From bc3ce07132628a8cc5a04677c1aec06c2534caa1 Mon Sep 17 00:00:00 2001
From: Wenchao Ding <f33chobits@gmail.com>
Date: Sun, 24 Apr 2016 16:44:11 +0800
Subject: [PATCH] Add -centerForDate: and -frameForDate:

Better for a popover
---
 Example/StoryboardExampleViewController.m |  9 ++-------
 FSCalendar/FSCalendar.h                   | 16 +++++++++++++++-
 FSCalendar/FSCalendar.m                   | 19 +++++++++++++++++++
 3 files changed, 36 insertions(+), 8 deletions(-)

diff --git a/Example/StoryboardExampleViewController.m b/Example/StoryboardExampleViewController.m
index f0baf43c..4daae735 100644
--- a/Example/StoryboardExampleViewController.m
+++ b/Example/StoryboardExampleViewController.m
@@ -92,12 +92,6 @@ - (NSDate *)maximumDateForCalendar:(FSCalendar *)calendar
     return [calendar dateWithYear:2039 month:5 day:31];
 }
 
-
-- (void)calendar:(FSCalendar *)calendar didDeselectDate:(NSDate *)date
-{
-    NSLog(@"Did deselect date %@",[calendar stringFromDate:date]);
-}
-
 #pragma mark - FSCalendarDelegate
 
 - (BOOL)calendar:(FSCalendar *)calendar shouldSelectDate:(NSDate *)date
@@ -118,7 +112,8 @@ - (BOOL)calendar:(FSCalendar *)calendar shouldSelectDate:(NSDate *)date
 - (void)calendar:(FSCalendar *)calendar didSelectDate:(NSDate *)date
 {
     NSLog(@"did select date %@",[calendar stringFromDate:date format:@"yyyy/MM/dd"]);
-    
+    CGRect frame = [self.calendar frameForDate:date];
+    NSLog(@"%@",NSStringFromCGRect(frame));
 }
 
 - (void)calendarCurrentPageDidChange:(FSCalendar *)calendar
diff --git a/FSCalendar/FSCalendar.h b/FSCalendar/FSCalendar.h
index 1dba8e83..71e2e501 100644
--- a/FSCalendar/FSCalendar.h
+++ b/FSCalendar/FSCalendar.h
@@ -379,13 +379,27 @@ IB_DESIGNABLE
 - (void)deselectDate:(NSDate *)date;
 
 /**
- * Change the current page of the calendar.
+ * Changes the current page of the calendar.
  *
  * @param currentPage Representing weekOfYear in week mode, or month in month mode.
  * @param animated YES if you want to animate the change in position; NO if it should be immediate.
  */
 - (void)setCurrentPage:(NSDate *)currentPage animated:(BOOL)animated;
 
+/**
+ * Returns the frame for a non-placeholder cell relative to the super view of the calendar.
+ *
+ * @param date A date is the calendar.
+ */
+- (CGRect)frameForDate:(NSDate *)date;
+
+/**
+ * Returns the midpoint for a non-placeholder cell relative to the super view of the calendar.
+ *
+ * @param date A date is the calendar.
+ */
+- (CGPoint)centerForDate:(NSDate *)date;
+
 @end
 
 #pragma mark - DateTools
diff --git a/FSCalendar/FSCalendar.m b/FSCalendar/FSCalendar.m
index ea280e41..7505e4c3 100644
--- a/FSCalendar/FSCalendar.m
+++ b/FSCalendar/FSCalendar.m
@@ -810,6 +810,25 @@ - (void)setCurrentPage:(NSDate *)currentPage animated:(BOOL)animated
     }
 }
 
+- (CGRect)frameForDate:(NSDate *)date
+{
+    if (!self.superview) {
+        return CGRectZero;
+    }
+    CGRect frame = [_collectionViewLayout layoutAttributesForItemAtIndexPath:[self indexPathForDate:date]].frame;
+    frame = [self.superview convertRect:frame fromView:_collectionView];
+    return frame;
+}
+
+- (CGPoint)centerForDate:(NSDate *)date
+{
+    CGRect frame = [self frameForDate:date];
+    if (CGRectIsEmpty(frame)) {
+        return CGPointZero;
+    }
+    return CGPointMake(CGRectGetMidX(frame), CGRectGetMidY(frame));
+}
+
 - (void)setHeaderHeight:(CGFloat)headerHeight
 {
     if (_headerHeight != headerHeight) {