公共类(框架)

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        
        //创建window
        self.window = UIWindow.init(frame: UIScreen.mainScreen().bounds)
        self.window?.backgroundColor = UIColor.whiteColor()
        
        //创建根视图控制器
        self.creatViewControllers()
        
        //定制状态栏
        self.statusBarSetting()
        
        return true
    }
    
    //MARK: - 定制状态栏
    func statusBarSetting(){
        
        UIApplication.sharedApplication().statusBarStyle = .LightContent
    }
    
    //MARK: - 创建主框架视图控制器
    func creatViewControllers() {
        
        //标签栏控制器
        let tabBarC = YTTabBarController()
        
        //1.首页
        let nav1 = YTNavigationController(rootViewController: MainPageViewController())
        tabBarC.addController(nav1, title: "首页", imageName: "label_bar_movie_normal", selectImageName: "agnes-overjoyed-icon")
        
        //2.影评
        let nav2 = YTNavigationController(rootViewController: FilmCommentViewController())
        tabBarC.addController(nav2, title: "影评", imageName: "label_bar_film_critic_normal", selectImageName: "evil-minion-icon-2")
        
        //3.影单
        let nav3 = YTNavigationController(rootViewController: FilmListViewController())
        tabBarC.addController(nav3, title: "影单", imageName: "label_bar_film_list_normal", selectImageName: "margo-dispicable-me-2-icon")
        
        //4.我
        let nav4 = YTNavigationController(rootViewController: MeViewController())
        tabBarC.addController(nav4, title: "我", imageName: "label_bar_my_normal", selectImageName: "gru-icon-2")
        
        //设置tabBar上的文字颜色
        tabBarC.yt_tabBar.titleColor = UIColor.blackColor()
        
        self.window?.rootViewController = tabBarC
        
    }

///封装四个模块的主页上的导航条上共有的左右item，以及其功能
class BasicViewController: YTViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationBarItemSetting()
    }

    

}

//MARK: - 界面相关
extension BasicViewController{
    
    override func navigationBarItemSetting() {
        
        //1.添加左右两边的item
        //左
        let leftItem = UIBarButtonItem.init(image:UIImage.init(named: "lineposter_lines_adding"), style: .Done, target: self, action: "menuItemAction:")
        self.navigationItem.leftBarButtonItem = leftItem
        //右
        let rightItem = UIBarButtonItem.init(image: UIImage.init(named: "movie_all_search_light"), style: .Done, target: self, action: "searchItemAction:")
        self.navigationItem.rightBarButtonItem = rightItem
        
    }
}

//MARK: - 按钮点击
extension BasicViewController{
    
    //搜索按钮被点击
    func searchItemAction(item:UIBarButtonItem) {
        
        //跳转到搜索界面
        let searchC = SearchViewController()
        searchC.hidesBottomBarWhenPushed = true
        
        self.navigationController?.pushViewController(searchC, animated: true)
        
    }
    
    //导航条上的菜单按钮被点击
    func menuItemAction(item:UIBarButtonItem){
        
        
    }
}

class MainPageViewController: BasicViewController {
    //MARK: - 属性
    //1.滚动视图
    let scrollView = UIScrollView()
    //2.分段选择器
    var segment:YTSegmentControl!

    //MARK: - 生命周期
    override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationBarItemSetting()
        self.creatUI()
    }

}

//MARK: - 界面相关
extension MainPageViewController{
    
    override func creatUI() {
        super.creatUI()
        //1.创建滚动视图
        //设置frame
        self.scrollView.frame = self.view.bounds
        //设置内容大小
        self.scrollView.contentSize = CGSizeMake(Screen_W*2,scrollView.frame.size.height-64-49)
        //设置分页
        self.scrollView.pagingEnabled = true
        //设置代理
        self.scrollView.delegate = self
        //隐藏滚动条
        self.scrollView.showsHorizontalScrollIndicator = false
        //显示在界面上
        self.view.addSubview(self.scrollView)
        
        //2.添加热映界面
        let hotC = HotShowViewController()
        self.addChildViewController(hotC)
        hotC.tableView.frame = CGRectMake(0, 0,self.scrollView.frame.size.width, self.scrollView.frame.size.height)
        self.scrollView.addSubview(hotC.tableView)
        
        //3.添加预告界面
        let reailerC = TrailerTableViewController()
        self.addChildViewController(reailerC)
        reailerC.tableView.frame = CGRectMake(self.scrollView.frame.size.width, 0, self.scrollView.frame.size.width, self.scrollView.frame.size.height)
        self.scrollView.addSubview(reailerC.tableView)
        
        
    }

    override func navigationBarItemSetting() {
        super.navigationBarItemSetting()
        
