From 6b2770ac1e2d8b1775accfde6df80455e47dcf38 Mon Sep 17 00:00:00 2001
From: yls <2008.yls@163.com>
Date: Mon, 9 Jun 2014 13:49:07 +0800
Subject: [PATCH] add -pieChart:ShouldSelectSliceAtIndex: method

---
 XYPieChart/XYPieChart.h | 1 +
 XYPieChart/XYPieChart.m | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/XYPieChart/XYPieChart.h b/XYPieChart/XYPieChart.h
index 0300ecb..9ec09c0 100644
--- a/XYPieChart/XYPieChart.h
+++ b/XYPieChart/XYPieChart.h
@@ -44,6 +44,7 @@
 - (void)pieChart:(XYPieChart *)pieChart didSelectSliceAtIndex:(NSUInteger)index;
 - (void)pieChart:(XYPieChart *)pieChart willDeselectSliceAtIndex:(NSUInteger)index;
 - (void)pieChart:(XYPieChart *)pieChart didDeselectSliceAtIndex:(NSUInteger)index;
+- (BOOL)pieChart:(XYPieChart *)pieChart ShouldSelectSliceAtIndex:(NSUInteger)index;
 @end
 
 @interface XYPieChart : UIView
diff --git a/XYPieChart/XYPieChart.m b/XYPieChart/XYPieChart.m
index 1914413..9be6bf1 100644
--- a/XYPieChart/XYPieChart.m
+++ b/XYPieChart/XYPieChart.m
@@ -543,6 +543,11 @@ - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
 
 - (void)notifyDelegateOfSelectionChangeFrom:(NSUInteger)previousSelection to:(NSUInteger)newSelection
 {
+    if ([_delegate respondsToSelector:@selector(pieChart:ShouldSelectSliceAtIndex:)]) {
+        if (![_delegate pieChart:self ShouldSelectSliceAtIndex:newSelection]) {
+            return;
+        };
+    }
     if (previousSelection != newSelection){
         if(previousSelection != -1){
             NSUInteger tempPre = previousSelection;