【iOS】Swift ESTabBarController的使用

之前也使用Swift编写过程序，但是由于是多人开发，我没有从头搭建，而且之前写的项目也是多使用oc的库。我就打算从头抓包写一个纯Swift的APP。我打算先写一个简单的APP，熟练之后在写比较复杂的APP。具体代码之后会传到我的github上面。

在搭建框架的时候发现了这个swift编写的tabbar控制器。用起来感觉不错。他可以高度自定义。具体效果可以看官方文档。

但是他还是有一些不足的。这是暂时不支持的功能

/*
 * ESTabBarItem继承自UITabBarItem，目的是为ESTabBarItemContentView提供UITabBarItem属性的设置。
 * 目前支持大多常用的属性，例如image, selectedImage, title, tag 等。
 *
 * Unsupport properties:
 *  MARK: UIBarItem properties
 *      1. var isEnabled: Bool
 *      2. var landscapeImagePhone: UIImage?
 *      3. var imageInsets: UIEdgeInsets
 *      4.  var landscapeImagePhoneInsets: UIEdgeInsets
 *      5. func setTitleTextAttributes(_ attributes: [String : Any]?, for state: UIControlState)
 *      6. func titleTextAttributes(for state: UIControlState) -> [String : Any]?
 *  MARK: UITabBarItem properties
 *      7. var titlePositionAdjustment: UIOffset
 *      8. func setBadgeTextAttributes(_ textAttributes: [String : Any]?, for state: UIControlState)
 *      9. func badgeTextAttributes(for state: UIControlState) -> [String : Any]?
 */

如果你需要上面的功能，就可以停止往下看了。

你既然看到了这里就说明你需要使用这个库。现把使用方法列出。

1. 系统原生（通过tintColor修改选中颜色）

　　　　　let tabBarController = ESTabBarController()
        let v1 = HomeViewController()
        let v2 = HomeViewController()
        let v3 = HomeViewController()
        let v4 = HomeViewController()
        let v5 = HomeViewController()
        
        /// MARK: 使用原生 
        v1.tabBarItem = UITabBarItem.init(title: "", image: UIImage(named: "btn_home"), selectedImage: UIImage(named: "btn_home_highlight"))
        v2.tabBarItem = UITabBarItem.init(title: "", image: UIImage(named: "btn_category"), selectedImage: UIImage(named: "btn_category_highlight"))
        v3.tabBarItem = UITabBarItem.init(title: "", image: UIImage(named: "btn_rank"), selectedImage: UIImage(named: "btn_rank_highlight"))
        v4.tabBarItem = UITabBarItem.init(title: "", image: UIImage(named: "btn_random"), selectedImage: UIImage(named: "btn_random_highlight"))
        v5.tabBarItem = UITabBarItem.init(title: "", image: UIImage(named: "btn_favourite"), selectedImage: UIImage(named: "btn_favourite_highlight"))
       
　　　　 UITabBar.appearance().tintColor = UIColor.red 
        tabBarController.tabBar.shadowImage = nil
        tabBarController.viewControllers = [v1, v2, v3, v4, v5]
        
　　　　 // 不需要导航栏的话 直接 rootviewcontroller = tabBarController

        let navigationController = UINavigationController.init(rootViewController: tabBarController) 
　　　   APP_DELEGATE?.window?.rootViewController = navigationController

2. ESTabBarController仿系统原生（设置tintColor没反应）

        let tabBarController = ESTabBarController()
        let v1 = HomeViewController()
        let v2 = HomeViewController()
        let v3 = HomeViewController()
        let v4 = HomeViewController()
        let v5 = HomeViewController()
        
        /// MARK: 仿原生 设置 但是不能修改选中颜色 （设置了tintcolor 没反应）
        v1.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_home"), selectedImage: UIImage(named: "btn_home_highlight"))
        v2.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_category"), selectedImage: UIImage(named: "btn_category_highlight"))
        v3.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_rank"), selectedImage: UIImage(named: "btn_rank_highlight"))
        v4.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_random"), selectedImage: UIImage(named: "btn_random_highlight"))
        v5.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_favourite"), selectedImage: UIImage(named: "btn_favourite_highlight"))
        tabBarController.viewControllers = [v1, v2, v3, v4, v5]
        
        let navigationController = UINavigationController.init(rootViewController: tabBarController)
        APP_DELEGATE?.window?.rootViewController = navigationController

