IOS-Automatic Layout code version (original) and ios-original layout code

IOS-Automatic Layout code version (original) and ios-original layout code
Introduction basic knowledge under certain circumstances we need to use autolayout so that we can associate the positions of views and views.

Horizontal: The minimum width of the 100 view on the left of the parent view is 100, and the minimum width is 100 on the right of the parent view.

Vertical: the height of the 150 view on the top of the parent view is 40.

VFL: Visual Format Lanaguage Visual Format language

| Indicates the parent view.

-Itself indicates a distance

-Distance: indicates the specified distance.

[View name] other views

[String Representation view] reference View

[String Representation of the view (view width and height, minimum maximum width and height, or relative width and height parameters)]