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[ASEnvironment - Layout] Fixes to upward propagation of ASLayoutable properties.

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This commit is contained in:
Hannah Troisi
2016-04-02 15:03:43 -07:00
parent a817abd43f
commit dbad1c38e5
12 changed files with 54 additions and 67 deletions
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17
examples/SocialAppLayout/Sample/PostNode.m
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@@ -34,8 +34,8 @@
@implementation PostNode
- (instancetype)initWithPost:(Post *)post {
- (instancetype)initWithPost:(Post *)post
{
self = [super init];
if (self) {
_post = post;
@@ -181,14 +181,19 @@
[super didLoad];
}
- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize {
- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
{
// Flexible spacer between username and time
ASLayoutSpec *spacer = [[ASLayoutSpec alloc] init];
spacer.flexGrow = YES;
// NOTE: This inset is not actually required by the layout, but is an example of the upward propogation of layoutable
// properties. Specifically, .flexGrow from the child is transferred to the inset spec so they can expand together.
// Without this capability, it would be required to set insetSpacer.flexGrow = YES;
ASInsetLayoutSpec *insetSpacer = [ASInsetLayoutSpec insetLayoutSpecWithInsets:UIEdgeInsetsMake(0, 0, 0, 0) child:spacer];
// Horizontal stack for name, username, via icon and time
NSMutableArray *layoutSpecChildren = [@[_nameNode, _usernameNode, spacer] mutableCopy];
NSMutableArray *layoutSpecChildren = [@[_nameNode, _usernameNode, insetSpacer] mutableCopy];
if (_post.via != 0) {
[layoutSpecChildren addObject:_viaNode];
}