UIScrollView fading gradient

fading_gradient.m

- (void)maskUIViewHorizontally:(UIView *)view {
	view.layer.mask = nil;
	_maskLayer = nil;
	
	if (!_maskLayer) {
		_maskLayer = [CAGradientLayer layer];
		
		UIColor *outerColor = [UIColor colorWithWhite:1.0 alpha:0.0]; // transparent
		UIColor *innerColor = [UIColor colorWithWhite:1.0 alpha:1.0]; // opaque
		
		_maskLayer.colors = [NSArray arrayWithObjects:(id)[outerColor CGColor], (id)[innerColor CGColor], 
							 (id)[innerColor CGColor], (id)[outerColor CGColor], nil];
		_maskLayer.locations = [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.0],
								[NSNumber numberWithFloat:0.0125],
								[NSNumber numberWithFloat:0.9875],
								[NSNumber numberWithFloat:1.0], nil];
		_maskLayer.startPoint = CGPointMake(0.0, 0.5);
		_maskLayer.endPoint = CGPointMake(1.0, 0.5);
		
		_maskLayer.bounds = view.bounds;
		_maskLayer.anchorPoint = CGPointZero;
		
		view.layer.mask = _maskLayer;
	}
}