On Jul 20, 2008, at 11:43 PM, JB Ashton wrote:
Hi all,
I'm struggling with "receivedData is declared as a method instance
elsewhere" in this explanation of NSURLConnection delegation:
http://developer.apple.com/documentation/Cocoa/Conceptual/URLLoadingSystem/Tasks/UsingNSURLConnection.html
When I declare the receivedData as NSMutableData in the delegate's
header
file, I get this warning from the compiler: "warning: local
declaration of
'receivedData' hides instance variable".
Where should I declare the receivedData variable so that it is
available to
all the delegation methods (connection:didReceiveResponse:, etc.),
but won't
be hidden by the local declaration above? Won't local declarations
in each
delegate method refer to different NSMutableData objects?
Many thanks,
JB
Without seeing the source code, I'm just guessing here - are you
declaring receivedData as method local variable in the same method
where you calling [[NSURLConnection alloc] initWithRequest:delegate: ?
You should declare it in delegate header and just use it in delegate
methods, otherwise local declaration would indeed hide the instance
variable.
@interface ConnectionDelegate : NSObject {
NSURLConnection *connection;
NSMutableData *receivedData;
}
@implementation ConnectionDelegate
- (void)setupConnection {
// ...
connection=[[NSURLConnection alloc] initWithRequest:theRequest
delegate:self];
if (connection) {
receivedData = [NSMutableData new];
// ...
}
}
@end
- Dmitri
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