Re: Help with "Messages without a matching method signature..." issue

[Brad Gibbs]

That was it....  Feeling foolish, but grateful.


Thanks.



On Jul 22, 2008, at 12:41 PM, Charles Steinman wrote:

-sendMSG:toPort: is an instance method, which should be sent to an object. You are sending it to Class2, which is a class rather than an instance of that class.

Cheers,
Chuck


--- On Tue, 7/22/08, Brad Gibbs <[EMAIL PROTECTED]> wrote:

From: Brad Gibbs <[EMAIL PROTECTED]>

Subject: Help with "Messages without a matching method signature..." issue

To: "Cocoa List" <cocoa-dev@lists.apple.com>
Date: Tuesday, July 22, 2008, 12:28 PM
I read the Newbie Question on a method signature thread from
June 4 a
few times, but, either that isn't the problem I'm
having, or I'm not
understanding the solution...

Any help would be greatly appreciated.


On compile, I get the following warnings:

warning: 'Class2' may not respond to
'+sendMSG:toPort:'
warning: (Messages without a matching method signature will
be assumed
to return 'id' and accept '...' as
arguments.



And clicking a button produces the following in the
Console:

2008-07-22 11:03:06.824 OSX Interface[37304:10b] ***
+[Class2
sendMSG:toPort:]: unrecognized selector sent to class
0x4080



Below is the offending code:

Class 1 - This class provides IBActions, each of which
calls the
sendMSG: toPort: method of Class 2.  The arguments for the
methods in
this class are used to construct NSStrings in Class 2.
Class 2 - The arguments sent from a button in Class 1
provide two
strings, which are used to compose a new NSString, which is
sent to
another device on the network.


@interface Class1 : NSObject {
}
- (IBAction)powerOn:(id)sender;


@implementation Class1

- (IBAction)powerOn:(id)sender {
        [Class2 sendMSG:@"P1P1" toPort:@"1"];


@interface Class2 : NSObject {
}

- (NSString *)sendString:(NSString *)stringToSend;
- (void)sendMSG:(NSString *)string toPort:(NSString *)port;

@implementation Class2

- (NSString *)sendString:(NSString *)stringToSend {
        NSData *postData = [stringToSend
dataUsingEncoding:NSASCIIStringEncoding
allowLossyConversion:YES];
        NSString *postLength = [NSString
stringWithFormat:@"%d", [postData
length]];
        
        NSMutableURLRequest *theRequest=[[[NSMutableURLRequest
alloc] init]
autorelease];
        ...
        
        response = [[NSString alloc] initWithData:receivedData
encoding:NSASCIIStringEncoding];
        return response;
}


- (void)sendMSG:(NSString *)string toPort:(NSString *)port
{
        NSString *stringToSend;
        stringToSend = [[NSString alloc]
initWithFormat:@"method=MSGSend&param1=%@&param2=%@&param3=200",
port,
string];
        NSLog(@"String being sent: %@", stringToSend);
        [self sendString:stringToSend];
}
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