本章学习到了：

1，代码弹出模态框，点击空白处收回键盘的事件

2，关闭模态窗口

3，pageControl+scroll的使用

4，UIPageViewController翻页效果，本页事件翻页快有bug

5，三级表视图，加载数据，跳转，一级传值数据到二级的操作

以下为学习时的Demo代码

代码弹出模态框，点击空白处收回键盘的事件

import UIKit//代码弹出模态框，点击空白处收回键盘的事件
class ViewController: UIViewController {@IBOutlet weak var username: UITextField!@IBOutlet weak var password: UITextField!//代码实现弹出模态框@IBAction func onReg(_ sender: UIButton) {//读取在故事板中定义 的 ID : NavViewControllerlet NavViewController = self.storyboard?.instantiateViewController(withIdentifier: "NavViewController") as! UINavigationController//弹出模态框self.present(NavViewController, animated: true, completion: {() -> Void inprint("弹出模态框")})}//NavViewControlleroverride func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.//注册点击事件self.view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleTap)))}//点击空白处关闭键盘方法func handleTap(sender: UITapGestureRecognizer) {if sender.state == .ended {print("收回键盘")self.username.resignFirstResponder()//username放弃第一响应者self.password.resignFirstResponder()//password放弃第一响应者}sender.cancelsTouchesInView = false}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}}

关闭模态窗口

import UIKit//关闭模态窗口
class CreateViewController: UIViewController {@IBAction func onCancel(_ sender: UIBarButtonItem) {//关闭模态self.dismiss(animated: true, completion: {() -> Void inprint("关闭模态")})}@IBAction func onDone(_ sender: UIBarButtonItem) {//关闭模态self.dismiss(animated: true, completion: {() -> Void inprint("关闭模态")})}@IBAction func onSave(_ sender: UIBarButtonItem) {//TODO 保存数据//关闭模态self.dismiss(animated: true, completion: {() -> Void inprint("关闭模态")})}override func viewDidLoad() {super.viewDidLoad()}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 navigationoverride func prepare(for segue: UIStoryboardSegue, sender: Any?) {// Get the new view controller using segue.destinationViewController.// Pass the selected object to the new view controller.}*/}

pageControl+scroll的使用

import UIKit//ScrollView与PageControl实现平铺导航（图片切换）
//创建一个主View加入ScrollView（设置为可分页）与PageControl
//创建三个View放入3个imageView@图片放进去，每个需要定义storyboardID//pageControl+scroll的使用
class PageViewController: UIViewController,UIScrollViewDelegate {@IBOutlet weak var scroll: UIScrollView! //ScrollView输出口@IBOutlet weak var pageControl: UIPageControl! //PageControl输出口var page1: UIView! = nilvar page2: UIView! = nilvar page3: UIView! = niloverride func viewDidLoad() {super.viewDidLoad()//要实现UIScrollViewDelegate需要将当前scroll指向当前控制器self.scroll.delegate = self//----------------初始化，将page1，2，3加为Scroll的子视图-----------------////self.scroll.frame.size.height|width //当前视图的宽或高let scrollWidth = self.scroll.frame.size.widthlet scrollHeight = self.scroll.frame.size.height//取得主storyboardlet mainStoryboard = self.storyboard//设置scrollView实际内容的大小self.scroll.contentSize = CGSize(width: scrollWidth * 3, height: scrollHeight)//获取3个pageViewcontroller视图，，赋值给page，然后设置page的坐标与大小let page1Viewcontroller = mainStoryboard?.instantiateViewController(withIdentifier: "page1")self.page1 = page1Viewcontroller?.viewself.page1.frame = CGRect(x: 0, y: 0, width: scrollWidth, height: scrollHeight)let page2Viewcontroller = mainStoryboard?.instantiateViewController(withIdentifier: "page2")self.page2 = page2Viewcontroller?.viewself.page2.frame = CGRect(x: scrollWidth, y: 0, width: scrollWidth, height: scrollHeight)let page3Viewcontroller = mainStoryboard?.instantiateViewController(withIdentifier: "page3")self.page3 = page3Viewcontroller?.viewself.page3.frame = CGRect(x: scrollWidth * 2, y: 0, width: scrollWidth, height: scrollHeight)//将page放到scrollView中self.scroll.addSubview(page1)self.scroll.addSubview(page2)self.scroll.addSubview(page3)}//------------实现UIScrollViewDelegate协议方法//实现滚动视图的滚动事件，图标滚动时 page的小点也跟个翻页func scrollViewDidScroll(_ scrollView: UIScrollView) {//获取scroll的偏移量对像let offset = scrollView.contentOffset//offset的x除以scrollWidth得到整数，赋值给pageControl的当前页self.pageControl.currentPage = Int(offset.x) / Int(self.scroll.frame.size.width)}//PageControl动作事件，page小点变换时，图片也跟着变化@IBAction func changaPage(_ sender: UIPageControl) {//得到pageControl的当前页数let whicth = self.pageControl.currentPage//设置scroll的偏移量，这种方法比较生硬，没有动画效果//self.scroll.contentOffset = CGPoint(x: CGFloat(whicth) * self.scroll.frame.size.width, y: 0)//使用setContentOffset可设置动画效果self.scroll.setContentOffset(CGPoint(x: CGFloat(whicth) * self.scroll.frame.size.width, y: 0), animated: true)}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}}

