Gate ASButtonNode setTitle method since [UIFont buttonFontSize] is unavailable on tvOS 9.1

AsyncDisplayKit/ASButtonNode.h

@@ -54,6 +54,7 @@
  */
 - (void)setAttributedTitle:(nullable NSAttributedString *)title forState:(ASControlState)state;
 
+#if TARGET_OS_IOS
 /**
  *  Sets the title to use for the specified state. This will reset styled title previously set with -setAttributedTitle:forState.
  *
@@ -63,7 +64,7 @@
  *  @param state The state that uses the specified title. The possible values are described in ASControlState.
  */
 - (void)setTitle:(nonnull NSString *)title withFont:(nullable UIFont *)font withColor:(nullable UIColor *)color forState:(ASControlState)state;
-
+#endif
 /**
  *  Returns the image used for a button state.
  *

AsyncDisplayKit/ASButtonNode.mm

@@ -196,6 +196,7 @@
   [self setNeedsLayout];
 }
 
+#if TARGET_OS_IOS
 - (void)setTitle:(NSString *)title withFont:(UIFont *)font withColor:(UIColor *)color forState:(ASControlState)state
 {
   NSDictionary *attributes = @{
@@ -207,6 +208,7 @@
                                                                attributes:attributes];
   [self setAttributedTitle:string forState:state];
 }
+#endif
 
 - (NSAttributedString *)attributedTitleForState:(ASControlState)state
 {