Question

I am working on PDF Application in which I want to add brightness settings which help to increase-decrease the brightness of a PDF page.

How can I do so?

Answer 1

insert UIImage with Black.png is a Black color image & change slider value for Brightness 0.2 to 1.0

UIImageView *imgview=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 768, 1024)];
imgview.image=[UIImage imageNamed:@"Black.png"];

[self.view addSubview:imgview];
[imgview bringSubviewToFront:self.view];
imgview.alpha=1.0;