我试图检测何时单击 WebView 中的链接。
我设置了代表
[_WebCont delete:self];
_WebCont.policyDelegate = self;
和
WebPolicyDecisionListener
我用它作为我的听众:
- (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]);
}
但是当我点击 View 中的链接时,它永远不会记录任何内容。
有什么帮助解决这个问题吗?
最佳答案
要实现策略监听器,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
WebPolicyDecisionListener.m
@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
在你的代码中的某个地方是这样的:
WebPolicyDecisionListener* listener = [[WebPolicyDecisionListener alloc] init];
// ...
[_WebCont setPolicyDelegate:listener];
关于macos - 检测何时单击链接 WebView (Mac),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13792023/