GoneVisible

GoneVisible is a UIView extension that uses AutoLayout to add "gone" state like Android.

You can easily change the size constraint constant of UIView to 0 without adding IBOutlet property of size constraint. GoneVisible supports iOS and is written in Swift.

Additional notes: This library will be useful for projects targeting iOS 8. If your project is targeting iOS 9 or higher, I recommend you consider implementing with UIStackView before using this library. 　
　

Requirements

• Swift 4.0
• iOS 8.0+
• Xcode 9

Installation

Manual

Simply drag UIView+GoneVisible.swift into your project.

Cocoapods

• Add into your Podfile.

pod "GoneVisible"

Then $ pod install

• Add import GoneVisible to the top of your files where you wish to use it.

Usage

・Gone.

view.gone()

・Visible.

view.visible()

・When setting to Gone, set the space constraint constant together to 0.

view.gone(spaces: [.trailing])

・With "gone" you can specify whether it is vertical or horizontal. It is useful when animating.

view.gone(axis: .vertical)

Example Code

Here is the code for this example project. You do not need to import constraints by IBoutlet to control size.

import UIKit
import GoneVisible

class ViewController: UIViewController {

    @IBOutlet weak private var blackView: UIView!
    @IBOutlet weak private var redView: UIView!
    @IBOutlet weak private var blueView: UIView!
    @IBOutlet weak private var yellowButton: UIButton!
    @IBOutlet weak private var errorMessageLabel: UILabel!
    @IBOutlet weak private var toggleSwitch: UISwitch!

    override func viewDidLoad() {
    super.viewDidLoad()

        // When you want to display in "gone" state from the beginning.
//        toggleSwitch.isOn = false
//        goneViews()
    }

    @IBAction func toggleSwitchValueChanged(_ sender: UISwitch) {
        if toggleSwitch.isOn {
            visibleViews()
            UIView.animate(withDuration: 0.3) { view.layoutIfNeeded() }
        } else {
            goneViews()
            UIView.animate(withDuration: 0.3) { view.layoutIfNeeded() }
        }
    }

    private func goneViews() {
        blackView.gone()
        redView.gone(axis: .vertical, spaces: [.bottom])
        blueView.gone(axis: .horizontal, spaces: [.trailing])
        yellowButton.gone(axis: .horizontal, spaces: [.trailing])
        errorMessageLabel.gone(axis: .vertical)
    }

    private func visibleViews() {
        blackView.visible()
        redView.visible()
        blueView.visible()
        yellowButton.visible()
        errorMessageLabel.visible()
    }

}

See also:

• 🔗 iOS Example Project

Author

Teruto Yamasaki, y.teruto@gmail.com

License

The MIT License (MIT)
See the LICENSE file for more info.