Texture - code reading

Updated

May 9, 2021 3:16 PM

Created

Apr 22, 2021 12:45 AM

Tags

Texture (AsyncDisplayKit)

Keywords

How Texture calculates Layout

protocol ASLayoutElement

class ASDisplayNode conforms
class ASLayoutSpec conforms

ASLayoutElement has

set of layoutThatFits
set of calculateLayoutThatFits

layoutThatFits is entry point to start laying out.
calculateLayoutThatFits would be called from layoutThatFits

for example

layoutThatFits

calculateLayoutThatFits

layoutThatFits

calculateLayoutThatFits

recursively

So, calculateLayoutThatFits gives us to chance to customize layout.

❓

I wonder why this code would not work if I change to layout https://github.com/TextureCommunity/TextureBridging/blob/master/TextureBridging/NodeView.swift#L173

How Texture applies the layout

ASDisplayNode._layoutSublayouts applies the calculated layout to its view or layer.

Memo

setNeedsLayout

invalidateCalculatedLayout

layoutVersion++

_layoutSublayouts

set frame to node.frame

_u_setNeedsLayoutFromAbove