Constraints for dynamically size uilabel width programmatically

Question

I have two labels set completely programmatically. Label two should always be up against the right edge of label one (with a small space between them). Label one has its width set to be equal to its content size unless it hits a max width. Visually:

|Label one| |Label two|

I need the following constraints:

Label one should resize width wise unless it hits a max size.
Label two should always be up against the right edge of label one

How do I set these constraints programmatically?

Kevvv Kevvv · Accepted Answer · 2021-01-04T05:00:05

lessThanOrEqualToConstant for the widthAnchor should do the job.

let labelOne = UILabel()
labelOne.text = "label1"
let labelTwo = UILabel()
labelTwo.text = "label2"

labelOne.translatesAutoresizingMaskIntoConstraints = false
labelTwo.translatesAutoresizingMaskIntoConstraints = false

view.addSubview(labelOne)
view.addSubview(labelTwo)

NSLayoutConstraint.activate([
    labelOne.topAnchor.constraint(equalTo: view.topAnchor),
    labelOne.leadingAnchor.constraint(equalTo: view.leadingAnchor),
    labelOne.widthAnchor.constraint(lessThanOrEqualToConstant: 100),
    
    labelTwo.leadingAnchor.constraint(equalToSystemSpacingAfter: labelOne.trailingAnchor, multiplier: 1),
    labelTwo.topAnchor.constraint(equalTo: view.topAnchor)
])

Constraints for dynamically size uilabel width programmatically

2 Answers