UIView¶

Identify UIView Uniquely¶

Identify uniquely which UIView is in the reference and utilize accessibility identifier to get its values.

Uniquely identifying views

hacking With swift

Invoke UIViewController¶

Init() the custom UIView controller by defining the function

// MARK: - Inits
    init(isPushed: Bool) {
        self.isDisplayed = isDisplayed
        super.init(nibName: nil, bundle: nil)
    }

Error

'required' initializer 'init(coder:)' must be provided by subclass of 'UIViewController'

You can avoid this by initializing the init\(coder:\)

required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

Remove UIView¶

Remove the child view from superview by this command.

view_object_name.removeFromSuperview()

Programmatic collection of UIViews

var allocatedViews: [UIView] = [UIView]()

// Programmatic adding UIViews 
for i in 0..<n {
    let childView = UIView()
    self.view.addSubview(childView)
    allocatedViews.append(childView)
}


// Programmatic deallocating UIViews
for view in allocatedViews {
    view.removeFromSuperview()
}

SO

Article

Custom Parameters¶

You can utilize UIView(autoLayout = true)

private lazy var customView = UIView(useAutoLayout: true)

This will help us to remove the horrendous long variable setup with every override func viewDidLoad()

customView.translatesAutoresizingMaskIntoConstraints = false

Changes¶

iOS 13 changes SO

Alpha¶

UIView Alpha vs UIView Subview alpha. Alpha is the property which can basically alter a UI presentation to have full opaque visibility or have transparent visibility. So the view behind the foremost UIView gets displayed to have a hint that the UI is still present in the back of that UIView instance or UIWindow.

https://stackoverflow.com/questions/20423390/uiview-alpha-vs-uicolor-alpha