 
 class ISTimeline: UIScrollView {
     
+    private static let gap:CGFloat = 15.0
+    
     var pointDiameter:CGFloat = 6.0 {
         didSet {
             if (pointDiameter < 0.0) {

    }
    
    private func buildSections() {
        let gap:CGFloat = 15.0
        var y:CGFloat = self.bounds.origin.y + self.contentInset.top
        for i in 0 ..< points.count {
            let titleLabel = buildTitleLabel(i)

        titleLabel.font = UIFont.boldSystemFontOfSize(12.0)
        titleLabel.lineBreakMode = .ByWordWrapping
        titleLabel.numberOfLines = 0
        titleLabel.preferredMaxLayoutWidth = calcWidth()
        return titleLabel
    }
    
