gistify56836.m

    // Create a mask layer and the frame to determine what will be visible in the view.
    CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
    
    CGRect topMaskRect = CGRectMake(0, 0, 100, 10);
    CGRect bottomMaskRect = CGRectMake(0, 33, 100, 10);

    // Create a path with the top rect in it.
    CGMutablePathRef path = CGPathCreateMutableCopy(CGPathCreateWithRect(topMaskRect, NULL));
    
    // now add the bottom rect to path
    CGPathAddRect(path, NULL, bottomMaskRect);
    
    // Set the path to the mask layer.
    maskLayer.path = path;
    
    // Release the path since it's not covered by ARC.
    CGPathRelease(path);