Use AutoLayout to set the same spacing for multiple buttons

In storyboard, if you want to set multiple buttons with AutoLayout in the same spacing, and adjust the spacing according to the width of the screen, I understand that there is no direct setup method. Only using the Storyboard+ code method to implement

1, first place four buttons in storyboard, and select them at the same time

2, set wide, high, supview the distance of the lower boundary and other constraints

Font3, select the first button when Setup is complete

4, set its constraint from the left edge

5, set a second, and so on

6, write the Iboutlte in the code, which is four buttons to the edge of the constraint and the width of one of the buttons constraints

7, select Viewcontroller

8, start connecting.

9, write down the following code in Viewcontroller

Use AutoLayout to set the same spacing for multiple buttons