adding views to corresponding arrays

@@ -80,6 +80,7 @@
             PNChartLabel * label = [[PNChartLabel alloc] initWithFrame:CGRectMake((index *  _xLabelWidth + chartMargin), self.frame.size.height - 30.0, _xLabelWidth, 20.0)];
             [label setTextAlignment:NSTextAlignmentCenter];
             label.text = labelText;
+            [_labels addObject:label];
             [self addSubview:label];
         }
     }
@@ -110,6 +111,7 @@
 		bar.backgroundColor = _barBackgroundColor;
 		bar.barColor = [self barColorAtIndex:index];
 		bar.grade = grade;
+        [_bars addObject:bar];
 		[self addSubview:bar];
 
         index += 1;