将rx.value添加到我的CustomView

Question

假设我有一个带有值的CustomView.我想使用rx.value(Observable)将该值公开给世界,而不是必须通过值(Int)访问它.

final class CustomView: UIView {
   var value: Int = 0
   ...
}

我从UIStepper + Rx复制了这个:

extension Reactive where Base: CustomView {

    var value: ControlProperty<Int> {
        return base.rx.controlProperty(editingEvents: [.allEditingEvents, .valueChanged],
            getter: { customView in
                customView.currentValue
        }, setter: { customView, value in
            customView.currentValue = value
        }
        )
    }

}

final class CustomView: UIControl {

    fileprivate var currentValue = 1 {
        didSet {
            checkButtonState()
            valueLabel.text = currentValue.description
        }
    }

   // inside i set currentValue = 3
}

但customView.rx.value不会发出任何值

Answer 1

缺少的是,你需要发送动作UIControl.检查下一个示例:

class CustomView: UIControl {
    var value: Int = 0 {
        didSet { sendActions(for: .valueChanged) } // You are missing this part
    }
}

extension Reactive where Base: CustomView {

    var value: ControlProperty<Int> {
        return base.rx.controlProperty(editingEvents: UIControlEvents.valueChanged,
                                       getter: { customView in
                                        return customView.value },
                                       setter: { (customView, newValue) in
                                        customView.value = newValue})
    }

}