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 GoneVisibleto 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:
Author
Teruto Yamasaki, [email protected]
License
The MIT License (MIT)
See the LICENSE file for more info.