swift - ActivityViewController 弹出窗口不在屏幕顶部

Question

我有一个分享按钮来分享我的屏幕截图。虽然我实现了一个扩展来获取 rootViewController，但我的 ActivityViewController 的弹出窗口仍然在我想要共享屏幕截图的窗口后面，请参阅附加图片。我已经尝试在 handleShare() 中加载我的 handleDismiss() 函数，但到目前为止还没有成功。也许有人可以让我走上正轨，这里发生了什么。

非常感谢您提前。

我的统计视图的简短 gif

import UIKit

class GameStatistics: NSObject, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {

    let blackView = UIView()

    let collectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
        cv.backgroundColor = UIColor.white
        return cv
    }()

    let cellId = "cellId"
    let sectionHeader = "sectionHeader"
    let sectionFooter = "sectionFooter"

    //
    //
    //

    func showStatistics() {

        if let window = UIApplication.shared.keyWindow {
            blackView.backgroundColor = UIColor(white: 0, alpha: 0.5)

            blackView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleDismiss)))

            window.addSubview(blackView)
            window.addSubview(collectionView)

            // Dynamic Height of Collection View
            let value: CGFloat = CGFloat(statistics.count)
            let height: CGFloat = value * cellHeight + (value - 1) * cellSpacing + headerHeight + footerHeight
            let y = window.frame.height - height

            blackView.frame = window.frame
            collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: height)

            blackView.alpha = 0

            UIView.animate(withDuration: 1, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {

                self.blackView.alpha = 1
                self.collectionView.frame = CGRect(x: 0, y: y, width: self.collectionView.frame.width, height: self.collectionView.frame.height)

            }, completion: nil)
        }
    }

    @objc func handleDismiss() {
        UIView.animate(withDuration: 0.5) {
            self.blackView.alpha = 0

            if let window = UIApplication.shared.keyWindow {
                self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: self.collectionView.frame.width, height: self.collectionView.frame.height)
            }
        }
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return statistics.count
    }


    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! GameStatisticCell

        cell.statistic = statistics[indexPath.item]

        cell.layoutIfNeeded()

        //dump(statistics)
        return cell

    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: collectionView.frame.width, height: cellHeight)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return cellSpacing
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return cellSpacing
    }

    func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {

        switch  kind {

            case UICollectionElementKindSectionHeader:
                let supplementaryView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: sectionHeader, for: indexPath)

                return supplementaryView
            case UICollectionElementKindSectionFooter:
                let supplementaryView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: sectionFooter, for: indexPath)

                return supplementaryView
            default:
                fatalError("Unexpected element kind")
        }
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {

        return CGSize(width: collectionView.frame.width, height: headerHeight)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForFooterInSection section: Int) -> CGSize {

        return CGSize(width: collectionView.frame.width, height: footerHeight)
    }

    override init() {
        super.init()

        collectionView.dataSource = self
        collectionView.delegate = self

        collectionView.register(GameStatisticCell.self, forCellWithReuseIdentifier: cellId)
        collectionView.register(GameStatisticHeader.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: sectionHeader)
        collectionView.register(GameStatisticFooter.self, forSupplementaryViewOfKind: UICollectionElementKindSectionFooter, withReuseIdentifier: sectionFooter)
    }

    func handleShare() {
        if let window = UIApplication.shared.keyWindow {
            let size = CGSize(width: window.frame.width, height: window.frame.height)

            UIGraphicsBeginImageContext(size)
            window.layer.render(in: UIGraphicsGetCurrentContext()!)

            let image = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext()

            let activityViewController = UIActivityViewController(activityItems: [image!], applicationActivities: nil)
            activityViewController.popoverPresentationController?.sourceRect = CGRect(x: 0, y: 0, width: 0, height: 0)
            //UIApplication.shared.keyWindow?.rootViewController?.present(activityViewController, animated: true, completion: nil)
            UIApplication.topViewController?.present(activityViewController, animated: true, completion: nil)
        }
    }
 }

扩大

extension UIApplication {

    static var topViewController: UIViewController? {
        return UIApplication.shared.keyWindow?.rootViewController?.visibleViewController
    }
}

extension UIViewController {

    var visibleViewController: UIViewController? {
        if let navigationController = self as? UINavigationController {
            return navigationController.topViewController?.visibleViewController
        } else if let tabBarController = self as? UITabBarController {
            return tabBarController.selectedViewController?.visibleViewController
        } else if let presentedViewController = presentedViewController {
            return presentedViewController.visibleViewController
        } else {
            return self
        }
    }
}

标签： swiftpopupuiactivityviewcontrollerrootviewcontroller