Created
May 31, 2024 02:25
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| class ViewController: UIViewController { | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| let label1 = addLabel(with: "I am a dynamic object") | |
| let spacer1 = addSpacer() | |
| let label2 = addLabel(with: "Me too.") | |
| let spacer2 = addSpacer() | |
| let label3 = addLabel(with: "Me three") | |
| let spacer3 = addSpacer() | |
| let label4 = addLabel(with: "hi.") | |
| NSLayoutConstraint.activate([ | |
| label1.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor), | |
| label1.bottomAnchor.constraint(equalTo: spacer1.topAnchor), | |
| label2.topAnchor.constraint(equalTo: spacer1.bottomAnchor), | |
| label2.bottomAnchor.constraint(equalTo: spacer2.topAnchor), | |
| label3.topAnchor.constraint(equalTo: spacer2.bottomAnchor), | |
| label3.bottomAnchor.constraint(equalTo: spacer3.topAnchor), | |
| label4.topAnchor.constraint(equalTo: spacer3.bottomAnchor), | |
| label4.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor), | |
| spacer1.heightAnchor.constraint(equalTo: spacer2.heightAnchor), | |
| spacer2.heightAnchor.constraint(equalTo: spacer3.heightAnchor) | |
| ]) | |
| } | |
| func addLabel(with text: String) -> UILabel { | |
| let label = UILabel() | |
| label.translatesAutoresizingMaskIntoConstraints = false | |
| label.text = text | |
| label.textAlignment = .center | |
| view.addSubview(label) | |
| NSLayoutConstraint.activate([ | |
| label.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20), | |
| label.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20), | |
| ]) | |
| return label | |
| } | |
| func addSpacer() -> UILayoutGuide { | |
| let spacer = UILayoutGuide() | |
| view.addLayoutGuide(spacer) | |
| return spacer | |
| } | |
| } |
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The
UILayoutGuideobjects have no view associated with them, so while they appear in the view debugger hierarchy in the panel on the left, there is no associated view in the main panel on the right: