Iphone 如何释放NSUrlConnection类对象NSMutableData类对象？

我正在制作一个应用程序。在这个应用程序中，我使用NSUrlconnection类。下面是我的代码

- (void)viewDidLoad {
[super viewDidLoad];
responsedata = [[NSMutableData data] retain];
NSString *url = [NSString stringWithFormat:@"https://www.google.com"];
NSURL *URL = [NSURL URLWithString:url];
NSURLRequest *request=[[NSURLRequest alloc]initWithURL:URL];
[[NSURLConnection alloc] initWithRequest:request delegate:self];

[request release];
}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{

   [responsedata setLength:0];
}
 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responsedata appendData:data];
   }

  - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    }
  - (void)connectionDidFinishLoading:(NSURLConnection *)connection {

     [connection release];
    }

在这段代码中，当iam执行时，它显示了

responsedata=[[NSMutableData]retain]
[[NSURLConnection alloc]initWithRequest:request委托：self]在
viewDidLoad（）中
.那么请告诉我它是在哪里发布的

您应该保存对
NSURLConnection
的引用：

NSURLConnection*connection=[[NSURLConnection alloc]initWithRequest:request委托：self]


您应该启动它：

[连接启动]


您应该在
didFailWithError
或
connectiondifinishload
中释放它


ConnectionDiFinishLoading（）已经有了连接对象。在该方法中，我发布了该对象。