Question

This might be a ridiculous question but I can’t find it asked yet here already.

Have a protocol delegate method defined:

- (void)myAddViewController:(MyAddViewController *)myAddViewController 
             loadGPS:(BOOL)gps loadCamera:(BOOL)camera;

which basically is to determine whether the GPS system is to be loaded or the camera should be loaded.

I call this method via:

[self.delegate myAddViewController:self loadGPS:YES loadCamera:NO];
// or alternatively
[self.delegate myAddViewController:self loadGPS:NO loadCamera:YES];

Inside my implemented method in the delegate we have:

- (void)myAddViewController:(MyAddViewController *)myAddViewController loadGPS:(BOOL)gps loadCamera:(BOOL)camera {
 .... .... ...  
if (gps) {
        ......
    }

    if (camera) {
      // camera is ALWAYS nil and never seems to be set?!
      .....

    }

So why when I call the delegate method with Camera: YES is the camera var always nil? It seems like it is never recognizing my second var yet it doesn’t mind compiling? 🙂

Answer 1

It seems like a waste to pass in two mutually exclusive boolean values to a method.

Perhaps you’d be better with two delegate methods:

[self.delegate myAddGPSViewController:self];
// or alternatively
[self.delegate myAddCameraViewController:self];

because when you’re firing the delegate methods, you’ll already know whether you want GPS or Camera anyway.