SFSafariViewController加载空白页面

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上完美运行但是在将我的设备更新到iOS 10后,它只是在地址栏中加载了一个没有URL的空白页面.甚至safariViewController(控制器:SFSafariViewController,didCompleteInitialLoad didLoadSuccessfully:Bool)在控制器出现后也没有被调用.

我在视图控制器中导入了这个:

import SafariServices

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
}

这是其他人面临的完全相同问题的链接

Answer 1

尝试评论你正在做的任何加载动画,并尝试没有它.

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

这是因为在安全修复过程中引入了iOS 10中的一个错误,当使用进度条和加载器作为window主要部分添加时,不会让safariViewController加载window

我真的希望Apple记录下这一变化.我不得不在我当前的应用程序中注释掉加载指示器以使其正常工作.

Answer 2

遇到这个问题是因为我在尝试使用 SafariViewController 时遇到了一些类似的问题。跟踪我的问题是在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)
}
}