Added a anchorMargin property so we can set this attribute if needed …

…for custom SMCalloutBackgroundView. Default is still 27.

SMCalloutView.h

@@ -92,6 +92,7 @@ extern NSTimeInterval const kSMCalloutViewRepositionDelayForUIScrollView;
 @property (nonatomic, assign) BOOL highlighted; // will be set by the callout when the callout is in a highlighted state
 @property (nonatomic, assign) CALayer *contentMask; // returns an optional layer whose contents should mask the callout view's contents (not honored by SMClassicCalloutView)
 @property (nonatomic, strong) NSNumber *anchorHeight; //The arrow height, useful for custom background view with custom arrow
+@property (nonatomic, assign) CGFloat anchorMargin; // the smallest possible distance from the edge of our control to the "tip" of the anchor, from either left or right
 @end
 
 // Default for iOS 7, this reproduces the "masked" behavior of the iOS 7-style callout view.

SMCalloutView.m

@@ -25,8 +25,6 @@ @interface UIView (SMFrameAdditions)
 #define SUBTITLE_TOP 28 // the top of the subtitle, when present
 #define SUBTITLE_HEIGHT 15 // subtitle height, fixed
 #define BETWEEN_ACCESSORIES_MARGIN 7 // margin between accessories when no title/subtitle is present
-#define CONTENT_VIEW_MARGIN 12 // margin around content view when present, can be overridden with contentViewInset
-#define ANCHOR_MARGIN 27 // the smallest possible distance from the edge of our control to the "tip" of the anchor, from either left or right
 #define DEFAULT_ANCHOR_HEIGHT 13 // effective height of the anchor, will be overriden by anchorHeight propertiy of the SMCalloutBackgroundView if asigned. 
 #define TOP_ANCHOR_MARGIN 13 // all the above measurements assume a bottom anchor! if we're pointing "up" we'll need to add this top margin to everything.
 #define COMFORTABLE_MARGIN 10 // when we try to reposition content to be visible, we'll consider this margin around your target rect
@@ -329,8 +327,8 @@ - (void)presentCalloutFromRect:(CGRect)rect inLayer:(CALayer *)layer ofView:(UIV
         calloutX = constrainedRect.origin.x+constrainedRect.size.width-self.$width;
 
     // what's the farthest to the left and right that we could point to, given our background image constraints?
-    CGFloat minPointX = calloutX + ANCHOR_MARGIN;
-    CGFloat maxPointX = calloutX + self.$width - ANCHOR_MARGIN;
+    CGFloat minPointX = calloutX + self.backgroundView.anchorMargin;
+    CGFloat maxPointX = calloutX + self.$width - self.backgroundView.anchorMargin;
 
     // we may need to scoot over to the left or right to point at the correct spot
     CGFloat adjustX = 0;
@@ -588,6 +586,8 @@ - (id)initWithFrame:(CGRect)frame {
             grayArrowImage = [self image:blackArrowImage withColor:[UIColor colorWithWhite:0.85 alpha:1]];
         }
 
+        self.anchorMargin = 27;
+
         self.arrowView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, blackArrowImage.size.width, blackArrowImage.size.height)];
         self.arrowView.alpha = 0.96;
         self.arrowImageView = [[UIImageView alloc] initWithImage:whiteArrowImage];