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53 lines
1.6 KiB
Markdown
Executable File
53 lines
1.6 KiB
Markdown
Executable File
---
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title: Layout Options
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layout: docs
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permalink: /docs/layout-options.html
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prevPage: automatic-layout-debugging.html
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nextPage: layer-backing.html
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---
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When using Texture, you have three options for layout. Note that UIKit Autolayout is **not** supported by Texture.
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#Manual Sizing & Layout
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This original layout method shipped with Texture 1.0 and is analogous to UIKit's layout methods. Use this method for ASViewControllers (unless you subclass the node).
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`[ASDisplayNode calculateSizeThatFits:]` **vs.** `[UIView sizeThatFits:]`
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`[ASDisplayNode layout]` **vs.** `[UIView layoutSubviews]`
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###Advantages (over UIKit)
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- Eliminates all main thread layout cost
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- Results are cached
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###Shortcomings (same as UIKit):
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- Code duplication between methods
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- Logic is not reusable
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#Unified Sizing & Layout
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This layout method does not have a UIKit analog. It is implemented by calling
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`- (ASLayout *)calculateLayoutThatFits: (ASSizeRange)constraint`
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###Advantages
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- zero duplication
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- still async, still cached
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###Shortcomings
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- logic is not reusable, and is still manual
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# Automatic, Extensible Layout
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This is the reccomended layout method. It does not have a UIKit analog and is implemented by calling
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`- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constraint`
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###Advantages
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- can reuse even complex, custom layouts
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- built-in specs provide automatic layout
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- combine to compose new layouts easily
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- still async, cached, and zero duplication
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The diagram below shows how options #2 and #3 above both result in an ASLayout, except that in option #3, the ASLayout is produced automatically by the ASLayoutSpec.
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<INSERT DIAGRAM>
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