2

I'm using a variable "volume" 

@property BOOL * volume;

to set Volume On (YES) or Off (NO)

- (IBAction)manageVolume:(UIButton *)sender {
    if (_volume == TRUE) {
        _volume = !_volume; 
//      code...
    } else {
        _volume = !_volume;
//      code...
        }
    }

It Works but it return three alerts:

  • if (_volume == TRUE) { returns Comparison between pointer and integer ('BOOL *' (aka 'signed char *') and 'int')

  • _volume = !_volume; returns Incompatible integer to pointer conversion assigning to 'BOOL *' (aka 'signed char *') from 'int'

How can I solve? Thank you!

Amar
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Matte.Car
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1 Answers1

16

Your property definition is wrong. It should not be a pointer to a BOOL, it should just be a BOOL:

@property BOOL volume;
Wain
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  • Right! Thank you very much! – Matte.Car Oct 20 '13 at 12:06
  • Also worth mentioning is that appropriate BOOL values include `YES` and `NO`, not `true` and `false`. You should see [this thread](http://stackoverflow.com/questions/541289/objective-c-bool-vs-bool) about why that is significant. – Holly Oct 20 '13 at 13:18