objective-c - 如何在特殊类中建立HTTP连接？

我想创建一个类来处理其他类的所有http连接工作（以避免重复编写代码）。
我将其称为connectioncenter（nsobject的子类），并向其添加以下代码：

-(void)connect:(NSString *)strURL obj:(ConnectCenter *)objConnect
{
    NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:strURL]
                                              cachePolicy:NSURLRequestUseProtocolCachePolicy
                                          timeoutInterval:60.0];

    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:objConnect];
    if (theConnection)
    {
        // receivedData is declared as a method instance elsewhere
        receivedData = [[NSMutableData data] retain];
    }
    else
    {
        // inform the user that the download could not be made
    }

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    // append the new data to the receivedData
    // receivedData is declared as a method instance elsewhere
    [receivedData appendData:data];
}

其他类通过传递url和connectioncenter对象来调用它。但未调用connectionCenter中的“didReceiveData”方法。有什么问题吗？

最佳答案

在设置连接之后，您需要调用[theConnection setDelegate:self]，因为connection:didReceiveData:是一个委托方法。
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