From 747a49f87d3b4800458b86ad893986d1b1a8fb8a Mon Sep 17 00:00:00 2001
From: "Thao.Univex" <12045688865@qq.com>
Date: Fri, 30 Dec 2022 21:32:49 +0800
Subject: [PATCH] fix ChartViewBase.data assgin bug

---
 Source/Charts/Charts/ChartViewBase.swift | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Source/Charts/Charts/ChartViewBase.swift b/Source/Charts/Charts/ChartViewBase.swift
index 02742d915e..05d5bd7348 100644
--- a/Source/Charts/Charts/ChartViewBase.swift
+++ b/Source/Charts/Charts/ChartViewBase.swift
@@ -62,9 +62,12 @@ open class ChartViewBase: NSUIView, ChartDataProvider, AnimatorDelegate
             // calculate how many digits are needed
             setupDefaultFormatter(min: data.yMin, max: data.yMax)
 
-            for set in data where set.valueFormatter is DefaultValueFormatter
+            for set in data
             {
-                set.valueFormatter = defaultValueFormatter
+                let valueFormatter: ValueFormatter? = set.valueFormatter
+                if valueFormatter == nil {
+                    set.valueFormatter = defaultValueFormatter
+                }
             }
 
             // let the chart know there is new data