3.系统和ESTabBarController混合使用（设置tintColor只对系统的有效）

　　 　  let tabBarController = ESTabBarController()
        let v1 = HomeViewController()
        let v2 = HomeViewController()
        let v3 = HomeViewController()
        let v4 = HomeViewController()
        let v5 = HomeViewController()
        
        /// MARK: 原生和系统混和设置  不常见
        v1.tabBarItem = UITabBarItem.init(title: "", image: UIImage(named: "btn_home"), selectedImage: UIImage(named: "btn_home_highlight"))
        v2.tabBarItem = UITabBarItem.init(title: "", image: UIImage(named: "btn_category"), selectedImage: UIImage(named: "btn_category_highlight"))
        v3.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_rank"), selectedImage: UIImage(named: "btn_rank_highlight"))
        v4.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_random"), selectedImage: UIImage(named: "btn_random_highlight"))
        v5.tabBarItem = ESTabBarItem.init(title: "", image: UIImage(named: "btn_favourite"), selectedImage: UIImage(named: "btn_favourite_highlight"))
        
        UITabBar.appearance().tintColor = UIColor.red;
        tabBarController.viewControllers = [v1, v2, v3, v4, v5]
        
        let navigationController = UINavigationController.init(rootViewController: tabBarController)
        APP_DELEGATE?.window?.rootViewController = navigationController

4.带导航栏的Tab设置。

   // 设置导航栏的方法有两种 一种是像上面的一样     只设置一次导航栏

// 另一种则是每个控制器自己设置导航栏 
        let tabBarController = ESTabBarController()
        let v1 = HomeViewController()
        let v2 = HomeViewController()
        let v3 = HomeViewController()
        let v4 = HomeViewController()
        let v5 = HomeViewController()
        
        v1.tabBarItem = ESTabBarItem.init(title: "Home", image: UIImage(named: "home"), selectedImage: UIImage(named: "home_1"))
        v2.tabBarItem = ESTabBarItem.init(title: "Find", image: UIImage(named: "find"), selectedImage: UIImage(named: "find_1"))
        v3.tabBarItem = ESTabBarItem.init(title: "Photo", image: UIImage(named: "photo"), selectedImage: UIImage(named: "photo_1"))
        v4.tabBarItem = ESTabBarItem.init(title: "Favor", image: UIImage(named: "favor"), selectedImage: UIImage(named: "favor_1"))
        v5.tabBarItem = ESTabBarItem.init(title: "Me", image: UIImage(named: "me"), selectedImage: UIImage(named: "me_1"))
        
        let n1 = UINavigationController.init(rootViewController: v1)
        let n2 = UINavigationController.init(rootViewController: v2)
        let n3 = UINavigationController.init(rootViewController: v3)
        let n4 = UINavigationController.init(rootViewController: v4)
        let n5 = UINavigationController.init(rootViewController: v5)
        
        v1.title = "Home"
        v2.title = "Find"
        v3.title = "Photo"
        v4.title = "List"
        v5.title = "Me"
        
        tabBarController.viewControllers = [n1, n2, n3, n4, n5]
        APP_DELEGATE?.window?.rootViewController = tabBarController                

5.使用自定义选中颜色的ESTabBarController

自定义使用ESTabBarController需要使用这个方法。这个方法是使用自定义属性的方法。使用它可以设置自定义选中颜色、设置选中的动画效果、设置选中后的不同效果等。

官方demo中已经有了这样的效果，我们只需要把我们需要的功能写个继承ESTabBarItemContentView的子类或者直接导入所需要的效果

 public init(_ contentView: ESTabBarItemContentView = ESTabBarItemContentView(), title: String? = nil, image: UIImage? = nil, selectedImage: UIImage? = nil, tag: Int = 0)

