ChangeHandler

public class ChangeHandler

Works in conjunction with will-change and did-change notifications that are delivered to a UI control when an associated Property’s underlying value is changing asynchronously.

  • Undocumented

    Declaration

    Swift

    public init()

  • Undocumented

    Declaration

    Swift

    public init(onLock: @escaping () -> Void, onUnlock: @escaping () -> Void)

  • Resets the change count to zero and calls onUnlock if the change count was previously non-zero. Must be called on UI thread.

    Declaration

    Swift

    public func resetCount()

  • Increments the change count by the given amount. If the change count goes from 0 to >= 1, onLock will be invoked. Must be called on UI thread.

    Declaration

    Swift

    public func incrementCount(_ inc: Int)

  • Decrements the change count by the given amount. If the change count goes to 0, onUnlock will be invoked. Must be called on UI thread.

    Declaration

    Swift

    public func decrementCount(_ dec: Int)

  • Notes that a change is coming. If the change count goes to 1, onLock will be invoked. Must be called on UI thread.

    Declaration

    Swift

    public func willChange()

  • Notes that a change has occurred. If the change count goes to 0, onUnlock will be invoked. Must be called on UI thread.

    Declaration

    Swift

    public func didChange()