Compositional Layout, Unable to simultaneously satisfy constraints.

Autolayout issue with Compositonal Layout

collectionview compositional layout with estimated height not working

 

 

Compositional Layout을 사용해 CollectionView를 구성하던 중,

[LayoutConstraints] Unable to simultaneously satisfy constraints. 에러가 발생해 작성

 

 

 

NSCollectionLayoutSize의 heightDimension에 .estimated(100) 이 원인인 이슈로 보인다.

 

해결 방법

1. set the same height dimension to both the item and the group. 

- 나의 경우엔 item, group 모두 .estimated(100) 이었기에 해당하지 않음, 다른 constraints 이슈로 보임

2. Setting the priority of the bottom or trailing constraint (based on you want dynamic height or dynamic width) to 999
- 동적 height width 사이즈를 결정하는 bottom, trailing에 priority를 설정해 충돌 피함, 이 방법 통해 해결

 

before

after

참고 링크

https://developer.apple.com/forums/thread/124346

https://stackoverflow.com/questions/58339188/collection-view-compositional-layout-with-estimated-height-not-working

Collection View Compositional Layout with estimated height not working