view 翻页动画

//
//  ViewTransitionViewControllerViewController.swift
//  MFEfficiencyControl
//
//  Created by changyou on 2022/4/22.
//
//  view 翻页动画：微信读书的仿真动画就是这样实现的？

import UIKit

class ViewTransitionViewControllerViewController: UIViewController {

    
    lazy var containerView: UIView = {
        let containerView = UIView(frame: CGRect(x: 30,y: 100,width: 200,height: 300))
        view.addSubview(containerView)
        containerView.backgroundColor = .gray
        return containerView
    }()
    
    lazy var redView: UIView = {
        let redView = UIView(frame: CGRect(x: 0,y: 0,width: 200,height: 300))
        view.addSubview(redView)
        redView.backgroundColor = .gray
        return redView
    }()
    
    lazy var orangeView: UIView = {
        let orangeView = UIView(frame: CGRect(x: 0,y: 0,width: 200,height: 300))
        view.addSubview(orangeView)
        orangeView.backgroundColor = .gray
        return orangeView
    }()
    
    
    enum ViewType {
        case orange
        case red
    }
    
    var currentType: ViewType = .orange
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        containerView.addSubview(redView)
        redView.frame.size = containerView.frame.size
        redView.frame.origin = CGPoint(x: 0, y: 0)
        
        containerView.addSubview(orangeView)
        orangeView.frame.size = containerView.frame.size
        orangeView.frame.origin = CGPoint(x: 0, y: 0)
        
    }
    

    @IBAction func transitionView(_ sender:Any) {
        
        switch currentType {
            
        case .orange:
            
            UIView.transition(with: containerView, duration: 1.0,options: [.transitionCurlUp],animations: {
                
                self.orangeView.removeFromSuperview()
                
                self.containerView.addSubview(self.redView)
                
            }) { (success) in
                
                self.currentType = .red
                
            }
        case .red:
            
            UIView.transition(with: containerView, duration: 1.0,options: [.transitionCurlUp],animations: {
                
                self.redView.removeFromSuperview()
                
                self.containerView.addSubview(self.orangeView)
                
            }) { (success) in
                
                self.currentType = .orange
                
            }
            
        }
    }

}