Variable height using constraints

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You can make an UILabel with a dynamic height using auto layout.

You need to set the numberOfLines to zero (0), and add a minimal height by setting up a constraints with a relation of type .GreaterThanOrEqual on the .Height attribute


label.numberOfLines = 0

let heightConstraint = NSLayoutConstraint(
    item: label,
    attribute: .Height,
    relatedBy: .GreaterThanOrEqual,
    toItem: nil,
    attribute: .NotAnAttribute,
    multiplier: 0,
    constant: 20



label.numberOfLines = 0
label.translatesAutoresizingMaskIntoConstraints = false
label.heightAnchor.constraintGreaterThanOrEqualToConstant(20).active = true

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