Merge pull request #3286 from danielgindi/3146

for #3146. add a warning message if pie chart has more than one data set
ChartsOrg · Mar 20, 2018 · f7a648c · f7a648c
2 parents 3e36632 + ed8cf20
commit f7a648c
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/Source/Charts/Data/Implementations/Standard/PieChartData.swift b/Source/Charts/Data/Implementations/Standard/PieChartData.swift
@@ -23,6 +23,20 @@ open class PieChartData: ChartData
         super.init(dataSets: dataSets)
     }
 
+    /// - returns: All DataSet objects this ChartData object holds.
+    @objc open override var dataSets: [IChartDataSet]
+    {
+        get
+        {
+            assert(super.dataSets.count <= 1, "Found multiple data sets while pie chart only allows one")
+            return super.dataSets
+        }
+        set
+        {
+            super.dataSets = newValue
+        }
+    }
+
     @objc var dataSet: IPieChartDataSet?
     {
         get