WKWebView的屬性cookie同步撰洗、alert不彈出等問(wèn)題

零段直、WKWebView屬性
1泡挺、基本屬性
   代理：WKUIDelegate,WKNavigationDelegate（代理方法見(jiàn)后面）
    //進(jìn)行配置控制器
    WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
    //實(shí)例化對(duì)象
    configuration.userContentController = [WKUserContentController new];
    //JS調(diào)用OC方法注冊(cè),在dealloc方法中必須移除桨嫁，否則內(nèi)存泄露
    [configuration.userContentController addScriptMessageHandler:self name:@"appShareIOS"];
   //允許視頻播放（默認(rèn)是YES）
    configuration.allowsAirPlayForMediaPlayback = YES;
    // 允許在線播放（默認(rèn)是YES）
    configuration.allowsInlineMediaPlayback = YES;
    // 允許可以與網(wǎng)頁(yè)交互乙各，選擇視圖
    configuration.selectionGranularity = YES;
  // 是否支持記憶讀取
    configuration.suppressesIncrementalRendering = YES;

 // 創(chuàng)建設(shè)置屬性對(duì)象
    WKPreferences *preference = [[WKPreferences alloc]init];
    // 設(shè)置字體大小(最小的字體大小)
    preference.minimumFontSize = 40;
    // 設(shè)置偏好設(shè)置對(duì)象
    configuration.preferences = preference;

   _webView = [[HtmlWKWebView alloc] initWithFrame:CGRectMake(0, 64, SCREEN_WIDTH, SCREEN_HEIGHT-64) configuration:configuration];
    _webView.UIDelegate = self;
    _webView.navigationDelegate = self;

  //開(kāi)啟手勢(shì)觸摸
    _webView.allowsBackForwardNavigationGestures = YES;
    // 設(shè)置 可以前進(jìn) 和 后退
    //適應(yīng)你設(shè)定的尺寸
    [_webView sizeToFit];

//注意飒货！注意匾荆！注意：上面將當(dāng)前ViewController設(shè)置為MessageHandler之后需要在當(dāng)前ViewController銷毀前將其移除俯在，否則會(huì)造成內(nèi)存泄漏搔确。
-(void)dealloc{
    
      [_webView.configuration.userContentController removeScriptMessageHandlerForName:@"appShareIOS"];
}

2彼棍、禁止頁(yè)面一些操作，在網(wǎng)頁(yè)加載完時(shí)寫入（didFinishNavigation）
//頁(yè)面加載完后獲取高度
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
   （1） 禁用 頁(yè)面元素選擇
    
    [_webView evaluateJavaScript:@"document.documentElement.style.webkitUserSelect='none';" completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
        
    }];
    
    （2） 禁用 長(zhǎng)按彈出ActionSheet
    
    [_webView evaluateJavaScript:@"document.documentElement.style.webkitTouchCallout='none';" completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
        
    }];

  （3） WKWebView禁止放大縮小(捏合手勢(shì))
    NSString *injectionJSString = @"var script = document.createElement('meta');"
    "script.name = 'viewport';"
    "script.content=\"width=device-width, initial-scale=1.0,maximum-scale=1.0, minimum-scale=1.0, user-scalable=no\";"
    "document.getElementsByTagName('head')[0].appendChild(script);";
    [webView evaluateJavaScript:injectionJSString completionHandler:nil];

   （4）清除WK緩存膳算，否則H5界面跟新座硕，這邊不會(huì)更新
    if ([UIDevice currentDevice].systemVersion.floatValue>=9.0) {
        //        - (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation 中就成功了 。
        //    然而我們等到了iOS9Ｌ榉洹；摇！沒(méi)錯(cuò)机隙！WKWebView的緩存清除API出來(lái)了蜘拉！代碼如下：這是刪除所有緩存和cookie的
        NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes];
        //// Date from
        NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
        //// Execute
        [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
        }];
    }else{
        //iOS8清除緩存
        NSString * libraryPath =  NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES).firstObject;
        NSString * cookiesFolderPath = [libraryPath stringByAppendingString:@"/Cookies"];
        [[NSFileManager defaultManager] removeItemAtPath:cookiesFolderPath error:nil];
    }
    

   （5）獲取網(wǎng)頁(yè)高度
    [webView evaluateJavaScript:@"document.body.offsetHeight;" completionHandler:^(id Result, NSError * error) {
        dispatch_async(dispatch_get_main_queue(), ^{
            CGFloat documentHeight = [Result doubleValue]+15.00;
//            NSLog(@"高度%f",documentHeight);
            //            [DWBToast showCenterWithText:[NSString stringWithFormat:@"%f",documentHeight]];
            if (self.htmlString.length>0) {
                //啥也不干
            }else{
                documentHeight = 0.0;
            }
            
