如何弹出 UIViewController答案

【问题标题】：How to pop-over a UIViewController如何弹出 UIViewController
【发布时间】：2018-05-22 02:14:06
【问题描述】：

我正在尝试获得 UIViewController 过渡效果，其中 ViewControllerB 在 ViewContorllerA 上弹出，同时仍然在后台显示 ViewcontrllerA。知道我怎么能做到这一点吗？

过渡：

【问题讨论】：

标签： ios user-interface uiviewcontroller transitions uiviewanimationtransition

【解决方案1】：

!1.创建一个uiview

@IBOutlet weak var viewTemp: UIView!

!2.定位

let theScreenWidth = self.view.frame.size.width
let theScreenHeight = self.view.frame.height
viewTemp.frame = CGRect(x: 0, y: theScreenHeight+64, width: theScreenWidth, height: theScreenHeight-64)

!3.使用动画打开

UIView.animate(withDuration: 0.5, delay: 0, options: .curveLinear, animations: {
    viewTemp.transform = CGAffineTransform(translationX: 0, y: -self.view.frame.height)
}) { (success: Bool) in
}

!4.使用动画关闭

UIView.animate(withDuration: 0.5, delay: 0, options: .curveLinear, animations: {
    viewTemp.transform = CGAffineTransform(translationX: 0, y: self.view.frame.height)
}) { (success: Bool) in
}

【讨论】：

【解决方案2】：

试试这个。在情节提要上创建一个视图控制器，将类设置为 CustomDialog。将视图添加到此视图控制器，这将是您在弹出窗口中想要的。如果您希望对话框丢失，请调用 confirmBlock() 或 cancelBlock()。

//自定义对话框类

import Foundation

class CustomDialog: UIViewController, UIGestureRecognizerDelegate {

    var confirmBlock: ((_ result: AnyObject) -> ())?
    var cancelBlock: (() -> ())?

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        definesPresentationContext = true
        providesPresentationContextTransitionStyle = true
        modalPresentationStyle = .overFullScreen
        modalTransitionStyle = .crossDissolve
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        makeBlurBackground()
        let tapDismiss = UITapGestureRecognizer(target: self, action: #selector(BaseCustomDialog.tapOutside))
        tapDismiss.delegate = self
        view.addGestureRecognizer(tapDismiss)
        view.tag = GestureRecognizerUniqueTag
    }

    @objc fileprivate func tapOutside() {
        cancelAction()
    }

    func makeBlurBackground() {
        let effectView = UIView(frame: self.frame)
        effectView.backgroundColor = ClickUpConstants.defaultTransparentBackgroundColor
        effectView.isUserInteractionEnabled = false

        view.addSubview(effectView)
        view.sendSubview(toBack: effectView)

    }

    func confirmAction(_ result: AnyObject) {
    confirmBlock?(result)
        cleanupAndDismiss()
    }

    func cancelAction() {
        cancelBlock?()
        cleanupAndDismiss()
    }

    fileprivate func cleanupAndDismiss() {
        self.view.endEditing(true)

        dismiss(animated: true) { () -> Void in
            self.confirmBlock = nil
            self.cancelBlock = nil
        }
    }
}

如何调用对话框（即：按下按钮时）

let dialog = UIStoryboard(name: "CustomDialogs", bundle: nil).instantiateViewController(withIdentifier: customDialog") as! CustomDialog
let navigationController = UINavigationController(rootViewController: dialog)
navigationController.isNavigationBarHidden = true


dialog.cancelBlock = {
    //do something when cancel
    dialog.dismiss(animated: true, completion: nil)
}

dialog.confirmBlock = {
//do something when cancel
    dialog.dismiss(animated: true, completion: nil)
}

self.present(navigationController, animated: true, completion: nil)

【讨论】：