How to create Auto layout equal width constraint programmatically in ios swift?

Question

How to give programmatically constraints equal width and equal height with multiple views.I check google but not perfect answer for programmatically equal width and height const

Answer 1

Try this:

let widthConstraint = NSLayoutConstraint(item: customView, attribute: .width, relatedBy: .equal, toItem: viewForRow1, attribute: .width, multiplier: 0.25, constant: 0.0)

multiplier: 0.25, denotes that customView's width will be 1/4th of the parent view, viewForRow1.

Answer 2

You have three possible ways to do that:

1) By using anchors:

view.widthAnchor.constraint(equalTo: otherView.widthAnchor, multiplier: 1.0).isActive = true

2) Visual format:

simple example - "H:|[otherView]-[view(==otherView)]|"

3) "Old school" constraints:

NSLayoutConstraint(item: #view, attribute: .width, relatedBy: .equal, toItem: #otherView, attribute: .width, multiplier: 1.0, constant: 0.0).isActive = true

hope it will help somebody.