Altium Designer 文档
...
((PCB Query Functions))_AD
PCB Query((Membership Checks))_AD
Query_Lang-PCBFunctions_MembershipChecks_ExistsOnLayerExistsOnLayer_AD
Created: 十月 31, 2018 | Updated: 十月 31, 2018
| Applies to versions: 18.0, 18.1, 19.0, 19.1, 20.0, 20.1 and 20.2
您正在阅读的是 19. 版本。关于最新版本，请前往 Query_Lang-PCBFunctions_MembershipChecks_ExistsOnLayer((ExistsOnLayer))_AD 阅读 21 版本
Parent page: PCB Query Functions - Membership Checks
Summary
Returns all objects that exist on the specified layer.
Syntax
ExistsOnLayer(Layer : String) : Boolean/Boolean_String
Example Usage
ExistsOnLayer('Top Layer')
ExistsOnLayer('Top Layer') = True
ExistsOnLayer('Top Layer') = 'True'
Returns all objects that exist on the Top Layer.
Not ExistsOnLayer('Mechanical 3')
ExistsOnLayer('Mechanical 3') = False
ExistsOnLayer('Mechanical 3') = 'False'
Returns all objects except objects that exist on the Mechanical 3 layer.
Tips
- The single quote characters (') at the start and end of
Layerare mandatory.