第七天:SwiftLoginGuide

参考链接:https://www.jianshu.com/p/a7834f90caf2

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 

import UIKit

class MainCustomNavigationController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.view.backgroundColor = UIColor.cyan
        
        if isFirstLaunch() {
            perform(#selector(showGuideViewController), with: nil, afterDelay: 0.01)
        } else if isLogined() {
//            perform(#selector(showLoginViewController), with: nil, afterDelay: 0.01)
        } else {
             perform(#selector(showLoginViewController), with: nil, afterDelay: 0.01)
        }

        // Do any additional setup after loading the view.
    }

    func isFirstLaunch() -> Bool {
        return true
    }
    
    func isLogined() -> Bool {
        return false
    }
    
    @objc func showLoginViewController() {
        let storyboard = UIStoryboard (name: "LoginViewController", bundle: nil)
        let loginVC = storyboard.instantiateViewController(withIdentifier: "loginVCIdentifier") as! LoginViewController
        
        present(loginVC, animated: false) {
            //
        }
    }
    
    func isFinshGuideViewController() {
        dismiss(animated: false) {
            //
        }
        
        showLoginViewController()
    }
    
    @objc func showGuideViewController() {
        let storyboard = UIStoryboard (name: "GuideViewController", bundle: nil)
        let guideVC = storyboard.instantiateViewController(withIdentifier: "guideVCIdentifier") as! GuideViewController
        
        present(guideVC, animated: false) {
            //
        }
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

import UIKit

class GuideViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, UICollectionViewDelegate {

    @IBOutlet weak var collectionView: UICollectionView!
    @IBOutlet weak var skipBtn: UIButton!
    @IBOutlet weak var continueBtn: UIButton!
    @IBOutlet weak var pageControler: UIPageControl!
    
    @IBOutlet weak var shipBtnTop: NSLayoutConstraint!
    @IBOutlet weak var continueBtnTop: NSLayoutConstraint!
    @IBOutlet weak var pageControlerBottom: NSLayoutConstraint!
    
    lazy var pages: [PageItemModel] = [
            PageItemModel (dict: ["imageName":"moreInfo", "title":"发现更多", "detail":"在这里发现更多，做你想做的。\nE浏览附近感兴趣的群体，并加入他们。"]),
            PageItemModel (dict: ["imageName":"moreInspir", "title":"更多灵感，更多思路", "detail":"遇见更多志同道合者。\n并与他们保持联系。"]),
            PageItemModel (dict: ["imageName":"moreSimpler", "title":"更加简洁", "detail":"比以前更加简洁\n为你打造更加便捷的使用体验，更加轻松的找到你想要的。"])
    ]
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        registerCell()
        setBtn()
        
        pageControler.numberOfPages = pages.count + 1
    }
    
    fileprivate func registerCell () {
        collectionView.register(UINib (nibName: "GuideViewControllerCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "GuideViewControllerCollectionViewCell")
        collectionView.register(UINib (nibName: "GuideViewControllerFinshCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "GuideViewControllerFinshCollectionViewCell")
    }
    
    fileprivate func setBtn() {
        skipBtn.addTarget(self, action: #selector(pageSkipHandler(sender:)), for: .touchUpInside)
        
        continueBtn.addTarget(self, action: #selector(pageSkipHandler(sender:)), for: .touchUpInside)
    }
    
    @objc func pageSkipHandler(sender: UIButton) {
        let indexPath: IndexPath!
        
        if  sender == continueBtn {
            indexPath = IndexPath (row: pageControler.currentPage + 1, section: 0)
            pageControler.currentPage += 1
        } else {
            indexPath = IndexPath (row: pages.count, section: 0)
            pageControler.currentPage = pages.count
        }
        
        if pageControler.currentPage == pages.count {
            moveItemRelativeToScreen(off: true)
        }
        
        self.collectionView.scrollToItem(at: indexPath, at: .centeredHorizontally, animated: true)
    }
    
    func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
        
        let pageNum: Int = Int(targetContentOffset.pointee.x / view.frame.width)
        pageControler.currentPage = pageNum
        
        if pageNum == pages.count {
            moveItemRelativeToScreen(off: true)
        } else {
            moveItemRelativeToScreen(off: false)
        }
    }
    
    func moveItemRelativeToScreen(off: Bool) {
        if off {
            pageControlerBottom.constant = -54.0
            shipBtnTop.constant = -100.0
            continueBtnTop.constant = -100.0
            skipBtn.isEnabled = false
            continueBtn.isEnabled = false
        } else {
            pageControlerBottom.constant = 0
            shipBtnTop.constant = 0
            continueBtnTop.constant = 0
            skipBtn.isEnabled = true
            continueBtn.isEnabled = true
        }
        
        // layout subviews
        UIView.animate(withDuration: 0.5, delay: 0, options: .curveEaseOut, animations: {
            self.view.layoutIfNeeded()
        }, completion: nil)
    }
    
    override func willTransition(to newCollection: UITraitCollection, with coordinator: UIViewControllerTransitionCoordinator) {
        let indexPath = IndexPath (item: pageControler.currentPage, section: 0)
        
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.01) {
            self.collectionView.scrollToItem(at: indexPath, at: .centeredHorizontally, animated: true)
        }
    }
    
    deinit {
        print("\(self) has been deinit")
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

extension GuideViewController {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return pages.count + 1
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        
        if indexPath.row == pages.count {
            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GuideViewControllerFinshCollectionViewCell", for: indexPath)
            
            return cell
        }
        
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "GuideViewControllerCollectionViewCell", for: indexPath) as! GuideViewControllerCollectionViewCell
        
        let page = pages[indexPath.row]
        
//        print("打印 pages 数组: \(pages)")
//        print("打印 page Model: \(page.title) \(page.detail) \(page.imageName)")
        
        cell.textLabel.text = page.title?.appendingFormat("%@", page.detail!)
        
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize (width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height)
    }
    
}

import UIKit

@objcMembers class PageItemModel: NSObject {

    var imageName: String?
    var title: String?
    var detail: String?
    
    init(dict: [String: Any]) {
        super.init()
        
        setValuesForKeys(dict)
    }
    
    override func setValue(_ value: Any?, forUndefinedKey key: String) {
        // do SomeThing
    }
}