        //1.中间的item
        //创建分段选择器对象
        self.segment = YTSegmentControl.init(items: ["热映","预告"])
        //设置frame
        self.segment.frame = CGRectMake(0, 0, 100, 44)
        //添加到导航条上
        self.navigationItem.titleView = self.segment
        //设置正常和选中的文字颜色
        self.segment.titleSelectedColor = UIColor.whiteColor()
        self.segment.titleColor = UIColor.whiteColor()
        //设置正常状态和选中的字体
        self.segment.selectedFont = UIFont.boldSystemFontOfSize(15)
        self.segment.normalFont = UIFont.systemFontOfSize(12)
        //设置滑块的颜色
        self.segment.sliderColor = UIColor.yellowColor()
        //添加事件
        self.segment.addTarget(self, action: "segmentAction:")
        
        
    }
}

//MARK: - scrollView Delegate
extension MainPageViewController:UIScrollViewDelegate{

    //停止滚动
    func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
        
        //切换分段选择器
        if scrollView.contentOffset.x == 0 {
            self.segment.selectedSegmentIndex = 0
            return
        }
        self.segment.selectedSegmentIndex = 1
    }
}

//MARK: - 按钮点击
extension MainPageViewController{
    
    func segmentAction(segment:YTSegmentControl){
        
        if segment.selectedSegmentIndex == 0 {
            
            print("热映被选中")
            self.scrollView.contentOffset = CGPointMake(0, 0)
        }else{
        
            print("预告被选中")
            self.scrollView.contentOffset = CGPointMake(self.scrollView.frame.width, 0)
        }
    }
}

YTTabBarController

class YTTabBar: UIView {

    
    //MARK: - 属性
    ///1.当前选中的下标
    var selectedIndex = 1
    
    ///2.声明闭包用来传值
    var changeSelectedIndex:((Int)->Void)? = nil
    
    ///3.设置按钮的文字颜色
    var titleColor = UIColor.blackColor()
    
}

//MARK: - 添加按钮
extension YTTabBar{

    ///添加按钮
    func addButtonWithItem(item:UITabBarItem) {
        
        //创建按钮
        let btn = YTTabBarButton(tabBarItem: item)
        //添加点击事件
        btn.addTarget(self, action: "btnAction:")
        
        //设置按钮的tag值
        btn.tag = 100+self.subviews.count
        
//        //判断是否是需要选中按钮
//        if self.selectedIndex == self.subviews.count{
//            
//            btn.isSelected = true
//        }
        
        //添加到界面上
        self.addSubview(btn)
    }
}

//MARK: - 按钮点击
extension YTTabBar{

    func btnAction(btn:YTTabBarButton){
        
        //将原来处于选中状态的按钮变成非选中状态
        let selectBtn = self.viewWithTag(100+self.selectedIndex) as! YTTabBarButton
        selectBtn.isSelected = false
        
        //将当前按下的按钮变成选中状态
        btn.isSelected = true
        //更新选中下标
        self.selectedIndex = btn.tag - 100
        
        //通知tabBarController切换视图控制器
        self.changeSelectedIndex!(self.selectedIndex)
        
    }
}

//MARK: - 计算子视图的frame
extension YTTabBar{

    override func layoutSubviews() {
        super.layoutSubviews()
        
        //通用
        let btnW = self.frame.size.width / CGFloat(self.subviews.count)
        let btnH = self.frame.size.height
        let btnY:CGFloat = 0
        
        //遍历拿到所有的按钮
        for (i,item) in self.subviews.enumerate() {
            
            let btn = item as! YTTabBarButton
            
            let btnX = CGFloat(i) * btnW
            //1.设置frame
            item.frame = CGRectMake(btnX, btnY, btnW, btnH)
            
            //2.设置默认选中的按钮
            if i == self.selectedIndex {
                
                btn.isSelected = true
            }
            //3.设置按钮颜色
            btn.titleLabel.textColor = self.titleColor
            
        }
        
        
        
    }
}

import UIKit

//自定义控件:
//1.声明所有的子视图的属性
//2.在构造方法中将子视图添加到界面上
//3.计算子视图的frame


//1.小图
//2.文字
//3.大图
class YTTabBarButton: UIView {

    //MARK: - 属性
    //1.小图
    let smallImageView = UIImageView()
    //2.文字
    let titleLabel = UILabel()
    //3.大图
    let bigImageView = UIImageView()
    
    ///4.按钮的状态
    var isSelected = false{
    
        didSet{
            
            if isSelected == true {
                self.bigImageView.hidden = false
                self.smallImageView.hidden = true
                self.titleLabel.hidden = true
                
            }else{
                self.bigImageView.hidden = true
                self.smallImageView.hidden = false
                self.titleLabel.hidden = false
            }
        }
    }
    