        let tabBarController = ESTabBarController()
        let v1 = ExampleViewController()
        let v2 = ExampleViewController()
        let v3 = ExampleViewController()
        let v4 = ExampleViewController()
        let v5 = ExampleViewController()
        v1.tabBarItem = ESTabBarItem.init(ExampleBasicContentView(), title: "Home", image: UIImage(named: "home"), selectedImage: UIImage(named: "home_1"))
        v2.tabBarItem = ESTabBarItem.init(ExampleBasicContentView(), title: "Find", image: UIImage(named: "find"), selectedImage: UIImage(named: "find_1"))
        v3.tabBarItem = ESTabBarItem.init(ExampleBasicContentView(), title: "Photo", image: UIImage(named: "photo"), selectedImage: UIImage(named: "photo_1"))
        v4.tabBarItem = ESTabBarItem.init(ExampleBasicContentView(), title: "Favor", image: UIImage(named: "favor"), selectedImage: UIImage(named: "favor_1"))
        v5.tabBarItem = ESTabBarItem.init(ExampleBasicContentView(), title: "Me", image: UIImage(named: "me"), selectedImage: UIImage(named: "me_1"))
        
        tabBarController.viewControllers = [v1, v2, v3, v4, v5]
        
        let navigationController = ExampleNavigationController.init(rootViewController: tabBarController)
        tabBarController.title = "Example"
        return navigationController

5.自定义选中效果

使用方法和上面的自定义选中颜色一致。

具体可看：ExampleBasicContentView（选中颜色）

　　　　   ExampleBouncesContentView（选中弹簧缩放效果）

               ExampleHighlightableContentView

　　　　　ExampleBackgroundContentView（自定义背景）

6.不规则中部大按钮

导入ExampleIrregularityBasicContentView 或者仿写这个。

        let tabBarController = ESTabBarController()
        tabBarController.delegate = delegate
        tabBarController.title = "Irregularity"
        tabBarController.tabBar.shadowImage = UIImage(named: "transparent")
        tabBarController.tabBar.backgroundImage = UIImage(named: "background_dark")
        tabBarController.shouldHijackHandler = {
            tabbarController, viewController, index in
            if index == 2 {
                return true
            }
            return false
        }
        tabBarController.didHijackHandler = {
            [weak tabBarController] tabbarController, viewController, index in
            
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
                let alertController = UIAlertController.init(title: nil, message: nil, preferredStyle: .actionSheet)
                let takePhotoAction = UIAlertAction(title: "Take a photo", style: .default, handler: nil)
                alertController.addAction(takePhotoAction)
                let selectFromAlbumAction = UIAlertAction(title: "Select from album", style: .default, handler: nil)
                alertController.addAction(selectFromAlbumAction)
                let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
                alertController.addAction(cancelAction)
                tabBarController?.present(alertController, animated: true, completion: nil)
            }
        }
        
        let v1 = ExampleViewController()
        let v2 = ExampleViewController()
        let v3 = ExampleViewController()
        let v4 = ExampleViewController()
        let v5 = ExampleViewController()
        
        v1.tabBarItem = ESTabBarItem.init(ExampleIrregularityBasicContentView(), title: "Home", image: UIImage(named: "home"), selectedImage: UIImage(named: "home_1"))
        v2.tabBarItem = ESTabBarItem.init(ExampleIrregularityBasicContentView(), title: "Find", image: UIImage(named: "find"), selectedImage: UIImage(named: "find_1"))
        v3.tabBarItem = ESTabBarItem.init(ExampleIrregularityContentView(), title: nil, image: UIImage(named: "photo_verybig"), selectedImage: UIImage(named: "photo_verybig"))
        v4.tabBarItem = ESTabBarItem.init(ExampleIrregularityBasicContentView(), title: "Favor", image: UIImage(named: "favor"), selectedImage: UIImage(named: "favor_1"))
        v5.tabBarItem = ESTabBarItem.init(ExampleIrregularityBasicContentView(), title: "Me", image: UIImage(named: "me"), selectedImage: UIImage(named: "me_1"))
        
        tabBarController.viewControllers = [v1, v2, v3, v4, v5]
        
        let navigationController = ExampleNavigationController.init(rootViewController: tabBarController)
        tabBarController.title = "Example"
        APP_DELEGATE?.window?.rootViewController = tabBarController

7.使用Lottie

在开发中我们也会遇到一些动画效果APP不好实现，但是UI可以轻松实现的情况。这时候我们可以使用lottie来实现这个效果。ESTabBarController也支持使用Lottie。只需要到入ExampleLottieAnimateBasicContentView就可以了。

demo里面还有其他例子（像tabbar上有more（原生、ESTabBarController、混合使用），通知，添加自定义提醒框等）。不常见我也就不码了。有这样的需求可以自己看代码。