Set gradient color in Objective-C

gistfile1.m

    theView.backgroundColor = [UIColor clearColor];
    
    CAGradientLayer *layer = (CAGradientLayer *)theView.layer;
    CGColorRef liteColor = [UIColor colorWithWhite:0.92f alpha:0.8f].CGColor;
    CGColorRef darkColor = [UIColor colorWithWhite:0.32f alpha:0.8f].CGColor;
    layer.colors = [NSArray arrayWithObjects:(id)liteColor, (id)darkColor, nil];