Question

使用可可绑定，我希望根据是否选中此复选框来启用或禁用弹出按钮。

我正在以编程方式将复选框和弹出窗口添加到这样的堆栈视图中：

  private func addCheckBoxes() {
        for period in String.BuildTimePeriod.allCases {
            let checkbox = NSButton(checkboxWithTitle: period.rawValue.capitalized, target: self, action: nil)
            checkbox.bind(.value, to: NSUserDefaultsController.shared, withKeyPath: "values.\(period.defaultsBoolKey.rawValue)", options: [NSBindingOption.continuouslyUpdatesValue: true])
            stackView.addArrangedSubview(checkbox)
            addPopUpToCheckbox(checkbox, period: period)
        }
    }

    private func addPopUpToCheckbox(_ checkbox: NSButton, period: String.BuildTimePeriod) {
        let popUp = NSPopUpButton(frame: checkbox.frame, pullsDown: false)
        let timeBlocks = String.TimeBlock.allCases.map() { $0.rawValue.capitalized }
        popUp.addItems(withTitles: timeBlocks)
        popUp.bind(.selectedValue, to: NSUserDefaultsController.shared, withKeyPath: "values.\(period.rawValue)", options: [NSBindingOption.continuouslyUpdatesValue: true])
        popUp.bind(.enabled, to: checkbox, withKeyPath: "state", options: [NSBindingOption.continuouslyUpdatesValue : true])
        stackView.addArrangedSubview(popUp)
    }

绑定在控制器的初始负载上起作用，但是popups启用状态不会动态更改。想知道是否有人可以提供任何指导。

Answer 1

感谢@Willeke，我意识到这是因为我只是在引用"state"，而不是按钮所需要的"cell.state"。

尝试将NSPopupButton的`enabled`属性绑定到复选框的状态

1 个答案: