145

WKWebView不会打开任何target="_blank"在其 HTML 标签中具有“在新窗口中打开”属性的链接<a href>。

4

15 回答 15

223

我的解决方案是取消导航并再次使用 loadRequest: 加载请求。这将出现类似 UIWebView 的行为，它总是在当前帧中打开新窗口。

实现WKUIDelegate委托并将其设置为_webview.uiDelegate. 然后实现：

- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures
{
  if (!navigationAction.targetFrame.isMainFrame) {
    [webView loadRequest:navigationAction.request];
  }

  return nil;
}
于 2014-09-15T17:46:01.197 回答
84

@Cloud Xu 的答案是正确答案。仅供参考，这里是 Swift：

// this handles target=_blank links by opening them in the same view
func webView(webView: WKWebView!, createWebViewWithConfiguration configuration: WKWebViewConfiguration!, forNavigationAction navigationAction: WKNavigationAction!, windowFeatures: WKWindowFeatures!) -> WKWebView! {
    if navigationAction.targetFrame == nil {
        webView.loadRequest(navigationAction.request)
    }
    return nil
}
于 2014-12-10T00:05:42.550 回答
61

使用最新版本的 Swift 4.2+

import WebKit

使用WKUIDelegate扩展您的课程

为 webview 设置委托

self.webView.uiDelegate = self

实现协议方法

func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
    if navigationAction.targetFrame == nil {
        webView.load(navigationAction.request)
    }
    return nil
}
于 2016-12-13T08:16:51.567 回答
31

将自己添加为WKNavigationDelegate

_webView.navigationDelegate = self;

并在委托回调decisionPolicyForNavigationAction:decisionHandler中实现以下代码：

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
{
    //this is a 'new window action' (aka target="_blank") > open this URL externally. If we´re doing nothing here, WKWebView will also just do nothing. Maybe this will change in a later stage of the iOS 8 Beta
    if (!navigationAction.targetFrame) { 
        NSURL *url = navigationAction.request.URL;
        UIApplication *app = [UIApplication sharedApplication];
        if ([app canOpenURL:url]) {
            [app openURL:url];
        }
    }
    decisionHandler(WKNavigationActionPolicyAllow);
}

PS：这段代码来自我的小项目STKWebKitViewController，它围绕 WKWebView 包装了一个可用的 UI。

于 2014-09-07T17:44:29.253 回答
19

如果您已经设置了 WKWebView.navigationDelegate

WKWebView.navigationDelegate = self;

你只需要实现：

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
{
    BOOL shouldLoad = [self shouldStartLoadWithRequest:navigationAction.request]; // check the url if necessary

    if (shouldLoad && navigationAction.targetFrame == nil) {
        // WKWebView ignores links that open in new window
        [webView loadRequest:navigationAction.request];
    }

    // always pass a policy to the decisionHandler
    decisionHandler(shouldLoad ? WKNavigationActionPolicyAllow : WKNavigationActionPolicyCancel);
}

这样您就不需要实现 WKUIDelegate 方法。

于 2016-03-24T11:38:18.900 回答
16

Cloud xu的回答解决了我的问题。

如果有人需要等效的 Swift(4.x/5.0) 版本，这里是：

func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
    if let frame = navigationAction.targetFrame,
        frame.isMainFrame {
        return nil
    }
    // for _blank target or non-mainFrame target
    webView.load(navigationAction.request)
    return nil
}

当然，你必须先设置webView.uiDelegate。

于 2019-08-23T07:17:53.130 回答
8

这些解决方案都不适合我，我确实通过以下方式解决了这个问题：

1）实现WKUIDelegate

@interface ViewController () <WKNavigationDelegate, WKUIDelegate>

2）设置wkWebview的UIDelegate委托

self.wkWebview.UIDelegate = self;

3）实现createWebViewWithConfiguration方法

- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {

if (!navigationAction.targetFrame.isMainFrame) {
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
    [[UIApplication sharedApplication] openURL:[navigationAction.request URL]];
}
return nil;  }
于 2016-05-04T09:30:52.950 回答
7

