NSURLConnection问题？

Question

嗨，我正在使用中的示例代码来处理来自链接multiple url connection的多个NSUrlCOnnection

当我以NSObject的身份使用CustomURLConnection时，我指定了一个方法来启用

CustomURLConnection *connection = [[CustomURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES tag:tag]; 

通过以下方式

 - (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate   startImmediately:(BOOL)startImmediately tag:(NSString *)_tag

 {
connection = [[NSURLConnection alloc] initWithRequest:request delegate:delegate startImmediately:startImmediately];
self.tag = _tag;
return self;
  }

它会给出错误？

Answer 1

我觉得你应该试试：

- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate   startImmediately:(BOOL)startImmediately tag:(NSString *)_tag
 {
    if(self = [super initWithRequest:request delegate:delegate])
    {   
       self.tag = _tag;
    }
    return self;
  }

(如果我没记错，CustomURLConnection扩展了NSURLConnection，而您粘贴的代码是CustomURLConnection的初始化代码。)

Answer 2

问题是没有self。如果CustomURLConnection继承自NSObject，则该方法应如下所示：

- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate   startImmediately:(BOOL)startImmediately tag:(NSString *)_tag {
      if(self = [super init]) {
         self.connection = [[[NSURLConnection alloc] initWithRequest:request delegate:delegate startImmediately:startImmediately] autorelease];
         self.tag = _tag;
      }
      return self;
 }

您还应该确保connection是该类的iVar，并在dealloc中正确发布。对于tag也是如此，请确保添加

 @synthesize tag,connection;

在@implementation之后，声明一个标记iVar和属性。