Chart customAxisMax and customAxisMin doesn't update correctly

[DarkInsight]

In my UI, I have a segmented control and a chart. I also have 31 days of data. Based on the selected segment of segmented control, I will respectively show 1 day, 7 days and 1 month of data. The segmented control also starts at "1 day" segment.

When user taps on a new segment, I will filter the original datas:
self.filteredChartDatas = [self.chartDatas filteredArrayUsingPredicate:predicate];

And then I will construct the data sets for the chart again and then determine the customAxisMax and customAxisMin values for the chart
id <IChartDataSet> set = self.vwChart.data.dataSets[0];
CGFloat maximumValue = set.yMax;
CGFloat minimumValue = set.yMin;

ChartYAxis *leftAxis = self.vwChart.leftAxis;
leftAxis.customAxisMax = maximumValue;
leftAxis.customAxisMin = minimumValue;

And then I will redraw the chart
[self.vwChart animateWithXAxisDuration:2.5 easingOption:ChartEasingOptionEaseInOutQuart];

Let's say for 1 day, the maximum value and minimum value are 1254.45 and 1252.25
for 7 days, the maximum value and minimum value are 1269.95 and 1227.40
for 1 month, the maximum value and minimum value are 1280.80 and 1203.45

The issue is: the chart starts out displaying correctly:

However when I taps on 7 days, the new chart still used the previous maximum and minimum value for 1 day:

And when I taps on 1 month, the chart used the previous maximum and minimum value for 7 days:

It seems whenever I recalculate the maximum and minimum values and redraw the chart, the chart doesn't update properly and still use the previous maximum and minimum values.

I also don't want to set a universal maximum and minimum values, as it might make 1 day chart meaningless:

May I know how should I change my implementation?

[danielgindi]

notifyDataSetChanged()

[DarkInsight]

Thank you very much, the issue is fixed!

[danielgindi]

Note that setting data property - calls notifyDataSetChanged(), so if you set other properties before that, it will avoid extra calculations.