import UIKit
class DWBTestViewController: UIViewController,UIPageViewControllerDataSource,UIPageViewControllerDelegate {
///懒加载一个page
private lazy var pageViewControllerMain:UIPageViewController = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
//数组
private lazy var dataSouceControll = [UIViewController]()
//获取索引
private lazy var nextIndex : Int = 0
//创建上面的滚动条
private lazy var scrollerView : UIScrollView = UIScrollView()
//子控制器1
private lazy var pageFirst : UIViewController = UIViewController()
//子控制器2
private lazy var pageTwo : UIViewController = UIViewController()
//子控制器3
private lazy var pageThree : UIViewController = UIViewController()
//子控制器4
private lazy var pagefouer : UIViewController = UIViewController()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.white
//创建导航栏
createSelfNav()
//创建UI
createPageUI()
}
/// 将要出现的时候影藏系统导航栏，这里创建导航栏
func createSelfNav(){
//导航栏父视图
let topView = UIView()
topView.frame = CGRect(x: 0, y: 0, width: SCREEN_WIDTH, height: 64)
topView.backgroundColor = UIColor.white
self.view.addSubview(topView)
//创建返回键
let buttonBack:UIButton = UIButton(type: .custom)
buttonBack.frame = CGRect(x:0,y:20,width:44,height:44)
buttonBack.setImage(UIImage(named: "返回"), for: .normal)
buttonBack.setTitleColor(UIColor.yellow, for: .normal)
buttonBack.addTarget(self, action:#selector(blaceAction), for: .touchUpInside)
topView.addSubview(buttonBack)
//创建标题
let labelTitle = UILabel()
labelTitle.frame = CGRect(x: 44, y: 20, width: SCREEN_WIDTH-88, height: 44)
labelTitle.text = "UIPageViewController"
labelTitle.font = UIFont.systemFont(ofSize: 18)
labelTitle.textColor = UIColor.black
labelTitle.textAlignment = .center
topView.addSubview(labelTitle)
//创建返回键
let buttonBackRight:UIButton = UIButton(type: .custom)
buttonBackRight.frame = CGRect(x:SCREEN_WIDTH-44,y:20,width:44,height:44)
buttonBackRight.setImage(UIImage(named: "悬浮分享"), for: .normal)
buttonBackRight.setTitleColor(UIColor.yellow, for: .normal)
buttonBackRight.tag = 112222
buttonBackRight.addTarget(self, action:#selector(blaceRightAction), for: .touchUpInside)
topView.addSubview(buttonBackRight)
//创建一条线
let imageLine = UIImageView()
imageLine.frame = CGRect(x: 0, y: 63, width: SCREEN_WIDTH, height: 1)
imageLine.backgroundColor = UIColor.groupTableViewBackground
topView.addSubview(imageLine)
}
//返回点击
func blaceAction(){
self.navigationController!.popViewController(animated: true)
}
//分享
func blaceRightAction() -> Void{
}
func createPageUI() {
pageViewControllerMain.view.frame = CGRect(x: 0, y: 64+33, width: SCREEN_WIDTH, height: SCREEN_HEIGHT-64-33)
pageViewControllerMain.delegate = self
pageViewControllerMain.dataSource = self
addChildViewController(pageViewControllerMain)
view.addSubview(pageViewControllerMain.view)
pageViewControllerMain.didMove(toParentViewController: self)
//添加字控制器
dataSouceControll += [pageFirst,pageTwo,pageThree,pagefouer]
// UIPageViewControllerNavigationDirection调用了此方法切换Controller的动画可以为从左往右和从右往左两种，如果animated属性设置为NO，则这个属性无效。是枚举类型，定义了以下两种通过此方法跳转的翻页方式。
//从左往右（或从下往上）：UIPageViewControllerNavigationDirectionForward;
//从左往右（或从下往上）： UIPageViewControllerNavigationDirectionReverse;
//设置默认显示控制器
pageViewControllerMain.setViewControllers([pageFirst], direction:.forward, animated: false, completion: nil)
view.gestureRecognizers = pageViewControllerMain.gestureRecognizers
///MARK--创建标题栏部分
scrollerView.frame = CGRect(x: 0, y: 64, width: SCREEN_WIDTH, height: 33)
scrollerView.showsVerticalScrollIndicator = false
scrollerView.showsHorizontalScrollIndicator = false
view.addSubview(scrollerView)
//设置滚动视图尺寸
scrollerView.contentSize = CGSize(width: SCREEN_WIDTH, height: 33)
//设置滚动标题
let arrayTitle = ["精选","直播","美妆","美搭"]
for i in 0.. UIViewController?
{
let index = self.dataSouceControll.index(of: viewController)
if (index == 0) || (index == NSNotFound) {
return nil
}
//守护，防止空值在解包时崩溃
guard let index1 = index else {
return nil
}
// 此处index必须减一
return dataSouceControll[index1 - 1]
}
//往左边滑动翻页会走此方法（类似push下去）
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController?
{
//获取当前控制器索引
let index = self.dataSouceControll.index(of: viewController)
if index == NSNotFound {
return nil
}
if (index == self.dataSouceControll.count-1) {
//防止越界,必须要设置
return nil
}
//守护，防止空值在解包时崩溃
guard let index1 = index else {
return nil
}
return dataSouceControll[index1+1]
}
// 取消pageControl，想要取消白点显示，只要不设定以下dataSource方法即可。
func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int
{
return self.dataSouceControll.count
}
//跟页码有关
func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int
{
return 0
}
// 下面一个问题,就是如何获取下一个控制器的索引, 在上面两个数据源方法里无法获取准确的索引, 而应该在下面这个方法里获取:
func pageViewController(_ pageViewController: UIPageViewController, willTransitionTo pendingViewControllers: [UIViewController]) {
let controller = pendingViewControllers[0]
self.nextIndex = self.dataSouceControll.index(of: controller)!
}
//还有一个非常有用的代理，它在动画执行完毕后被调用，在controller切换完成后，我们可以在这个代理中进行一些后续操作。例如用UIPageViewController实现轮播分页等功能。
func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
if completed {
print(self.nextIndex)
//找到所有buton
for i in 0..