            _footView.frame = CGRectMake(0, documentHeight-self.footView.frame.size.height, SCREEN_WIDTH, self.footView.frame.size.height);
            //加載完設(shè)置好坐標(biāo)打開(kāi)
            _footView.hidden = NO;

            
        });
    }];
}



一、WKWebView - alert不彈出（這是WKWebView相對(duì)于UIWebView的一個(gè)坑）

#pragma mark======================WKWebView - alert不彈出（這是WKWebView相對(duì)于UIWebView的一個(gè)坑）===========================================
//WKWebView默認(rèn)不響應(yīng)js的alert()事件,如何可以開(kāi)啟alert權(quán)限呢?
//設(shè)置wkwebview.delegate = self;
//實(shí)現(xiàn)下面三個(gè)方法：
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:([UIAlertAction actionWithTitle:@"確認(rèn)" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler();
    }])];
    [[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertController animated:YES completion:nil];
    
}
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
    //    DLOG(@"msg = %@ frmae = %@",message,frame);
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:([UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(NO);
    }])];
    [alertController addAction:([UIAlertAction actionWithTitle:@"確認(rèn)" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(YES);
    }])];
    [[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertController animated:YES completion:nil];
}
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * _Nullable))completionHandler{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:prompt message:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.text = defaultText;
    }];
    [alertController addAction:([UIAlertAction actionWithTitle:@"完成" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(alertController.textFields[0].text?:@"");
    }])];
    
    
    [[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertController animated:YES completion:nil];
}

二有鹿、WKWebView默認(rèn)禁止了一些跳轉(zhuǎn)
//UIWebView打開(kāi)ituns.apple.com跳轉(zhuǎn)到appStore, 撥打電話, 喚起郵箱等一系列操作UIWebView默認(rèn)支持的.
//WKWebView默認(rèn)禁止了以上行為,除此之外,js端通過(guò)window.open()打開(kāi)新的網(wǎng)頁(yè)的動(dòng)作也被禁掉了.如何支持呢?可以跳轉(zhuǎn)appStore或者撥號(hào)
-(void)webView:(WKWebView* )webView decidePolicyForNavigationAction:(WKNavigationAction* )navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    if(webView != _webView) {
        decisionHandler(WKNavigationActionPolicyAllow);
        return;
    }
    UIApplication *app = [UIApplication sharedApplication];
    if ([url.scheme isEqualToString:@"tel"])
    {
        if ([app canOpenURL:url])
        {
            [app openURL:url];
            decisionHandler(WKNavigationActionPolicyCancel);
            return;
        }
    }
    if ([url.absoluteString containsString:@"ituns.apple.com"])
    {
        if ([app canOpenURL:url])
        {
            [app openURL:url];
            decisionHandler(WKNavigationActionPolicyCancel);
            return;
        }
    }
    decisionHandler(WKNavigationActionPolicyAllow);
}




三旭旭、WKWebView代理方法
#pragma mark - WKNavigationDelegate
// 頁(yè)面開(kāi)始加載時(shí)調(diào)用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
}
// 內(nèi)容開(kāi)始返回時(shí)調(diào)用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
}
// 頁(yè)面加載完成時(shí)調(diào)用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    
}
// 頁(yè)面加載失敗時(shí)調(diào)用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation {
}
//新增的三個(gè)代理方法:

// 這個(gè)方法是服務(wù)器重定向時(shí)調(diào)用，即 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)后葱跋，決定是否跳轉(zhuǎn)
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
}
// 在發(fā)送請(qǐng)求之前持寄，決定是否跳轉(zhuǎn)
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    //需執(zhí)行decisionHandler的block。
}


四娱俺、WKUIDelegate 協(xié)議

#pragma mark - WKUIDelegate
//WKWebView打開(kāi)新界面 需要打開(kāi)新界面是,WKWebView的代理WKUIDelegate方法
- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {
//    會(huì)攔截到window.open()事件.只需要我們?cè)谠诜椒▋?nèi)進(jìn)行處理
    if (!navigationAction.targetFrame.isMainFrame) {
        [webView loadRequest:navigationAction.request];
    }
    return nil;
}


/**
 *  web界面中有彈出警告框時(shí)調(diào)用
 *
 *  @param webView           實(shí)現(xiàn)該代理的webview
 *  @param message           警告框中的內(nèi)容
 *  @param frame             主窗口
 *  @param completionHandler 警告框消失調(diào)用
 */
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(void (^)())completionHandler {
    
}

/// 輸入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler {
    
}
/// 確認(rèn)框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler {
    
}
/// 警告框
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
    
}