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我有一个UIWebView，如果它可以成为一个NSURLConnection. 我做了一个这样的类别

@interface UIWebView (NSURLConnectionDelegate) <NSURLConnectionDelegate> 

//these methods are used by the NSURLConnection, and are implemented in the .m
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge;
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response;
- (BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection;

@end

实现中的方法确实有效，因为我之前有另一个视图是委托，但现在由于某些原因我需要更改它。

我像这样给NSURLConnection一个代表

#import "UIWebView+NSURLConnectionDelegate.h"

[[NSURLConnection alloc] initWithRequest:request delegate:webview]; //used to be self but now i need the webview to know about its own connection because there are multiple webviews

但是当它是这样的类别时，没有一个委托方法被调用。

以前有没有人做过这样的事情，或者这不起作用，因为 NSURLConnection 认为这webview实际上不是委托或其他什么？

编辑以显示更多代码：

- (BOOL)webView:(UIWebView *)webview shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{

NSLog(@"shouldStartLoadWithRequest %@ %d", request.URL.absoluteURL.description, navigationType);
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];

if (!authed) {
    authed = NO; //gets set to yes when delegate methods work (also are some print outs in the delegate methods which are not printing at all)

    urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:webview];
    return NO;
}

return YES;
}
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