    //5.保存添加事件相关属性
    var target: AnyObject? = nil
    var action: Selector? = nil
    

    //MARK: - 构造方法
    init(tabBarItem:UITabBarItem){
        super.init(frame: CGRectZero)
        //1.小图
        self.addSubview(self.smallImageView)
        self.smallImageView.image = tabBarItem.image
        self.smallImageView.contentMode = .Center
        //2.文字
        self.addSubview(self.titleLabel)
        self.titleLabel.font = UIFont.systemFontOfSize(11)
        self.titleLabel.text = tabBarItem.title
        self.titleLabel.textAlignment = .Center
        //3.大图
        self.addSubview(self.bigImageView)
        self.bigImageView.image = tabBarItem.selectedImage
        self.bigImageView.contentMode = .Center
        self.bigImageView.hidden = true
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
}

//MARK: - 添加点击事件
extension YTTabBarButton{

    ///添加事件
    func addTarget(target:AnyObject,action:Selector){
        
        self.target = target
        self.action = action
    }
    
    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        
        if self.target == nil {
            return
        }
        
         if (self.target!.respondsToSelector(self.action!) == true){
        
            self.target!.performSelector(self.action!, withObject: self)
        }else{
        
            print("按钮点击方法没有实现")
        }
        
    }
    
    
}

//MARK: - 计算frame
extension YTTabBarButton{

    override func layoutSubviews() {
        super.layoutSubviews()
        
        //通用
        let btnW = self.frame.size.width
        let btnH = self.frame.size.height
        let imageProportion = CGFloat(4)/5
        let beyondH:CGFloat = 25
        //1.小图
        let smallX:CGFloat = 0
        let smallY:CGFloat = 0
        let smallW = btnW
        let smallH = btnH * imageProportion - 2
        self.smallImageView.frame = CGRectMake(smallX, smallY, smallW, smallH)
        //2.文字
        let titleX: CGFloat = 0
        let titleY: CGFloat = smallH
        let titleW = btnW
        let titleH = btnH * (1 - imageProportion)
        self.titleLabel.frame = CGRectMake(titleX, titleY, titleW, titleH)
        //3.大图
        let bigX: CGFloat = 0
        let bigY = -beyondH
        let bigW = btnW
        let bigH = btnH + beyondH
        self.bigImageView.frame = CGRectMake(bigX, bigY, bigW, bigH)
        
        
        //判断当前按钮是否处于选中状态
        if self.isSelected {
            
            self.bigImageView.hidden = false
        }
        
        //设置文字颜色
        self.titleLabel.textColor = UIColor.blackColor()
        
    }
}

class YTTabBarController: UITabBarController {
    
    //MARK: - 属性
    lazy var yt_tabBar:YTTabBar = {
    
        //自己定义的tabBar的大小和系统自带的tabBar的大小一样
        let tempTabBar = YTTabBar(frame:self.tabBar.bounds)
        
        //点击tabBar上的按钮去切换视图控制器
        tempTabBar.changeSelectedIndex = {(index)in
        
            //切换到指定的视图控制器
            self.selectedIndex = index
        }
        
        //将自定义的tabBar贴到系统的tabBar上
        self.tabBar.addSubview(tempTabBar)
        
        
        return tempTabBar
    }()

    //MARK: - 生命周期
    override func viewDidLoad() {
        super.viewDidLoad()
        
       

    }
    
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        
        //设置默认选中的按钮
        self.yt_tabBar.selectedIndex = self.selectedIndex
        
        //改变文字颜色
        self.yt_tabBar.titleColor = UIColor.lightGrayColor()
        
        //移除tabBar上自动添加的所有的子视图
        for item in self.tabBar.subviews {
            //判断子视图的类型是否是YTTabBar
            //isKindOfClass判断指定的对象是否是指定的类型
            if item.isKindOfClass(YTTabBar.self) {
                continue
            }
            
            //将不是YTTabBar的从系统的tabBar上移除
            item.removeFromSuperview()
            
        }
        
    }
    
    
}

//MARK: - 添加子视图控制器
extension YTTabBarController{
    
    ///添加子视图控制器
    func addController(controller:UIViewController,title:String,imageName:String,selectImageName:String){
        
        //设置视图控制器对一个的tabBarItem
        controller.tabBarItem.title = title
        controller.tabBarItem.image = UIImage.init(named: imageName)?.imageWithRenderingMode(.AlwaysOriginal)
        controller.tabBarItem.selectedImage = UIImage.init(named: selectImageName)?.imageWithRenderingMode(.AlwaysOriginal)
        //将视图控制器添加到tabBarController中
        self.addChildViewController(controller)
        
        //在yt_tabBar上创建对应按钮
        self.yt_tabBar.addButtonWithItem(controller.tabBarItem)
        
    }
}