前言

项目中做的一个Swift版本的翻牌动画，在自定义Window弹窗基础上，使用transition动画实现。

效果图

翻牌

1.弹窗部分

弹窗考虑到解耦和使用便捷，采取自定义Window来实现，所有弹窗由一个可销毁单例来统一管理，这样可以很容易管理每个弹窗，也方便扩展其他类型的弹窗，当所有弹窗都全部销毁后，单例自行销毁
弹窗核心代码

//MARK: - 弹窗管理者
@objcMembers class CLPopupManager: NSObject {
    private static var manager: CLPopupManager?
    private class var share: CLPopupManager {
        get {
            guard let shareManager = manager else {
                manager = CLPopupManager()
                return manager!
            }
            return shareManager
        }
    }
    private var windowsDictionary = [String : CLPopupManagerWindow]()
    private override init() {
        super.init()
    }
    deinit {
//        CLLog("=====  \(self.classForCoder) deinit  =====")
    }
}
extension CLPopupManager {
    /// 显示自定义弹窗
    private class func showController(_ controller: CLPopupManagerController) {
        DispatchQueue.main.async {
            if controller.configure.isDisplacement {
                share.windowsDictionary.removeAll()
            }
            let window = CLPopupManagerWindow(frame: UIScreen.main.bounds)
            window.isPassedDown = controller.configure.isPassedDown
            window.windowLevel = UIWindow.Level.statusBar
            window.isUserInteractionEnabled = true
            window.rootViewController = controller
            window.makeKeyAndVisible()
            share.windowsDictionary[controller.configure.identifier] = window
        }
    }
    /// 隐藏所有弹窗
    class func dismissAll() {
        DispatchQueue.main.async {
            share.windowsDictionary.removeAll()
            manager = nil
        }
    }
    ///隐藏指定弹窗
    class func dismiss(_ identifier : String) {
        DispatchQueue.main.async {
            share.windowsDictionary.removeValue(forKey: identifier)
            if share.windowsDictionary.isEmpty {
                dismissAll()
            }
        }
    }
}

2.动画部分

动画的核心采取系统transition动画实现，加上其他基础动画组合而成

    func transition(withDuration duration: TimeInterval, completion: (() -> Void)?) {
        guard let top = topView, let bottom = bottomView else {
            return
        }
        if isTurning {
            return
        }
        isTurning = true
        if isReversed {
            UIView.transition(from: bottom, to: top, duration: duration, options: .transitionFlipFromLeft) { _ in
                completion?()
                self.isTurning = false
                self.isReversed = false
            }
        } else {
            UIView.transition(from: top, to: bottom, duration: duration, options: .transitionFlipFromRight) { _ in
                completion?()
                self.isTurning = false
                self.isReversed = true
            }
        }
    }

3.其他弹窗

可拖拽弹窗
按钮弹窗

总结

核心代码已经贴出，完整代码请查看----->>>CLDemo，如果对你有所帮助，欢迎Star。