Make delegate methods optional

They should be optional methods so we can get rid of warning when only using one kind of these chart.

Make delegate methods optional
They should be optional methods so we can get rid of warning when only using one kind of these chart.
Wei Wang
Commit 08205ca3b22353a6e079b97a68488c99949cf0f8 08205ca3 1 parent 815f5f98
Showing 1 changed file with 1 additions and 1 deletions
PNChart/PNChartDelegate.h
--- a/PNChart/PNChartDelegate.h
View file @08205ca
+++ b/PNChart/PNChartDelegate.h
View file @08205ca
@@ -9,7 +9,7 @@
 #import <Foundation/Foundation.h>
 @protocol PNChartDelegate <NSObject>
-
+@optional
 /**
  * Callback method that gets invoked when the user taps on the chart line.
  */