UITableView Cell Missing Delete button

Phenomenon: When beginners use TableView, the deletion of the cell, found when the click Edit, or slide the cell, the left side of the red minus sign can come out, but the right delete button does not come out.

Reason: This is a low-level error, beginners to the layout is not ripe when, may be committed, in fact, not delete button did not come out, but delete the button hidden in the screen, do not believe you turn screen for horizontal screen try, maybe you can see Oh!

Liberation method: Reset the TableView layout to the proposed constraint.

This article from "Graceful Swift" blog, declined reprint!

UITableView Cell Missing Delete button