我使用 NSURLProtocol 为所有从 UIWebview 发出的请求添加自定义标头。在此 WebView 上执行某些操作时，会触发 AJAX 调用以显示消息。显示消息的此操作使用 AJAX，并且在我使用 NSURLProtocol 方法时总是超时。没有 NSURLProtocol 也可以正常工作。
如果需要更多信息，请告诉我。这是我的代码。
+ (BOOL)canInitWithRequest:(NSURLRequest *)request
{
if ([NSURLProtocol propertyForKey:kUserAgentKey inRequest:request] != nil)
return NO;
return YES;
}
+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request
{
return request;
}
- (void)startLoading
{
NSMutableURLRequest *newRequest = [self.request mutableCopy];
NSString * customAgent = @"CustomeHeaderValue";
[newRequest setValue:customAgent forHTTPHeaderField:kUserAgentKey];
[NSURLProtocol setProperty:@YES forKey:kUserAgentKey inRequest:newRequest];
self.connection = [NSURLConnection connectionWithRequest:newRequest delegate:self];
}
- (void)stopLoading
{
[self.connection cancel];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.client URLProtocol:self didLoadData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[self.client URLProtocol:self didFailWithError:error];
self.connection = nil;
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{`enter code here`
[self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageAllowed];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[self.client URLProtocolDidFinishLoading:self];
self.connection = nil;
}
- (NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)response {
if (response) {
[[self client] URLProtocol:self wasRedirectedToRequest:request redirectResponse:response];
}
return request;
}