NSURLConnection的代表問題

Question

NSURLConnection的委託方法不叫。當我使用的是同一類的委託方法在分類頁面

(void) getcategory: (NSString *) catid {
[...]

正確

category *cat = [[category alloc]init]; 
    [cat getcategory:@"1088"]; 

稱爲（didReceiveResponse，connectionDidFinishLoading等）

NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:urlrequest delegate:self]; NSHTTPURLResponse *response; [NSURLConnection sendSynchronousRequest: urlrequest returningResponse: &response error: nil]; if(theConnection) { webData = [[NSMutableData data] retain]; } else { NSLog(@"theConnection is NULL"); } } -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { [webData setLength: 0]; } -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [webData appendData:data]; } -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"ERROR with theConenction"); [connection release]; [webData release]; } -(void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"DONE. Received Bytes: %d", [webData length]); NSString *theXML = [[NSString alloc] initWithBytes: [webData mutableBytes] length: [webData length] encoding:NSUTF8StringEncoding]; } 

Answer 1

您對2個不同的連接使用相同的請求：theConnection（它是異步的，並且設置了委託 - 連接在您初始化時開始）和[NSURLConnection sendSynchronousRequest: urlrequest returningResponse: &response error: nil];。嘗試刪除第二個