class GuidePageView: UIView {
    
    deinit {
        NXLLog("deinit")
    }

    /// 图片数组
    private var images : Array<String>?
    
    override init(frame: CGRect) {
        super.init(frame: frame)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    init(frame:CGRect,images:Array<String>?) {
        self.init()
        self.images = images
        self.frame = frame
        setupViews()
        setupLayouts()
    }
    
    
    func setupViews() {
        addSubview(pagerView)
        addSubview(pageControl)
    }
    
    func setupLayouts() {
        pagerView.snp.makeConstraints { (make) in
            make.edges.equalToSuperview()
        }
        
        let pageControlWidth = CGFloat((self.images?.count)! - 1) * 8 +  CGFloat((self.images?.count)! - 1) * 15 + 24
        
        pageControl.snp.makeConstraints { (make) in
            make.centerX.equalToSuperview()
            make.bottom.equalTo(-50)
            make.height.equalTo(8)
            make.width.equalTo(pageControlWidth)
        }
    }
    
    private lazy var pagerView: FSPagerView = {
        let pagerView = FSPagerView(frame: CGRect.zero)
        pagerView.backgroundColor = kf7f8faColor
        pagerView.delegate = self
        pagerView.dataSource = self
        pagerView.scrollDirection = .horizontal
        pagerView.bounces = false
        pagerView.isInfinite = false
        pagerView.automaticSlidingInterval = 0
        return pagerView
    }()
    
    private lazy var pageControl: NXLPageControl = {
        let pageControl = NXLPageControl()
        pageControl.numberOfPages = self.images?.count ?? 0
        pageControl.pointSize = CGSize.init(width: 8, height: 8)
        pageControl.currentWidthMultiple = 3//当前点的宽度为其他点的3倍
        pageControl.localPointSpace = 15
        pageControl.currentColor = UIColor.black
        pageControl.otherColor = kEDEEF0Color
        pageControl.clickPoint { _ in }
        return pageControl
    }()
    
    //MARK: - 移除所有的View
    private func removeGuideViewFromSupview() {
        UIView.animate(withDuration: 1.0, delay: 0, options: UIView.AnimationOptions.curveEaseOut, animations: { [weak self] in
            self?.alpha = 0.0
        }) { [weak self] (_) in
            self?.removeFromSuperview()
        }
    }
    
    class func guidePageView(images:Array<String>?) {
        if UserDefaults.isFirstLaunchOfNewVersion() {
            let window = UIApplication.shared.windows.last
            let guidePageView = GuidePageView.init(frame:UIScreen.main.bounds,images: images)
            window?.addSubview(guidePageView)
        }
    }
    
}

extension GuidePageView :FSPagerViewDataSource,FSPagerViewDelegate {
    func numberOfItems(in pagerView: FSPagerView) -> Int {
        return images?.count ?? 0
    }
    func pagerView(_ pagerView: FSPagerView, cellForItemAt index: Int) -> FSPagerViewCell {
        let cell  = GuidePageViewCell.cellWith(pagerView: pagerView, index: index)
        cell.images = images
        cell.startClosure = {
            [weak self] in
            self?.removeGuideViewFromSupview()
        }

        return cell
    }

    func pagerView(_ pagerView: FSPagerView, didSelectItemAt index: Int) {
        pagerView.deselectItem(at: index, animated: true)
    }
    
    func pagerViewWillEndDragging(_ pagerView: FSPagerView, targetIndex: Int) {
        self.pageControl.currentPage = targetIndex
        if targetIndex == (images?.count ?? 1) - 1 {
            self.pageControl.isHidden = true
        }else {
            self.pageControl.isHidden = false
        }
    }
    func pagerViewDidEndScrollAnimation(_ pagerView: FSPagerView) {
        self.pageControl.currentPage = pagerView.currentIndex
    }
}