Such a difficult chart, can be realized?

[shenyufei]

I believe we are smart people,can understand what I am talking about the effect.

[liuxuan30]

yes you can. however this requires you to understand the code and modify it. ChartsDemo can show a similar one already, just some texts has different offset, and a small line on the axis, and the unit.

Just try read the code about the axis renderer, and the bar chart renderer's drawValues()

As you see, people are asking for hundreds of customizations, and with just a few of us, we can't satisfy them all. You are more than welcome to contribute when you think an enhancement or feature is cool that may help others and file a PR for it.

[dxclancy]

The only thing in your chart that the existing code does not do, I think, is draw the bar chart chunk values (your percentages) in the middle of the color and then the last one at the top.

To achieve this I changed the code in BarChartRenderer as in the following (this also makes it so that the value color is used for the value text and not the bar text, so that you can change your percentages to colors that contrast better with the chart colors):

+                            var previousY = CGFloat(0);
                             for k in 0 ..< transformed.count
                             {
                                 let x = valuePoint.x
                                 let y = transformed[k].y + (vals[k] >= 0 ? posOffset : negOffset)

                                 if (!viewPortHandler.isInBoundsRight(x))
                                 {
                                     break
                                 }

                                 if (!viewPortHandler.isInBoundsY(y) || !viewPortHandler.isInBoundsLeft(x))
                                 {
                                     continue
                                 }
+                                var heightRect = CGRect(x:0,y:0,width: 0, height: vals[k])
+                                trans.rectValueToPixel(&heightRect)
+                                let height = heightRect.height

+                                var textHeightAdjustment = valueTextHeight
+                                var drawY = y + (height / 2.0) - textHeightAdjustment
+                                if (k == (transformed.count - 1 ))
+                                {
+                                    textHeightAdjustment = valueTextHeight * 2
+                                    drawY = y - textHeightAdjustment;
+                                }
+//                                drawY = y
                                 drawValue(context: context,
                                     value: formatter.stringFromNumber(vals[k])!,
                                     xPos: x,
-                                    yPos: y,
+                                    yPos: drawY,
                                     font: valueFont,
                                     align: .Center,
-                                    color: dataSet.valueTextColorAt(j))
+                                    color: dataSet.valueTextColorAt(k))
+                                previousY = y;
                             }