My App crashes because of the heightConstraints I don't know how to fix it

Question

When I comment out the constraints it works perfectly, but the problem is the height of the textfield becomes too small, when I add the heightConstraint , it works fine in my iPhone XS Max , but crashes in other Iphones...

lazy var textField: MaterialTexField = { //MaterialTexField

    let tf = MaterialTexField()
    tf.translatesAutoresizingMaskIntoConstraints = false
    self.contentView.addSubview(tf)

    NSLayoutConstraint.activate([
        tf.leadingAnchor.constraint(equalTo: self.contentView.leadingAnchor, constant:16.0),
        tf.trailingAnchor.constraint(equalTo: self.contentView.trailingAnchor, constant:-16.0),
        tf.topAnchor.constraint(equalTo: self.contentView.topAnchor, constant:8.0),
        tf.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: 1),
//This is the problematic constraints
        tf.heightAnchor.constraint(lessThanOrEqualTo:self.contentView.heightAnchor, multiplier:0.9)

    return tf

}()

Answer 1

Would you please try this

tf.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor, constant: 1.0),

instead of

tf.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: 1),

Answer 2

tf.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor, constant: 1)

Try this first, if this doesnot solve your problem then remove bottomanchor

Either use heightConstraint or use topAnchor and bottomAnchor . Don't use both cause xcode will not understand what to do, you are just making it confuses by giving height and autolayout .