Update readme about line

@@ -111,12 +111,12 @@ lineChart.delegate = self;
 //For DelegateMethod
 
 
--(void)userClickedOnLineKeyPoint:(CGPoint)point andPointIndex:(NSInteger)index{
-    NSLog(@"Click Key on line %f, %f and index is %d",point.x, point.y,index);
+-(void)userClickedOnLineKeyPoint:(CGPoint)point lineIndex:(NSInteger)lineIndex andPointIndex:(NSInteger)pointIndex{
+    NSLog(@"Click Key on line %f, %f line index is %d and point index is %d",point.x, point.y,(int)lineIndex, (int)pointIndex);
 }
 
--(void)userClickedOnLinePoint:(CGPoint)point {
-    NSLog(@"Click on line %f, %f",point.x, point.y);
+-(void)userClickedOnLinePoint:(CGPoint)point lineIndex:(NSInteger)lineIndex{
+    NSLog(@"Click on line %f, %f, line index is %d",point.x, point.y, (int)lineIndex);
 }
 
 ```