#import <WebKit/WebKit.h>


-(WKWebViewConfiguration *)getWebviewConfig{
    //創(chuàng)建網(wǎng)頁(yè)配置對(duì)象
    WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
    
    // 創(chuàng)建設(shè)置對(duì)象
    WKPreferences *preference = [[WKPreferences alloc]init];
    //最小字體大小 當(dāng)將javaScriptEnabled屬性設(shè)置為NO時(shí)署拟，可以看到明顯的效果
    preference.minimumFontSize = 0;
    //設(shè)置是否支持javaScript 默認(rèn)是支持的
    preference.javaScriptEnabled = YES;
    // 在iOS上默認(rèn)為NO橄仆，表示是否允許不經(jīng)過用戶交互由javaScript自動(dòng)打開窗口
    preference.javaScriptCanOpenWindowsAutomatically = YES;
    config.preferences = preference;
    
    // 是使用h5的視頻播放器在線播放, 還是使用原生播放器全屏播放
    config.allowsInlineMediaPlayback = YES;
    //設(shè)置視頻是否需要用戶手動(dòng)播放  設(shè)置為NO則會(huì)允許自動(dòng)播放
    config.mediaTypesRequiringUserActionForPlayback = YES;
    //設(shè)置是否允許畫中畫技術(shù) 在特定設(shè)備上有效
    config.allowsPictureInPictureMediaPlayback = YES;
    //設(shè)置請(qǐng)求的User-Agent信息中應(yīng)用程序名稱 iOS9后可用
    config.applicationNameForUserAgent = @"ChinaDailyForiPad";
    //自定義的WKScriptMessageHandler 是為了解決內(nèi)存不釋放的問題
//    WeakWebViewScriptMessageDelegate *weakScriptMessageDelegate = [[WeakWebViewScriptMessageDelegate alloc] initWithDelegate:self];
//    //這個(gè)類主要用來(lái)做native與JavaScript的交互管理
//    WKUserContentController * wkUController = [[WKUserContentController alloc] init];
//    //注冊(cè)一個(gè)name為jsToOcNoPrams的js方法
//    [wkUController addScriptMessageHandler:weakScriptMessageDelegate  name:@"share"];
//    config.userContentController = wkUController;
    
    //用完記得移除
    //移除注冊(cè)的js方法
    //[[_webView configuration].userContentController removeScriptMessageHandlerForName:@"jsToOcNoPrams"];
    
    return config;
}

-(void)initWebview{
    //初始化
    self.webview = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight) configuration:[self getWebviewConfig]];
    // 是否允許手勢(shì)左滑返回上一級(jí), 類似導(dǎo)航控制的左滑返回
    self.webview.allowsBackForwardNavigationGestures = YES;
    self.webview.UIDelegate = self;
    self.webview.navigationDelegate = self;
    [self.view addSubview:self.webview];
    
}



#pragma mark - WKNavigationDelegate
// 頁(yè)面開始加載時(shí)調(diào)用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{

 }

  // 當(dāng)內(nèi)容開始返回時(shí)調(diào)用
  - (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation{

 }

 // 頁(yè)面加載完成之后調(diào)用   加載完成對(duì)js進(jìn)行處理
 - (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
     NSMutableString *str = [NSMutableString string];
     //去掉webview中標(biāo)題
    [str appendString:@"var header = document.getElementsByTagName(\'header\')[0];"];
    [str appendString:@"header.parentNode.removeChild(header);"];
    
     //移除網(wǎng)頁(yè)中的評(píng)論
     [str appendString:@"document.getElementsByClassName('comment')[0].remove();"];
     
     [webView evaluateJavaScript:str completionHandler:^(id _Nullable result, NSError * _Nullable error) {
             NSLog(@"didFinishNavigation %@",result);
     }];
 }

 // 頁(yè)面加載失敗時(shí)調(diào)用
 - (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation{

 }

 // 接收到服務(wù)器跳轉(zhuǎn)請(qǐng)求之后調(diào)用
 - (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation{

 }

 // 在收到響應(yīng)后，決定是否跳轉(zhuǎn)
 - (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
   NSLog(@"%@",navigationResponse.response.URL.absoluteString);
     //允許跳轉(zhuǎn)
     
     decisionHandler(WKNavigationResponsePolicyAllow);
    //不允許跳轉(zhuǎn)
     //decisionHandler(WKNavigationResponsePolicyCancel);
 }

 // 在發(fā)送請(qǐng)求之前弱判，決定是否跳轉(zhuǎn)
 - (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
     NSLog(@"%@",navigationAction.request.URL.absoluteString);
     //允許跳轉(zhuǎn)
     decisionHandler(WKNavigationActionPolicyAllow);
     //不允許跳轉(zhuǎn)
     //decisionHandler(WKNavigationActionPolicyCancel);
 }

系統(tǒng)分享

-(void)shareEvent{
    NSString *titleUrl = [self.dict objectForKey:@"title"];
    NSString *url = [self.dict objectForKey:@"url"];
    
    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:@[titleUrl,url] applicationActivities:nil];
        activityVC.definesPresentationContext = YES;
        //不出現(xiàn)在活動(dòng)項(xiàng)目
        //activityVC.excludedActivityTypes = @[UIActivityTypePrint, UIActivityTypeCopyToPasteboard,UIActivityTypeAssignToContact,UIActivityTypeSaveToCameraRoll];
        [self presentViewController:activityVC animated:YES completion:nil];
        //分享之后的回調(diào)
        __weak typeof(activityVC) weekActivity = activityVC;
        activityVC.completionWithItemsHandler = ^(UIActivityType  _Nullable activityType, BOOL completed, NSArray * _Nullable returnedItems, NSError * _Nullable activityError) {
            
            [weekActivity dismissViewControllerAnimated:YES completion:nil];
            if (completed) {
                NSLog(@"completed");
                //分享 成功
            } else {
                NSLog(@"失敗");
                //分享 取消
            }
        };
}