iOS - Comment créer WKWebView Bouton de Retour par programmation?

Essayer d'appeler webView.goBack() méthode sur votre WKWebView instance au lieu WKWebView.goBack(). Aussi après goBack() vous pouvez appeler un webView.reload() méthode pour vous assurer que vous êtes sur la bonne page.

J'ai édité ton code un peu

import UIKit
import WebKit
class ViewController: UIViewController, WKNavigationDelegate {
private var webView: WKWebView!
override func viewDidLoad() {
super.viewDidLoad()
guard let url = NSURL(string: "http://communionchapelefca.org/app-home") else {
return
}
//create WebView and Back button
createWebView()
backButton()
prefButton()
NSNotificationCenter.defaultCenter().addObserver(self,
selector: "receiveNotification:",
name: "BeaconServiceRegionEnter",
object: nil)
NSNotificationCenter.defaultCenter().addObserver(self,
selector: "receiveNotification:",
name: "BeaconServiceRegionUpdate",
object: nil)
NSNotificationCenter.defaultCenter().addObserver(self,
selector: "receiveNotification:",
name: "BeaconServiceRegionExit",
object: nil)
}
private func createWebView() {
let frame  = UIScreen.mainScreen().bounds //or different frame created using CGRectMake(x,y,width,height)
self.webView = WKWebView(frame: frame)
self.webView.navigationDelegate = self
self.view.addSubview(self.webView)
}
func addBackButton(text: String, action: Selector) {
//this function will add Button on your navigation bar e
let rightButton = UIBarButtonItem(title: text, style: .Plain, target: self, action: action)
self.navigationItem.rightBarButtonItem = rightButton
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
//Dispose of any resources that can be recreated.
}
func prefButton() {
let image = UIImage(named: "icon-pref128") as UIImage?
let button = UIButton(type: UIButtonType.Custom) as UIButton
let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
let screenHeight = screenSize.height
button.frame = CGRectMake(screenWidth * 0.85, screenHeight * 0.90, 56, 56) //(X, Y, Height, Width)
button.setImage(image, forState: .Normal)
button.addTarget(self, action: "buttonClicked:", forControlEvents: .TouchUpInside)
self.view.addSubview(button)
}
func backButton() {
let image = UIImage(named: "icon-back") as UIImage?
let button = UIButton(type: UIButtonType.Custom) as UIButton
let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
let screenHeight = screenSize.height
button.frame = CGRectMake(screenWidth * 0.85, screenHeight * 0.90, 56, 56) //(X, Y, Height, Width)
button.setImage(image, forState: .Normal)
button.addTarget(self, action: "customGoBack:", forControlEvents: .TouchUpInside)
self.view.addSubview(button)
}
func customGoBack(sender: UIButton) {
if self.webView.canGoBack {
print("Can go back")
self.webView.goBack()
self.webView.reload()
} else {
print("Can't go back")
}
}
func buttonClicked(sender: UIButton) {
UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)
}
func receiveNotification(notification: NSNotification) {
print(notification.userInfo)
}
func webView(webView: WKWebView, decidePolicyForNavigationAction navigationAction: WKNavigationAction, decisionHandler: (WKNavigationActionPolicy) -> Void) {
if navigationAction.navigationType == .LinkActivated {
if let newURL = navigationAction.request.URL,
host = newURL.host where !host.containsString("communionchapelefca.org") &&
UIApplication.sharedApplication().canOpenURL(newURL) {
if UIApplication.sharedApplication().openURL(newURL) {
print(newURL)
print("Redirected to browser. No need to open it locally")
decisionHandler(.Cancel)
} else {
print("browser can not url. allow it to open locally")
decisionHandler(.Allow)
}
} else {
print("Open it locally")
decisionHandler(.Allow)
}
} else {
print("not a user click")
decisionHandler(.Allow)
}
}
}

Aussi, vous n'avez pas neeed une autre instance de WKWebView parce que vous avez déclaré précédemment :

private var webView : WKWebView!

de sorte qu'il n'est pas nécessaire :

wv.navigationDelegate = self
wv.loadRequest(NSURLRequest(URL: url))  
view.addSubview(wv)

Pour moi, il fonctionne.

Espérons que cela vous aidera 🙂

OriginalL'auteur kamwysoc