不调用NSURLConnection委托方法

Question

我正在尝试创建一个简单的NSURLConnection,以使用GET请求与服务器通信.连接工作正常,但从不调用NSURLConnection的委托方法.

这是在做什么:

NSString *post = [NSString stringWithFormat:@"key1=%@&key2=%@&key3=%f&key4=%@", val1, val4, val3, val4];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease] ;

[request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://www.domain.com/demo/name/file.php?%@", post]]];

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection start];

已实现以下委托方法,但没有一个被调用..

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    NSLog(@"did fail");
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
    NSLog(@"did receive data");
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    NSLog(@"did receive response ");
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
    NSLog(@"did finish loading");
    [connection release];
}

我错过了什么吗？

Answer 1

尝试在主线程上运行操作:

NSURLConnection * connection = [[NSURLConnection alloc] 
                                initWithRequest:request
                                       delegate:self startImmediately:NO];

[connection scheduleInRunLoop:[NSRunLoop mainRunLoop] 
                      forMode:NSDefaultRunLoopMode];
[connection start];

Answer 2

你是在后台线程上调用它吗？如果您在后台线程上执行此操作,则可以在调用委托之前退出该线程.