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WKWebView高度自适应以及截获页面点击的URL

WKWebView高度自适应以及截获页面点击的URL

作者: 碧海云天V | 来源:发表于2018-03-28 10:05 被阅读10次

    首先来看下UIWebView的做法:

    //---------------viewDidload里面---------------
    
    UIWebView *webView = [[UIWebViewalloc]initWithFrame:CGRectMake(0,0,WIDTH,0)];
    webView.delegate =self;
    [self.viewaddSubview:webView];
    [webView loadHTMLString:html/*html内容*/ baseURL:nil];
    
    
    //---------------代理方法---------------
    
    -(void)webViewDidFinishLoad:(UIWebView*) webView {
    
        //获取页面高度,并重置webview的frame
        CGFloat documentHeight = [[webViewstringByEvaluatingJavaScriptFromString:@"document.getElementById(\"content\").offsetHeight;"]floatValue];
        CGRect frame = webView.frame;
        frame.size.height = documentHeight;
        webView.frame = frame;
    }
    
    - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
        
        NSString* strRequest = request.URL.absoluteString;
        
        if([strRequestisEqualToString:@"about:blank"]) {//主页面加载内容
            returnYES;//允许跳转
        } else {//截获页面里面的链接点击
            //do something you want
            returnNO;//不允许跳转
        }
    }
    
    

    在来对应看下WKWebView:

    //---------------viewDidload里面---------------
    
    WKWebView   *wkWebview = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, 0)];
    wkWebview.navigationDelegate = self;
    [self.view wkWebview];
    [wkWebview loadHTMLString:html/*html内容*/ baseURL:nil];
    
    
    //---------------代理方法---------------
    
    - (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecifiedWKNavigation *)navigation {
        [webView evaluateJavaScript:@"document.getElementById(\"content\").offsetHeight;"completionHandler:^(id_Nullable result,NSError *_Nullable error) {
    //获取页面高度,并重置webview的frame
            CGFloat documentHeight = [resultdoubleValue];
            CGRect frame = webView.frame;
            frame.size.height = documentHeight;
            webView.frame = frame;
        }];
    }
    
    // 类似 UIWebView的 -webView: shouldStartLoadWithRequest: navigationType:
    - (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
        
        NSString *strRequest = [navigationAction.request.URL.absoluteStringstringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
        if([strRequestisEqualToString:@"about:blank"]) {//主页面加载内容
            decisionHandler(WKNavigationActionPolicyAllow);//允许跳转
        } else {//截获页面里面的链接点击
            //do something you want
    decisionHandler(WKNavigationActionPolicyCancel);//不允许跳转
        }
    }
    

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