initWithContentOfFile..."Expre...

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Hi everyone.
I wrote this code:

Objective-C

- (IBAction)getTrainingSet:(id)sender {
    [self.netOne.trainingSet initWithContentsOfFile:@"/Scrivania" encoding:NSASCIIStringEncoding error:NULL];
}

"trainingSet" is a property declared as NSString.
When I try to compile and run this code, I get the "Expression result unused" error, reported to the "error:" parameter. How do I fix this?
Thanks...

Posted 12-Oct-14 0:49am

militandri

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KarstenK · Answer 1 · 2014-10-12T07:27:00

Solution 1

you must you the keyword "nil". The compiler distinguishes between the integer value "NULL" and the null pointer "nil".

It is a "feature" of Objective-C ;-)

Posted 12-Oct-14 7:27am

KarstenK

Comments

militandri 12-Oct-14 13:34pm

Yes I know, but even if I write nil it still doesn't work.

Waseem Ahmad Khan · Answer 2 · 2014-10-20T00:43:00

Solution 2

Try like this

C#

self.netOne.trainingSet = [[NSString alloc] initWithContentsOfFile:@"/Scrivania" encoding:NSASCIIStringEncoding error:nil];

Posted 20-Oct-14 0:43am

Waseem Ahmad Khan

Updated 25-Nov-14 22:21pm

v2