SFSafariViewController 加载空白白页

Question

我正在使用 SFSafariViewController 在我的 iOS 应用程序中打开一个 URL。它在 iOS 9 上运行良好，但在将我的设备更新到 iOS 10 后，它只会加载地址栏中没有 URL 的空白页面。即使 safariViewController(controller: SFSafariViewController, didCompleteInitialLoad didLoadSuccessfully: Bool) 在控制器出现后也没有被调用。

我已经在视图控制器中导入了这个：

import SafariServices

代码：

let url = NSURL(string: urlString)!
if #available(iOS 9.0, *) {
    let safariVC = SFSafariViewController(URL: url)
    safariVC.delegate = self
    self.presentViewController(safariVC, animated: true, completion: {
        self.hideHUD()
     })
} else {
    // Fallback code
}

here 是 link 与其他人面临的完全相同的问题

Answer 1

遇到这个问题是因为看到了一些我在尝试使用 SafariViewController 时遇到的类似问题。将我的问题追踪到出现弹出窗口时使用 SafariViewController。整理了一些代码来展示我的问题和可能的解决方案。

ViewController.swift:

 /*
 This view controller tries to boil down to the essence of a problem seen 
 when trying to use SafariViewController.  The net result is DO NOT present 
 the SafariViewController when a popup is present.

 This controller and the associated popup show 3 ways to 
 present the SafariViewController:

 Always Good:  This uses a button on the controller to simply call the
 showSVC() routine and never had a problem.

 Good:  This is a work-around for the "Bad" case to follow.  In this case,
 we are using a button in a popup to bring up the SafariViewController.  
 The trick is to get rid of the popup before calling showSVC().  This is 
 done by dismissing the popup immediately without animation and then 
 adding a delay before calling showSVC(). Seems to work fine, but using 
 delays to accomplish things always seems a bit suspect.  Use at your own risk.

 Bad:   When this goes bad, a blank white screen is presented with no way
 to escape.  Using "Reset Content and Settings..." in the simulator can 
 get one back to where it will work one time.  It seemed originally that
 this worked on iOS9 but not on iOS10.  But now seems to fail similarly 
 on both iOS9 and iOS10.  This case is dismissing the popup with animation 
 while trying to bring up the SafariViewController.

 Other info:  This view controller is embedded in a navigation controller - 
 basically to provide a navigation bar and button to act as the anchor 
 point for the popup.  The popup provides two buttons that call back 
 to this controller with the "PopButtonPressedProtocol".  This controller
 uses the title in the popup's buttons to differentiate the "good" and 
 "bad" cases.

 The problems shown by this example sounded similar to problems various 
 others reported, but these reports may be for other reasons, which may 
 or may not be similar.
 */

import UIKit
import SafariServices

class ViewController: UIViewController, UIPopoverPresentationControllerDelegate, PopButtonPressedProtocol {

@IBOutlet weak var btnAlwaysGood: UIButton!
@IBOutlet weak var btnPopup: UIBarButtonItem!

let webAddr = "http://www.google.com"

func delay(_ delay: Double, closure:@escaping ()->()) {
    DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double(Int64(delay * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC), execute: closure)
}

func showSVC() {
    let svc = SFSafariViewController(url: URL(string: webAddr)!)
    self.present(svc, animated: true, completion: nil)
}

func popButtonPressed(_ button: UIButton) {
    if let title = button.currentTitle {
        switch title {
        case "Bad":
            dismiss(animated: true, completion: nil)
            showSVC()
        case "Good":
            dismiss(animated: false, completion: nil)
            delay(0.5, closure: { self.showSVC() })
        default:
            break
        }
    }
}

func popupButtonPressed() {
    performSegue(withIdentifier: "popup", sender: nil)
}

func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle { // Needed for popup
    return .none
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    btnAlwaysGood.addTarget(self,      action: #selector(showSVC),        for: .touchUpInside)
    btnPopup.target = self
    btnPopup.action = #selector(popupButtonPressed)
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let vc = segue.destination as? PopVC {
        vc.delegate = self
        vc.modalPresentationStyle = .popover
        vc.preferredContentSize = CGSize(width: 60, height: 100)
        if let popover = vc.popoverPresentationController {
            popover.permittedArrowDirections = .any
            popover.delegate = self
            popover.barButtonItem = navigationItem.rightBarButtonItem
        }
    }
}
}

PopVC.swift:

import UIKit

protocol PopButtonPressedProtocol : class {
func popButtonPressed(_ button: UIButton)  // protocol:
}

class PopVC: UIViewController {

@IBOutlet weak var btnBad: UIButton!
@IBOutlet weak var btnGood: UIButton!

weak var delegate : PopButtonPressedProtocol?

func buttonPressed(_ button: UIButton) {
    delegate?.popButtonPressed(button)
}

override func viewDidLoad() {
    super.viewDidLoad()
    btnBad.addTarget(self,  action: #selector(buttonPressed(_:)), for: .touchUpInside)
    btnGood.addTarget(self, action: #selector(buttonPressed(_:)), for: .touchUpInside)
}
}

Answer 2

尝试注释掉您正在执行的任何加载动画，并尝试不使用它。

...
    // self.showHUD()
    //  self.hideHUD()
...

这是因为 iOS 10 中的一个错误，在安全修复期间引入，当使用进度条和加载器时，safariViewController 不会加载 window 主 window ]

我真希望 Apple 记录了这一变化。我必须在我当前的应用程序中注释掉加载指示器才能使其正常工作。

Answer 3

Swift5.2，Xcode11.4

我有类似的问题，我正在做的是我正在展示 UIAlertViewController 并且在它的按钮上我出现了 SFSafariController....这段代码在 iOS 13 上完美运行但是 iOS 12 给出了问题....显然我不得不在展示 SFSafariController 之前首先关闭 UIAlertViewController。希望这可以帮助。否则快速修复将使用 UIApplication.shared.openURL()

SFSafariViewController 加载空白白页

SFSafariViewController loading blank white page

ios

swift

ios10

sfsafariviewcontroller