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Rewrite layoutSpecThatFits: in ASDKgram (#2402)

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This commit is contained in:
Michael Schneider
2016-10-27 16:28:47 -07:00
committed by Adlai Holler
parent 021f5ebdbb
commit 4e32cf6388
2 changed files with 90 additions and 54 deletions
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10
examples/ASDKgram/Sample/CommentsNode.m
View File

@@ -43,10 +43,12 @@
- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
{
ASStackLayoutSpec *verticalStack = [ASStackLayoutSpec verticalStackLayoutSpec];
verticalStack.spacing = INTER_COMMENT_SPACING;
verticalStack.children = [_commentNodes copy];
return verticalStack;
return [ASStackLayoutSpec
stackLayoutSpecWithDirection:ASStackLayoutDirectionVertical
spacing:INTER_COMMENT_SPACING
justifyContent:ASStackLayoutJustifyContentStart
alignItems:ASStackLayoutAlignItemsStretch
children:[_commentNodes copy]];
}
#pragma mark - Instance Methods

134
examples/ASDKgram/Sample/PhotoCellNode.m
View File

@@ -91,7 +91,8 @@
_photoDescriptionLabel.maximumNumberOfLines = 3;
_photoCommentsView = [[CommentsNode alloc] init];
_photoCommentsView.shouldRasterizeDescendants = YES;
// For now disable shouldRasterizeDescendants as it will throw an assertion: 'Node should always be marked invisible before deallocating. ...'
//_photoCommentsView.shouldRasterizeDescendants = YES;
// instead of adding everything addSubnode:
self.automaticallyManagesSubnodes = YES;
@@ -112,55 +113,89 @@
- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
{
// username / photo location header vertical stack
_photoLocationLabel.style.flexShrink = 1.0;
_userNameLabel.style.flexShrink = 1.0;
ASStackLayoutSpec *headerSubStack = [ASStackLayoutSpec verticalStackLayoutSpec];
headerSubStack.style.flexShrink = 1.0;
headerSubStack.children = _photoLocationLabel.attributedText ? @[_userNameLabel, _photoLocationLabel]
: @[_userNameLabel];
// header stack
// constrain avatar image frame size
_userAvatarImageView.style.preferredSize = CGSizeMake(USER_IMAGE_HEIGHT, USER_IMAGE_HEIGHT);
_photoTimeIntervalSincePostLabel.style.spacingBefore = HORIZONTAL_BUFFER; // to remove double spaces around spacer
ASLayoutSpec *spacer = [[ASLayoutSpec alloc] init]; // FIXME: long locations overflow post time - set max size?
spacer.style.flexGrow = 1.0;
UIEdgeInsets avatarInsets = UIEdgeInsetsMake(HORIZONTAL_BUFFER, 0, HORIZONTAL_BUFFER, HORIZONTAL_BUFFER);
ASInsetLayoutSpec *avatarInset = [ASInsetLayoutSpec insetLayoutSpecWithInsets:avatarInsets child:_userAvatarImageView];
return
// Main stack
[ASStackLayoutSpec
stackLayoutSpecWithDirection:ASStackLayoutDirectionVertical
spacing:0
justifyContent:ASStackLayoutJustifyContentStart
alignItems:ASStackLayoutAlignItemsStretch
children:@[
ASStackLayoutSpec *headerStack = [ASStackLayoutSpec horizontalStackLayoutSpec];
headerStack.alignItems = ASStackLayoutAlignItemsCenter; // center items vertically in horizontal stack
headerStack.justifyContent = ASStackLayoutJustifyContentStart; // justify content to the left side of the header stack
headerStack.children = @[avatarInset, headerSubStack, spacer, _photoTimeIntervalSincePostLabel];
// header inset stack
UIEdgeInsets insets = UIEdgeInsetsMake(0, HORIZONTAL_BUFFER, 0, HORIZONTAL_BUFFER);
ASInsetLayoutSpec *headerWithInset = [ASInsetLayoutSpec insetLayoutSpecWithInsets:insets child:headerStack];
