iOS UISlider Value Changed / [sender value]??

[Darkroom]

what is the proper syntax to achieve this ultra simple action... grrr... what i have below apparently is incorrect. UISlider's value changed is connected to the action.

- (IBAction)changeAlpha:(id)sender
       {
       [self.mainView setAlpha:[sender value]];
       }

Error: incompatible type for argument 1 of 'setAlpha'

writing either [sender intValue] or [sender floatValue] (depending on how the slider's values appear) causes a crash.

[edit] nevermind. i figured it out. sender of UISlider can't be generic type (interesting!)... has to be

- (IBAction)changeAlpha:(UISlider *)sender

 

[PhoneyDeveloper]

value is kind of an unfortunate name for UISlider to use for its value.

You either need to typecast the sender to UISlider or typecast value to CGFloat.

 

[Darkroom]

[deleted post]