我尝试编辑文本时，searchBar.rx.textDidBeginEditing不起作用

Question

    searchBar.rx.textDidBeginEditing
        .subscribe { [unowned self] in
            print("im begining diting")
            self.searchBar.setShowsCancelButton(true, animated: true)
        }
        .disposed(by: disposeBag)

它不起作用，也许我的方法错误？但是我有方法

    searchBar.rx.text
        .asObservable()
        .bind(to: directoryViewModel.searchTextObservable)
        .disposed(by: disposeBag)

它正常工作

Answer 1

我忘了穿上下一步：

searchBar.rx.textDidBeginEditing
.subscribe(onNext: { [unowned self] in

    self.searchBar.setShowsCancelButton(true, animated: true)

}).disposed(by: disposeBag)