[ASLayoutSpec] Set flexShrink = YES by default on ASTextNode.

AsyncDisplayKit/ASTextNode.h

@@ -73,6 +73,13 @@ typedef NS_ENUM(NSUInteger, ASTextNodeHighlightStyle) {
  */
 @property (nonatomic, assign) NSUInteger maximumNumberOfLines;
 
+/**
+ * @abstract flexShrink is YES by default for ASTextNode, allowing it to wrap to
+ * multple lines when contained in stacks.
+ * @default YES
+ */
+@property (nonatomic, assign) BOOL flexShrink;
+
 /**
  @abstract The number of lines in the text. Text must have been sized first.
  */

AsyncDisplayKit/ASTextNode.mm

@@ -82,7 +82,7 @@ @implementation ASTextNode {
 
   UILongPressGestureRecognizer *_longPressGestureRecognizer;
 }
-@dynamic placeholderEnabled;
+@dynamic placeholderEnabled, flexShrink;
 
 #pragma mark - NSObject
 
@@ -104,6 +104,9 @@ - (instancetype)init
     self.userInteractionEnabled = NO;
     self.needsDisplayOnBoundsChange = YES;
 
+    // Enable flexShrink by default so that text nodes wrap to multiple lines when in a stack.
+    self.flexShrink = YES;
+
     _truncationMode = NSLineBreakByWordWrapping;
     _composedTruncationString = DefaultTruncationAttributedString();
 

examples/SocialAppLayout/Sample/PostNode.m

@@ -42,20 +42,25 @@ - (instancetype)initWithPost:(Post *)post
 
         // Name node
         _nameNode = [[ASTextNode alloc] init];
+
+        _nameNode.flexShrink = NO;  // Never truncate user's real name
         _nameNode.attributedString = [[NSAttributedString alloc] initWithString:_post.name attributes:[TextStyles nameStyle]];
         _nameNode.maximumNumberOfLines = 1;
         [self addSubnode:_nameNode];
 
         // Username node
         _usernameNode = [[ASTextNode alloc] init];
+
+        _usernameNode.flexShrink = YES; // If real name and username don't fit to cell width, allow username shrink
         _usernameNode.attributedString = [[NSAttributedString alloc] initWithString:_post.username attributes:[TextStyles usernameStyle]];
-        _usernameNode.flexShrink = YES; //if name and username don't fit to cell width, allow username shrink
         _usernameNode.truncationMode = NSLineBreakByTruncatingTail;
         _usernameNode.maximumNumberOfLines = 1;
         [self addSubnode:_usernameNode];
 
         // Time node
         _timeNode = [[ASTextNode alloc] init];
+
+        _timeNode.flexShrink = NO;  // Never truncate the time, as it is quite short.
         _timeNode.attributedString = [[NSAttributedString alloc] initWithString:_post.time attributes:[TextStyles timeStyle]];
         [self addSubnode:_timeNode];