// footer stack
ASStackLayoutSpec *footerStack = [ASStackLayoutSpec verticalStackLayoutSpec];
footerStack.spacing = VERTICAL_BUFFER;
footerStack.children = @[_photoLikesLabel, _photoDescriptionLabel, _photoCommentsView];
// footer inset stack
UIEdgeInsets footerInsets = UIEdgeInsetsMake(VERTICAL_BUFFER, HORIZONTAL_BUFFER, VERTICAL_BUFFER, HORIZONTAL_BUFFER);
ASInsetLayoutSpec *footerWithInset = [ASInsetLayoutSpec insetLayoutSpecWithInsets:footerInsets child:footerStack];
// vertical stack
CGFloat cellWidth = constrainedSize.max.width;
// constrain photo frame size
_photoImageView.style.preferredSize = CGSizeMake(cellWidth, cellWidth);
ASStackLayoutSpec *verticalStack = [ASStackLayoutSpec verticalStackLayoutSpec];
verticalStack.alignItems = ASStackLayoutAlignItemsStretch; // stretch headerStack to fill horizontal space
verticalStack.children = @[headerWithInset, _photoImageView, footerWithInset];
return verticalStack;
// Header stack with inset
[ASInsetLayoutSpec
insetLayoutSpecWithInsets:UIEdgeInsetsMake(0, HORIZONTAL_BUFFER, 0, HORIZONTAL_BUFFER)
child:
// Header stack
[ASStackLayoutSpec
stackLayoutSpecWithDirection:ASStackLayoutDirectionHorizontal
spacing:0.0
justifyContent:ASStackLayoutJustifyContentStart
alignItems:ASStackLayoutAlignItemsCenter
children:@[
// Avatar image with inset
[ASInsetLayoutSpec
insetLayoutSpecWithInsets:UIEdgeInsetsMake(HORIZONTAL_BUFFER, 0, HORIZONTAL_BUFFER, HORIZONTAL_BUFFER)
child:
[_userAvatarImageView styledWithBlock:^(ASLayoutElementStyle *style) {
style.preferredSize = CGSizeMake(USER_IMAGE_HEIGHT, USER_IMAGE_HEIGHT);
}]
],
// User and photo location stack
[[ASStackLayoutSpec
stackLayoutSpecWithDirection:ASStackLayoutDirectionVertical
spacing:0.0
justifyContent:ASStackLayoutJustifyContentStart
alignItems:ASStackLayoutAlignItemsStretch
children:_photoLocationLabel.attributedText ? @[
[_userNameLabel styledWithBlock:^(ASLayoutElementStyle *style) {
style.flexShrink = 1.0;
}],
[_photoLocationLabel styledWithBlock:^(ASLayoutElementStyle *style) {
style.flexShrink = 1.0;
}]
] :
@[
[_userNameLabel styledWithBlock:^(ASLayoutElementStyle *style) {
style.flexShrink = 1.0;
}]
]]
styledWithBlock:^(ASLayoutElementStyle *style) {
style.flexShrink = 1.0;
}],
// Spacer between user / photo location and photo time inverval
[[ASLayoutSpec new] styledWithBlock:^(ASLayoutElementStyle *style) {
style.flexGrow = 1.0;
}],
// Photo and time interval node
[_photoTimeIntervalSincePostLabel styledWithBlock:^(ASLayoutElementStyle *style) {
// to remove double spaces around spacer
style.spacingBefore = HORIZONTAL_BUFFER;
}]
]]
],
// Center photo with ratio
[ASRatioLayoutSpec
ratioLayoutSpecWithRatio:1.0
child:_photoImageView],
// Footer stack with inset
[ASInsetLayoutSpec
insetLayoutSpecWithInsets:UIEdgeInsetsMake(VERTICAL_BUFFER, HORIZONTAL_BUFFER, VERTICAL_BUFFER, HORIZONTAL_BUFFER)
child:
[ASStackLayoutSpec
stackLayoutSpecWithDirection:ASStackLayoutDirectionVertical
spacing:VERTICAL_BUFFER
justifyContent:ASStackLayoutJustifyContentStart
alignItems:ASStackLayoutAlignItemsStretch
children:@[
_photoLikesLabel,
_photoDescriptionLabel,
_photoCommentsView
]]
]
]];
}
#pragma mark - Instance Methods
@@ -181,7 +216,6 @@
ASTextNode *textNode = [[ASTextNode alloc] init];
textNode.layerBacked = YES;
textNode.attributedText = attributedString;
return textNode;
}