How to get event of card scratching completed in iphone

Question

I got few scratch card examples form github . All are working fine, but the thing which is missing in them is the event when I have scratched the gray surface and the gift/prize is visible. If user is scratching and the scratching reached a certain percentage i.e. 70% or 80% I want to fire event and perform further functionality.

I have done research on google, but so far no results. Also I am new to iOS development.

links of project I took

Scratch Card View

Scratch-n-See

Thanks

Answer 1

in Scratch-n-See you have:

- (void)imageMaskView:(ImageMaskView *)maskView cleatPercentWasChanged:(float)clearPercent {
        NSLog(@"percent: %.2f", clearPercent);
}

You can't do anything with that? :)

if (clearPercent > x)
{
//your code
}