swift: 双向绑定，代码举例

例子一：

事件绑定，直接触发

置顶显示，滚动消失

点击显示，再点消失

var panelHidden = BehaviorSubject<Bool>(value: false)

bottomBoard.rhsMenuB.rx.tap.subscribe { () in
            self.panelHidden.onNext(self.bottomBoard.rhsMenuB.isSelected)
        }.disposed(by: rx.disposeBag)
        
        panelHidden.asObservable().bind(to: panelG.rx.isHidden).disposed(by: rx.disposeBag)
        panelHidden.map { (haha) -> Bool in
            haha == false
        }.asObservable().bind(to: bottomBoard.rhsMenuB.rx.isSelected).disposed(by: rx.disposeBag)

间接触发

extension PlayerController: UIScrollViewDelegate{
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        
        if case EnterP_src.custom = p_input{
            panelHidden.onNext(tShowD.contentOffset.y > 3)
        }
        else{
            panelHidden.onNext(contentHan.contentOffset.y > 3)
        }
    }
}

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例子2：

事件绑定，直接触发

点击出现，再点收起

var topChoosePopHidden = BehaviorSubject<Bool>(value: true)


rhsMostMenuBtn.rx.tap.subscribe { () in
            self.topChoosePopHidden.onNext(self.rhsMostMenuBtn.isSelected)
        }.disposed(by: rx.disposeBag)
        
        
topChoosePopHidden.asObservable().subscribe(onNext: { (toHid) in
            if toHid == false, self.playingSelected{
                self.playingSelected.toggle()
                self.toPause()
            }
            UIView.animate(withDuration: 0.3) {
                if toHid{
                    self.constraintA.bottomChoosePop?.constraint.update(offset: 0)
                }
                else{
                    self.constraintA.bottomChoosePop?.constraint.update(offset: self.progressChoosePop.popH)
                }
                self.view.layoutIfNeeded()
            }
        }).disposed(by: rx.disposeBag)
        
        
topChoosePopHidden.asObservable().map { (ququ) -> Bool in
            ququ == false
        }.asObservable().bind(to: rhsMostMenuBtn.rx.isSelected).disposed(by: rx.disposeBag)

间接触发

func to(page direction: Orientation){
        topChoosePopHidden.onNext(true)
}