Control Device Brightness with UISlider. (NEED HELP!)

veterinarian2008 · 01-25-2012, 10:18 AM

Hello guys!

I really need help on getting a UISlider working to set up my device brightness within the app. I know this is now allowed on iOS 5. My main problem is the UISlider thing. I am know to this. Okay so I tried this:

Code:

-(IBAction)brightnessControlActions{
    
    
   
    float fBrightness = [UIScreen mainScreen].brightness;
    [[UIScreen mainScreen]setBrightness:fBrightness];

    
}

I added a value change method on the IB.

and nothing happened.

Then I try this to see if it worked, but is not working correctly.

Code:

if (slider.value > 1.0) {
        
        [[UIScreen mainScreen]setBrightness:1.0];
        
    }
    
    else if(slider.value > 0.99) {
        
        [[UIScreen mainScreen]setBrightness:0.99];
        
    }
    
    if (slider.value > 0.98) {
        
        [[UIScreen mainScreen]setBrightness:0.98];
        
    }
    
    else if(slider.value > 0.97) {
        
        [[UIScreen mainScreen]setBrightness:0.97];
        
    }
    
    if (slider.value > 0.96) {
        
        [[UIScreen mainScreen]setBrightness:0.96];
        
    }
    
    else if(slider.value > 0.95) {
        
        [[UIScreen mainScreen]setBrightness:0.95];
        
    }

My problem is how do I add this to a UISlider so that it will control it and this is the only code I have to get and set the brightness:

Code:

float fBrightness = [UIScreen mainScreen].brightness;
    [[UIScreen mainScreen]setBrightness:fBrightness];

Please help... I read the docs and I just don't understand much.

Any help will be greatly appreciated :)

**baja_yu** · 01-25-2012, 10:31 AM

Code:

float fBrightness = [UIScreen mainScreen].brightness;
    [[UIScreen mainScreen]setBrightness:fBrightness];

Why would that do anything?! You're reading the screen brightness then setting the same value for the brightness, nothing would change. Set your sliders min and max value to 0.0 and 1.0 then set the sliders value for the brightness.

apatsufas · 01-25-2012, 10:31 AM

Your IBAction should be something like this

Code:

-(IBAction)brightnessControlActions:(id)sender {
    
    UISlider *slider = (UISlider *)sender;
    float fBrightness = slider.value;
    [[UIScreen mainScreen]setBrightness:fBrightness];

    
}

Connect it to your UISlider for the ValueChanged event

veterinarian2008 · 01-25-2012, 10:37 AM

Quote:

Originally Posted by apatsufas

Your IBAction should be something like this

Code:

-(IBAction)brightnessControlActions:(id)sender {
    
    UISlider *slider = (UISlider *)sender;
    float fBrightness = slider.value;
    [[UIScreen mainScreen]setBrightness:fBrightness];

    
}

Connect it to your UISlider for the ValueChanged event

DUDE!!! YOU ARE MY HERO!!!!! I LOVE (NO GAY)

Thank you so much. That was so simple. Wish everyone could help like you.

Thanks!