我确认 Bill Weinman 的 Swift 代码是正确的。但需要提到的是，如果您像我一样是 iOS 开发新手，您还需要委托 UIDelegate 才能工作。

像这样的东西：

self.webView?.UIDelegate = self

因此，您需要在三个地方进行更改。

于 2015-01-05T22:22:47.427 回答
5

您还可以推送另一个视图控制器，或打开一个新选项卡等：

func webView(webView: WKWebView, createWebViewWithConfiguration configuration: WKWebViewConfiguration, forNavigationAction navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
    var wv: WKWebView?

    if navigationAction.targetFrame == nil {
        if let vc = self.storyboard?.instantiateViewControllerWithIdentifier("ViewController")  as? ViewController {
            vc.url = navigationAction.request.URL
            vc.webConfig = configuration
            wv = vc.view as? WKWebView

            self.navigationController?.pushViewController(vc, animated: true)
        }
    }

    return wv
}
于 2014-10-31T21:48:13.617 回答
4
于 2017-12-15T08:37:34.520 回答
2

在 Mobile Safari 中打开 _blank 页面，如果您使用 Swift：

webView.navigationDelegate = self

并在 WKNavigationDelegate 中实现：

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
    if navigationAction.targetFrame == nil, let url = navigationAction.request.url {
        if UIApplication.shared.canOpenURL(url) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        }
    }
    decisionHandler(WKNavigationActionPolicy.allow)
}
于 2020-12-11T17:00:24.350 回答
2

这对我有用：

-(WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {

if (!navigationAction.targetFrame.isMainFrame) {


    WKWebView *newWebview = [[WKWebView alloc] initWithFrame:self.view.frame configuration:configuration];
    newWebview.UIDelegate = self;
    newWebview.navigationDelegate = self;
    [newWebview loadRequest:navigationAction.request];
    self.view = newWebview;

    return  newWebview;
}

return nil;
}

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {

    decisionHandler(WKNavigationActionPolicyAllow);
}

- (void)webViewDidClose:(WKWebView *)webView {
    self.view = self.webView;
}

正如你所看到的，我们在这里所做的只是webView用新的 url 打开一个新的并控制关闭的可能性，就像你需要一个响应second webview来显示在第一个。

于 2018-04-06T11:34:21.410 回答
1

我遇到了一些仅使用webView.load(navigationAction.request). 所以我使用创建一个新的 webView 来做，它工作得很好。

//MARK:- WKUIDelegate
func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
    NSLog(#function)

    if navigationAction.targetFrame == nil {
        NSLog("=> Create a new webView")

        let webView = WKWebView(frame: self.view.bounds, configuration: configuration)
        webView.uiDelegate = self
        webView.navigationDelegate = self

        self.webView = webView

        return webView
    }
    return nil
}
于 2017-10-02T03:31:04.387 回答
0 
**Use following function to create web view**

func initWebView(configuration: WKWebViewConfiguration) 
{
        let webView = WKWebView(frame: UIScreen.main.bounds, configuration: configuration)
        webView.uiDelegate = self
        webView.navigationDelegate = self
        view.addSubview(webView)
        self.webView = webView
    }

**In View Did Load:**

 if webView == nil { initWebView(configuration: WKWebViewConfiguration()) }
   webView?.load(url: url1)


**WKUIDelegate Method need to be implemented**

extension WebViewController: WKUIDelegate {

    func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
        // push new screen to the navigation controller when need to open url in another "tab"
        print("url:\(String(describing: navigationAction.request.url?.absoluteString))")
        if let url = navigationAction.request.url, navigationAction.targetFrame == nil {
            let viewController = WebViewController()
            viewController.initWebView(configuration: configuration)
            viewController.url1 = url
            DispatchQueue.main.async { [weak self] in
                self?.navigationController?.pushViewController(viewController, animated: true)
            }
            return viewController.webView
        }

        return nil
    }
}

extension WKWebView 

{
    func load(url: URL) { load(URLRequest(url: url)) }
}
于 2019-07-31T11:13:19.637 回答
0

使用此方法在网页视图中下载 pdf

func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView?

于 2021-05-11T11:52:31.220 回答