Swift Custom view VFL setting constraint violation

1. Added a custom view,view on the TableView cell with rounded corners, gradients,

The Modify button and delete button are displayed when the number is 0, and when the model copy is changed dynamically, the cell height will be reused.

Workaround: Custom view needs to use Cardview.setneedsdisplay () when TableView is dynamically assigned to the cell, guessing: view does not automatically call redraw method, causing

Custom view constraint violations on 2.cell, you need to first hide the previously displayed constraints and controls, display the constraints and controls that need to be displayed, have a wrong order, conflict, the interface is not displayed, but print

Swift Custom view VFL setting constraint violation