[Examples] Move several simpler, single-purpose examples to extras to ensure Travis does not time out.

examples_extra/ASTraitCollection/Sample/OverrideViewController.m

@@ -0,0 +1,97 @@
+/* This file provided by Facebook is for non-commercial testing and evaluation
+ * purposes only.  Facebook reserves all rights not expressly granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#import "OverrideViewController.h"
+#import <AsyncDisplayKit/ASTraitCollection.h>
+
+static NSString *kLinkAttributeName = @"PlaceKittenNodeLinkAttributeName";
+
+@interface OverrideNode()
+@property (nonatomic, strong) ASTextNode *textNode;
+@property (nonatomic, strong) ASButtonNode *buttonNode;
+@end
+
+@implementation OverrideNode
+
+- (instancetype)init
+{
+  if (!(self = [super init]))
+    return nil;
+  
+  _textNode = [[ASTextNode alloc] init];
+  _textNode.flexGrow = YES;
+  _textNode.flexShrink = YES;
+  _textNode.maximumNumberOfLines = 3;
+  [self addSubnode:_textNode];
+  
+  _buttonNode = [[ASButtonNode alloc] init];
+  [_buttonNode setAttributedTitle:[[NSAttributedString alloc] initWithString:@"Close"] forState:ASControlStateNormal];
+  [self addSubnode:_buttonNode];
+  
+  self.backgroundColor = [UIColor lightGrayColor];
+  
+  return self;
+}
+
+- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
+{
+  CGFloat pointSize = 16.f;
+  ASTraitCollection *traitCollection = [self asyncTraitCollection];
+  if (traitCollection.horizontalSizeClass == UIUserInterfaceSizeClassRegular) {
+    // This should never happen because we override the VC's display traits to always be compact.
+    pointSize = 100;
+  }
+  
+  NSString *blurb = @"kittens courtesy placekitten.com";
+  NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:blurb];
+  [string addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue" size:pointSize] range:NSMakeRange(0, blurb.length)];
+  [string addAttributes:@{
+                          kLinkAttributeName: [NSURL URLWithString:@"http://placekitten.com/"],
+                          NSForegroundColorAttributeName: [UIColor grayColor],
+                          NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle | NSUnderlinePatternDot),
+                          }
+                  range:[blurb rangeOfString:@"placekitten.com"]];
+  
+  _textNode.attributedString = string;
+  
+  ASStackLayoutSpec *stackSpec = [ASStackLayoutSpec verticalStackLayoutSpec];
+  stackSpec.children = @[_textNode, _buttonNode];
+  stackSpec.spacing = 10;
+  return [ASInsetLayoutSpec insetLayoutSpecWithInsets:UIEdgeInsetsMake(40, 20, 20, 20) child:stackSpec];
+}
+
+@end
+
+@interface OverrideViewController ()
+
+@end
+
+@implementation OverrideViewController
+
+- (instancetype)init
+{
+  OverrideNode *overrideNode = [[OverrideNode alloc] init];
+  
+  if (!(self = [super initWithNode:overrideNode]))
+    return nil;
+  
+  [overrideNode.buttonNode addTarget:self action:@selector(closeTapped:) forControlEvents:ASControlNodeEventTouchUpInside];
+  return self;
+}
+
+- (void)closeTapped:(id)sender
+{
+  if (self.closeBlock) {
+    self.closeBlock();
+  }
+}
+
+@end