Macos 在单击链接时检测WebView（Mac）

我正在尝试检测何时单击Web视图中的链接。 我将代表设置为

[_WebCont delete:self];
_WebCont.policyDelegate = self;

及

我将此用作我的侦听器：

- (void)_WebCont:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation request:(NSURLRequest *)request frame:(WebFrame *)frame decisionListener:(id<WebPolicyDecisionListener>)listener {
    NSString *url = request.URL.absoluteString;
    url = [NSString stringWithFormat:@"*load %@",url];
    [self sendMessage:url];
    NSLog([NSString stringWithFormat:@"Click: %@",url]);

}

-（void）\u WebCont:（WebView*）WebView decisionpolicyfornavigationaction:（NSDictionary*）action信息请求：（NSURLRequest*）请求帧：（WebFrame*）帧决策侦听器：（id）侦听器{
NSString*url=request.url.absoluteString；
url=[NSString stringWithFormat:@“*load%@”，url]；
[自我发送消息：url]；
NSLog（[NSString stringWithFormat:@“单击：%@”，url]）；
}

但当我在视图中单击链接时，它从不记录任何内容。

---

有关修复此问题的任何帮助？

要实现策略侦听器，您需要执行以下操作：

WebPolicyDecisionListener.h：

// ...
@interface WebPolicyDecisionListener: NSObject {
// ...
}


// Implement PolicyDelegate
-(void)webView:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation
                                                          request:(NSURLRequest *)request
                                                            frame:(WebFrame *)frame
                                                 decisionListener:(id<WebPolicyDecisionListener>)listener;

-(void)webView:(WebView *)webView decidePolicyForNewWindowAction:(NSDictionary *)actionInformation
                                                         request:(NSURLRequest *)request
                                                    newFrameName:(NSString *)frameName
                                                decisionListener:(id <WebPolicyDecisionListener>)listener;
// ...
@end

---

所以我应该添加thr方法？谢谢。在我的例子中，我检测到可下载的

Blob

HTML5对象链接（例如

Blob:https://mydomain/BLOB_ID

），我可以做到这一点，但我不知道如何让这个文件被下载，而不是可视化（这就是现在发生的事情）。。。

// ...
@interface WebPolicyDecisionListener: NSObject {
// ...
}


// Implement PolicyDelegate
-(void)webView:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation
                                                          request:(NSURLRequest *)request
                                                            frame:(WebFrame *)frame
                                                 decisionListener:(id<WebPolicyDecisionListener>)listener;

-(void)webView:(WebView *)webView decidePolicyForNewWindowAction:(NSDictionary *)actionInformation
                                                         request:(NSURLRequest *)request
                                                    newFrameName:(NSString *)frameName
                                                decisionListener:(id <WebPolicyDecisionListener>)listener;
// ...
@end

@implementation WebPolicyDecisionListener
// ...
- (void)webView:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation
                                                           request:(NSURLRequest *)request
                                                             frame:(WebFrame *)frame
                                                  decisionListener:(id<WebPolicyDecisionListener>)listener
{
  if (WebNavigationTypeLinkClicked == [[actionInformation objectForKey:WebActionNavigationTypeKey] intValue])
  {
    // link was clicked do something with it...
  }
  [listener use]; // Say for webview to do it work...
}


-(void)webView:(WebView *)webView decidePolicyForNewWindowAction:(NSDictionary *)actionInformation
                                                         request:(NSURLRequest *)request
                                                    newFrameName:(NSString *)frameName
                                                decisionListener:(id <WebPolicyDecisionListener>)listener
{
  if (WebNavigationTypeLinkClicked == [[actionInformation objectForKey:WebActionNavigationTypeKey] intValue])
  {
    // link was clicked and webview want to open it in new window do something with it...
  }
  [listener ignore]; // ignore webview default implementation...
}
// ...
@end

WebPolicyDecisionListener* listener = [[WebPolicyDecisionListener alloc] init];
// ...
[_WebCont setPolicyDelegate:listener];