Added popoverContentSize property to match UIPopoverController behavior

Author: Stephan Heilner

WYPopoverController/WYPopoverController.h

@@ -88,6 +88,7 @@ typedef NS_OPTIONS(NSUInteger, WYPopoverArrowDirection) {
 @property (nonatomic, assign) UIEdgeInsets popoverLayoutMargins;
 @property (nonatomic, assign, readonly) BOOL isPopoverVisible;
 @property (nonatomic, strong, readonly) UIViewController* contentViewController;
+@property (nonatomic, assign) CGSize popoverContentSize;
 
 - (id)initWithContentViewController:(UIViewController *)viewController;
 

WYPopoverController/WYPopoverController.m

@@ -1338,6 +1338,40 @@ - (UIColor *)overlayColor
     return result;
 }
 
+- (CGSize)popoverContentSize
+{
+    if ([viewController respondsToSelector:@selector(preferredContentSize)])
+    {
+        return [viewController preferredContentSize];
+    }
+    else if ([viewController respondsToSelector:@selector(contentSizeForViewInPopover:)])
+    {
+#pragma clang diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated"
+        return [viewController contentSizeForViewInPopover];
+#pragma clang diagnostic pop
+    }
+
+    return CGSizeZero;
+}
+
+- (void)setPopoverContentSize:(CGSize)size
+{
+    if ([viewController respondsToSelector:@selector(setPreferredContentSize:)])
+    {
+        [viewController setPreferredContentSize:size];
+    }
+    else if ([viewController respondsToSelector:@selector(setContentSizeForViewInPopover:)])
+    {
+#pragma clang diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated"
+        [viewController setContentSizeForViewInPopover:size];
+#pragma clang diagnostic pop
+    }
+    
+    [self positionPopover];
+}
+
 - (CGSize)contentSizeForViewInPopover
 {
     CGSize result = CGSizeZero;