Override layoutSubviews to achieve material design appearance

Material design view customisation

- (void)layoutSubviews {
    [super layoutSubviews];
    
    CGFloat radius = 2.0f;
    self.layer.cornerRadius = radius;
    self.layer.masksToBounds = NO;
    self.layer.shadowColor = [UIColor blackColor].CGColor;
    self.layer.shadowOffset = CGSizeMake(0, 3);
    self.layer.shadowOpacity = 0.5;
    
    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:self.bounds cornerRadius:radius];
    self.layer.shadowPath = path.CGPath;
}