如何快速关闭 SFSafariViewController答案

【问题标题】：How to dismiss a SFSafariViewController in swift如何快速关闭 SFSafariViewController
【发布时间】：2020-05-08 18:50:56
【问题描述】：

我有一个函数可以实例化并显示一个显示登录页面的 SFSafariViewController

public func authorizeSafariEmbedded(from controller: UIViewController, at url: URL) throws -> SFSafariViewController {
    safariViewDelegate = OAuth2SFViewControllerDelegate(authorizer: self)
    let web = SFSafariViewController(url: url)
    web.title = oauth2.authConfig.ui.title
    web.delegate = safariViewDelegate as! OAuth2SFViewControllerDelegate
    controller.addChild(web)
    controller.view.addSubview(web.view)
    web.didMove(toParent: controller)
    web.view.translatesAutoresizingMaskIntoConstraints = false
    if #available(iOS 11.0, *) {
        web.view.topAnchor.constraint(equalTo: controller.view.safeAreaLayoutGuide.topAnchor, constant: 30).isActive = true
        web.view.bottomAnchor.constraint(equalTo: controller.view.safeAreaLayoutGuide.bottomAnchor, constant: -30).isActive = true
        web.view.leadingAnchor.constraint(equalTo: controller.view.safeAreaLayoutGuide.leadingAnchor, constant: 30).isActive = true
        web.view.trailingAnchor.constraint(equalTo: controller.view.safeAreaLayoutGuide.trailingAnchor, constant: -30).isActive = true
    } else {
        // Fallback on earlier versions
    }
    if #available(iOS 10.0, *), let barTint = oauth2.authConfig.ui.barTintColor {
        web.preferredBarTintColor = barTint
    }
    if #available(iOS 10.0, *), let tint = oauth2.authConfig.ui.controlTintColor {
        web.preferredControlTintColor = tint
    }
    web.modalPresentationStyle = .fullScreen

    willPresent(viewController: web, in: nil)
    //controller.present(web, animated: true)

    return web
}

就是这样叫safariVC = try authorizer.authorizeSafariEmbedded(from: self,at: url!) 你会注意到我不使用 present 因为它会导致我的应用程序像那样崩溃 Application tried to present modally an active controller

登录完成后调用此函数，这里我想关闭 SFSafariViewController 所以我这样做

func hideSafariView(){
    print ("sf \(safariVC)")
    if safariVC != nil {
        print("dissmis")
        safariVC!.dismiss(animated: true, completion: nil)
    }
}

但它不起作用

【问题讨论】：

controller.view.addSubview(web.view) 首先你在你的控制器中添加那个控制器？然后想介绍...我可以知道这背后的逻辑吗？
safariVC 是否设置过？
实际上它对我来说也没有任何意义，但如果我删除喜欢 web.view.topAnchor.constraint(...).isActive = true 的行，我会得到一个空白屏幕，如果我添加这些行，它只能工作 controller.view.addSubview(web.view) SafariVC 仅设置在代码safariVC = try authorizer...
如果我评论 controller.addChild(web) 并取消评论 controller.present(web, animated: true) (pastebin.com/RQ5PVq9P) 我有一个标题为“站点名称”的窗口

标签： swift sfsafariviewcontroller

【解决方案1】：

我找到了解决办法

我只需要这样做：

func hideSafariView(){
    if safariVC != nil {
        print("dissmis")
        safariVC?.removeFromParent()
        safariVC!.dismiss(animated: true, completion: nil)
        safariVC!.view.removeFromSuperview()
    }
}

【讨论】：