UIPageViewController翻页效果

import UIKit//定义一个枚举
enum DirectionForward: Int{case Before = 1 //向前翻页case After = 2 //向后翻页
}//UIPageViewController翻页效果，问题：当效果为scroll的时候，第二张会重复，第一页翻，前一页后一页方法都会调用？？？
class FanyeViewController: UIViewController,UIPageViewControllerDelegate,UIPageViewControllerDataSource {//当前页的索引var pageIndex = 0//将枚举放到变量，翻页时随时更换var directionForward = DirectionForward.Before //默认向后翻页//定义当前视图控制器成员常量 pageViewControllervar pageViewController: UIPageViewController!override func viewDidLoad() {super.viewDidLoad()//实例化UIPageViewController//UIPageViewControllerTransitionStyle为动画效果@翻书效果，枚举可以直接用点 .pageCurl//UIPageViewControllerNavigationOrientation为设备朝向@水平的self.pageViewController = UIPageViewController(transitionStyle: UIPageViewControllerTransitionStyle.pageCurl, navigationOrientation: UIPageViewControllerNavigationOrientation.horizontal, options: nil)//指定pageViewController的delegate与dataSource的实现者为当前视图self.pageViewController.delegate = selfself.pageViewController.dataSource = self//取得主storyboardlet mainStoryboard = self.storyboard//获取3个pageViewcontroller视图，，赋值给page，然后设置page的坐标与大小let page1Viewcontroller = mainStoryboard?.instantiateViewController(withIdentifier: "page1")//设置首页显示的视图为page1ViewController @ 第一个视图let viewControllers: NSArray = [page1Viewcontroller as Any]self.pageViewController.setViewControllers((viewControllers as! [UIViewController]),direction: .forward,animated: true, completion: nil)//将pageViewController加入到当前视图中self.view.addSubview(self.pageViewController.view)}//-----------------实现数据源DataSource协议方法//设置向前一页，必须实现的方法func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {//设置前当页索引pageIndex = pageIndex - 1if pageIndex < 0 {pageIndex = 0return nil}//print("Before\(pageIndex)")self.directionForward = .Before//NSString将字符串和数字拼接为Stringlet pageId = NSString(format:"page%i",pageIndex + 1)//获取当前的page*并return 返回let pvcontroller = self.storyboard?.instantiateViewController(withIdentifier: pageId as String)return pvcontroller}//设置向后一页，必须实现的方法func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {//设置前当页索引pageIndex = pageIndex + 1if pageIndex > 2 {pageIndex = 2return nil}//print("After\(pageIndex)")self.directionForward = .After//NSString将字符串和数字拼接为Stringlet pageId = NSString(format:"page%i",pageIndex + 1)//获取当前的page*并return 返回let pvcontroller = self.storyboard?.instantiateViewController(withIdentifier: pageId as String)return pvcontroller}//-----------------实现委托Delegate协议方法//设置书脊和是否双面显示func pageViewController(_ pageViewController: UIPageViewController, spineLocationFor orientation: UIInterfaceOrientation) -> UIPageViewControllerSpineLocation {//true为双面显示，false为单面显示self.pageViewController.isDoubleSided = false//设置书脊为min最小，在左侧return .min}//该委托方法是在翻页动作完成后触发的方法func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {//completed ＝＝ true 说明翻页成功//没有翻页成功设置if completed == false {if self.directionForward == .Before {//如果向前翻页pageIndex += 1 //还原翻页之前//print("qian:\(pageIndex)")}else if self.directionForward == .After {//如果向后翻页pageIndex -= 1 //还原翻页之前//print("hou:\(pageIndex)")}}}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()}}

