ios - Swift:未使用 viewWillTransition 中调用函数的结果

Question

我正在使用具有两种 View 类型的日历 cocoapod(CVCalendar:https://github.com/CVCalendar/CVCalendar)；周 View 和月 View 。 Pod 中需要以下功能，我在类扩展中拥有它:

 func presentationMode() -> CalendarMode {

    let isPhone: Bool = UIDevice.current.userInterfaceIdiom == .phone
    let isLandscape: Bool = UIDevice.current.orientation.isLandscape

    if isPhone == true && isLandscape == true {
        return.weekView
    } else {
            return .monthView
    }
}

如果日历显示在横向的 iPhone 上，我会尝试显示 weekView，如果它显示在其他任何东西上，我会尝试显示 monthView。然后我调用 viewWillTransition 中的函数:

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)

       self.presentationMode()

    }

但是，当使用上面的代码时，我收到警告“Result of call to 'presentationMode' is unused and the view does not change to weekView in IPhone Lanscape.

Answer 1

请更新函数

func presentationMode() -> CalendarMode {
    let isPhone: Bool = UIDevice.current.userInterfaceIdiom == .phone
    let isLandscape: Bool = UIDevice.current.orientation.isLandscape

    if isPhone == true && isLandscape == true {
        return.weekView
    } else {
        return .monthView
    }
}

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)
    self.calendarView.calendarMode = self.presentationMode()
    self.calendarView.commitCalendarViewUpdate()
}