             let title = self.datasource?.lineGraph(lineGraph: self, titleForXValue: Double(i), position: labels.count)
             label.text = title ?? "\(i)"
             labels.append(label)
+            label.alpha = 0
             addSubview(label)
+            UIView.animateWithDuration(0.35) {
+                label.alpha = 1
+            }
+
         }
         
         titleLabels = labels

            let title = self.datasource?.lineGraph(lineGraph: self, titleForYValue: step, index: i)
            label.text = title ?? "\(step)"
            labels.append(label)
            addSubview(label)
        }
        self.valueLabels = labels
    }

    private func clearLabels() {
        if let labels = titleLabels {
            for label in labels {
                UIView.animateWithDuration(0.25, animations: { () -> Void in
                    label.alpha = 0
                    }, completion: { (_) -> Void in
                        label.removeFromSuperview()
                })
            }
            titleLabels = nil
        }
        if let labels = valueLabels {
            for label in labels {
                UIView.animateWithDuration(0.25, animations: { () -> Void in
                    label.alpha = 0
                    }, completion: { (_) -> Void in
                        label.removeFromSuperview()
                })
            }
            valueLabels = nil
        }