三级表视图跳转传值：一级视图

import UIKit//三级表视图，第一级 @ 其中cell连线到二级表视图时，选择selectionSegue为点击整个cell时，accessory为点击扩展图标
class TreeTableViewController: UITableViewController {var allData: NSDictionary!var provinces: NSArray!override func viewDidLoad() {super.viewDidLoad()//获取plist文件路径let plistPath = Bundle.main.path(forResource: "provinces_cities", ofType: "plist")//获取属性列表文件中的全部数据保存到allData中self.allData = NSDictionary(contentsOfFile: plistPath!)//取allData字典所有key为数组放到provinces中self.provinces = self.allData.allKeys as NSArray!//设置当前Navigation下面表视图的标题self.title = "省份信息"}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}//TableViewDataSource 协议方法实现//返回表视图节的个数override func numberOfSections(in tableView: UITableView) -> Int {// #warning Incomplete implementation, return the number of sectionsreturn 1}//返回表视图每个节中的行数override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {// #warning Incomplete implementation, return the number of rowsreturn self.provinces.count}//返回每一个 自定义cell 的内容override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {//请求可重用单元格，需要一个标识,CustomCellTableViewCell为自定义单元格类let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath) as UITableViewCell//设置扩展视图的类型，就是Cell右侧的小箭头cell.accessoryType = UITableViewCellAccessoryType.disclosureIndicator//设置单元格中的主标题cell.textLabel?.text = self.provinces[indexPath.row] as? Stringreturn cell}//点击Cell会触发视图控制器的Segue方法override func prepare(for segue: UIStoryboardSegue, sender: Any?) {//判断是跳转的哪个segue，showtow为segue在故事板中定义的identifierif segue.identifier == "showtwo" {//得到二级（城市信息控制器）let datailVC = segue.destination as! TreetwoTableViewController//当前表视图被选择单元格let indexPath = self.tableView.indexPathForSelectedRow//以上得到的单元格的索引Rowlet row = indexPath?.row//当前单元格所对应的省份的名字let selectname = self.provinces[row!]//当前省份对应的城市信息的数组(将信息传给二级的listData)datailVC.listData = self.allData[selectname] as! NSArray//设置二级表视图名称datailVC.title = selectname as? String}}}

三级表视图跳转传值：二级视图

import UIKit
//三级表视图，第二级 
class TreetwoTableViewController: UITableViewController {//在一级视图获取当前cell的省信息中的城市信息为数据传递过来var listData: NSArray! = niloverride func viewDidLoad() {super.viewDidLoad()}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated}//TableViewDataSource 协议方法实现//返回表视图节的个数override func numberOfSections(in tableView: UITableView) -> Int {// #warning Incomplete implementation, return the number of sectionsreturn 1}//返回表视图每个节中的行数override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {// #warning Incomplete implementation, return the number of rowsreturn self.listData.count}//返回每一个 自定义cell 的内容override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {//请求可重用单元格，需要一个标识,CustomCellTableViewCell为自定义单元格类let cell = tableView.dequeueReusableCell(withIdentifier: "towidentifier", for: indexPath) as UITableViewCell//设置扩展视图的类型，就是Cell右侧的小箭头cell.accessoryType = UITableViewCellAccessoryType.disclosureIndicator//某个省数据信息中的城市字典信息let towDict = self.listData[indexPath.row] as! NSDictionary//设置单元格中的主标题cell.textLabel?.text = towDict["name"] as? Stringreturn cell}//点击Cell会触发视图控制器的Segue方法override func prepare(for segue: UIStoryboardSegue, sender: Any?) {//判断是跳转的哪个segue，showthree为segue在故事板中定义的identifierif segue.identifier == "showthree" {//得到三级（城市信息控制器）let datailVC = segue.destination as! TreeThreeViewController//当前表视图被选择单元格let indexPath = self.tableView.indexPathForSelectedRow//以上得到的单元格的索引Rowlet row = indexPath?.row//当前单元格所对应的城市信息字典let twoDict = self.listData[row!] as! NSDictionary//当前省份对应的城市信息的数组(将信息传给三级的twoUrl)datailVC.twoUrl = twoDict["url"] as! String//设置三级表视图名称let threeTitle = NSString(format:"百科:%@",(twoDict["name"] as? String)!)datailVC.title = threeTitle as String}}

三级表视图跳转传值：二级视图

import UIKit
//三级表视图，第三级 
class TreeThreeViewController: UIViewController,UIWebViewDelegate {var twoUrl: String!@IBOutlet weak var threewebHF: UIWebView! //webview输出口//如果上下有灰色或出现黑色，需要先加webview在连线override func viewDidLoad() {super.viewDidLoad()//设置访问资源 - 百度搜索let url = URL(string: self.twoUrl)//只能https，http当前版本做了限制//建立网络请求let request = URLRequest(url: url!)//加载网络请求self.threewebHF.loadRequest(request)//print(self.twoUrl)self.threewebHF.delegate = self}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}}