swift - 加载 Controller 后如何以编程方式添加 View

Question

我有一个 ViewController，在加载时带有隐藏 View (我们称之为 boxInsideView)。我希望这个 boxInsideView 的 Controller 或 .swift 文件在用户单击该框时触发，而不是在 View Controller 加载时触发。就像我在单击该框时创建一个 addSubview(boxInsideView) 一样。

实例化我的boxInsideView

let cajasInsideView : CajaInsideView = {
        let cajasInside = CajaInsideView()
        cajasInside.delegate = self
        return cajasInside
    }()

在 viewDidLoad() 上，我有以下代码:

scrollView.addSubview(cajasInsideView)
        scrollView.addSubview(cajasView)
        scrollView.addSubview(collectionView)

        cajasView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor, constant: 0).isActive = true
        cajasView.topAnchor.constraint(equalTo: scrollView.topAnchor, constant: 0).isActive = true
        cajasView.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true
        cajasView.heightAnchor.constraint(equalToConstant: 150).isActive = true


        if !isClosed {
            cajasInsideView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor, constant: 0).isActive = true
            cajasInsideView.autoPinEdge(.top, to: .bottom, of: cajasView, withOffset: -10)
            cajasInsideView.heightAnchor.constraint(equalToConstant: 0).isActive = true
            cajasInsideView.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true
        }

        topConstraint = NSLayoutConstraint(item: collectionView, attribute: .top, relatedBy: .equal, toItem: cajasView, attribute: .bottom, multiplier: 1, constant: 0)

        scrollView.addConstraint(topConstraint!)

        collectionView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor, constant: 0).isActive = true
        collectionView.heightAnchor.constraint(equalToConstant: 1000).isActive = true
        collectionView.widthAnchor.constraint(equalTo: scrollView.widthAnchor).isActive = true

一旦 scrollView.addSubview(cajasInsideView) 被触发，我的 .swift 文件就会被自动触发。

我想要做的是添加这个 View ，还有它的约束和单击该框时的动画。

我的openBox()函数:

@objc func openBox(){
        if isClosed {
            shareDropDown.dataSource = ["Añadir objetos a esta caja", "Añadir objeto nuevo a esta caja", "Sacar objeto de esta caja"]
            shareDropDown.selectionAction = { [unowned self] (index: Int, item: String) in
                if index == 1 {
                    let storyboard = UIStoryboard(name: "Trastero", bundle: nil)
                    let uploadTrastero = storyboard.instantiateViewController(withIdentifier:  "UploadTrasteroViewController") as! UploadTrasteroViewController
                    uploadTrastero.navigationItem.leftItemsSupplementBackButton = true
                    self.navigationController?.pushViewController(uploadTrastero, animated: true)
                }
                if index == 0 {
                    self.setMoverObjeto()
                }
                print("Selected item: \(item) at index: \(index)")
            }
            shareDropDown.width = 250
            scrollView.removeConstraint(topConstraint!)
            topConstraint = NSLayoutConstraint(item: collectionView, attribute: .top, relatedBy: .equal, toItem: cajasInsideView, attribute: .bottom, multiplier: 1, constant: 0)

            UIView.animate(withDuration: 0.5, delay:0, usingSpringWithDamping:0.7, initialSpringVelocity:0, options: .curveEaseOut, animations: {
                self.cajasInsideView.frame = CGRect(x: 0, y: self.cajasView.frame.height - 40, width: self.scrollView.frame.width, height: 360)
                self.collectionView.frame = CGRect(x: 0, y: (self.cajasView.frame.height + self.cajasInsideView.frame.height + 40), width: self.view.frame.width, height: 1000)
                self.scrollView.addConstraint(self.topConstraint!)
                self.scrollView.contentSize = CGSize(width: self.view.frame.width, height: self.headerView.frame.height + self.cajasView.frame.height + self.cajasInsideView.frame.height + self.collectionView.frame.height)

                //self.collectionView.autoPinEdge(.top, to: .bottom, of: self.cajasInsideView)
            }, completion: { (completion) in
                self.isClosed = false
            })
        }
        else{
            shareDropDown.dataSource = ["Añadir objeto", "Editar", "Crear nueva caja", "Cambiar ubicación"]
            shareDropDown.selectionAction = { [unowned self] (index: Int, item: String) in
                if index == 0 {
                    let storyboard = UIStoryboard(name: "Trastero", bundle: nil)
                    let uploadTrastero = storyboard.instantiateViewController(withIdentifier:  "UploadTrasteroViewController") as! UploadTrasteroViewController
                    uploadTrastero.navigationItem.leftItemsSupplementBackButton = true
                    self.navigationController?.pushViewController(uploadTrastero, animated: true)
                }
                if index == 1 {
                    self.setEditar()
                }
                if index == 2 {
                    self.openPopUpNewBox()
                }
                if index == 3{
                    let popupController = PopUpSetDirectionController()

                    popupController.providesPresentationContextTransitionStyle = true
                    popupController.definesPresentationContext = true
                    popupController.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext;
                    popupController.delegate = self
                    popupController.view.backgroundColor = UIColor.init(white: 0.4, alpha: 0)
                    self.present(popupController, animated: true, completion: nil)
                }
                print("Selected item: \(item) at index: \(index)")
            }
            shareDropDown.width = 170
            scrollView.removeConstraint(topConstraint!)
            topConstraint = NSLayoutConstraint(item: collectionView, attribute: .top, relatedBy: .equal, toItem: cajasView, attribute: .bottom, multiplier: 1, constant: 0)
            esMoverObjeto = false

            self.collectionView.reloadData()

            UIView.animate(withDuration: 0.5, delay:0, usingSpringWithDamping:0.7, initialSpringVelocity:0, options: .curveEaseOut, animations: {
                self.cajasInsideView.frame = CGRect(x: 0, y: self.cajasView.frame.height - 40, width: self.view.frame.width, height: 0)
                self.collectionView.frame = CGRect(x: 0, y: (self.cajasView.frame.height), width: self.view.frame.width, height: 1000)
                self.scrollView.contentSize = CGSize(width: self.view.frame.width, height: self.headerView.frame.height + self.cajasView.frame.height + self.cajasInsideView.frame.height + self.collectionView.frame.height)
                self.scrollView.addConstraint(self.topConstraint!)
            }, completion: { (completion) in
                self.isClosed = true
            })
        }
    }

Answer 1

加载 VC 后，您可以设置第二个 view.isHidden = true 的默认值。如果您点击第一个 View ，则会设置另一个 view.isHidden = false。