Re: Error in NSTask launch
Re: Error in NSTask launch
- Subject: Re: Error in NSTask launch
- From: Roland King <email@hidden>
- Date: Fri, 17 Oct 2008 09:58:59 +0800
development2 wrote:
I know it is something I am doinig but I am getting an error I can't
seem to figure out. Here the code and then the error.
NSString *exePath = [[NSBundle
bundleWithIdentifier:@"com.yourcompany.SetupDevice"]
pathForResource:@"upnpsearch"
ofType:@""];
RunCommand *command = [[RunCommand alloc] initWithPath:exePath];
// set up the args
NSNumber *time = [NSNumber numberWithInt:15];
NSString *destPath = [NSString stringWithString:@"/tmp"];
NSArray *myArray = [NSArray arrayWithObjects: time, destPath, nil];
[command setArgs:myArray];
int result = [command execute];
Now in execute tI have the call:
[task launch];
I get the error:
2008-10-16 19:36:21.530 Installer[39330:813] *** -[NSCFNumber
fileSystemRepresentation]: unrecognized selector sent to instance
0x3fbe9a20
(gdb) continue
2008-10-16 19:36:24.751 Installer[39330:813] *** -[NSCFNumber
fileSystemRepresentation]: unrecognized selector sent to instance
0x3fbe9a20
Now I know this is on the arguments that I am passing in to the
command line, but they look fine to em (Above in code) can anyone
else see anything wrong?
Thanks,
well you're exec'ing a shell command, which needs command-line arguments
as strings. So each of your arguments is being converted to a string
ready to be sent to the shell. That's accomplished by calling
fileSystemRepresentation on each of them. As you can see, NSCFNumber (ie
your NSNumber) doesn't implement that method, which isn't that
surprising, there is no one fileSystemRepresentation of a number, you
might want an integer, or a float with a given number of decimals or the
word TRUE or .. anything.
You need to figure out what your shell command actually wants in string
format, convert your NSNumber explicitly to that, and then pass that as
an NSString
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