0

我有一个日历，当我选择一天时，我想选择一整行（周）。这是我到目前为止的代码：

//When a date is selected
func calendar(_ calendar: JTAppleCalendarView, didSelectDate date: Date, cell: JTAppleCell?, cellState: CellState) {

    selectTheWeek(of: date)
    setupLayoutCell(cell: cell, cellState: cellState)

}

func selectTheWeek(of date: Date) {
    let starOfTheWeek = date.startOfWeek()
    let endOfTheWeeK = date.endOfWeek()
    calendarCollectionView.selectDates(from: starOfTheWeek, to: endOfTheWeeK)
}

extension Date {
func startOfWeek() -> Date {
    let calendar = Calendar.autoupdatingCurrent
    let currentDateComponents = calendar.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)
    return calendar.date(from: currentDateComponents)!
}

func endOfWeek() -> Date {
    let cal = Calendar.autoupdatingCurrent
    var component = DateComponents()
    component.weekOfYear = 1
    component.day = -1
    return cal.date(byAdding: component, to: startOfWeek())!
}
}

问题是我有一个无限循环，原因很清楚。但我不知道如何防止它。有什么帮助吗？

JTAppleCalender是一个外部库。它是collectionView.

4

3 回答 3

1

您可以使用 2 种技术来打破循环。

首先：

calendarViewselectDates(from: starOfTheWeek, to: endOfTheWeeK, triggerSelectionDelegate: false)

通过设置triggerSelectionDelegate为 false，您的委托函数didSelect将不会被调用。

第二：

如果您正在使用MasterBranch代码（我将在一周左右发布），您可以知道您的选择是由程序员发起还是由用户发起。您可以通过 --> cellState 了解这一点。

if cellState.selectionType == .programatic {
   // ignore stuff        
} else {
   // Do stuff
}

您可以将此 if 语句放在您的shouldSelect函数中。

于 2017-10-16T14:54:52.547 回答
0

我知道这不是最好的解决方案，但它可以避免您的问题

//When a date is selected
var shouldSelectWeek = true
func calendar(_ calendar: JTAppleCalendarView, didSelectDate date: Date, cell: JTAppleCell?, cellState: CellState) {
    if shouldSelectWeek{
        selectTheWeek(of: date)
        shouldSelectWeek = false
    }
    setupLayoutCell(cell: cell, cellState: cellState)


}

func selectTheWeek(of date: Date) {
    let starOfTheWeek = date.startOfWeek()
    let endOfTheWeeK = date.endOfWeek()
    calendarCollectionView.selectDates(from: starOfTheWeek, to: endOfTheWeeK)
}

extension Date {
    func startOfWeek() -> Date {
        let calendar = Calendar.autoupdatingCurrent
        let currentDateComponents = calendar.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)
        return calendar.date(from: currentDateComponents)!
    }

    func endOfWeek() -> Date {
        let cal = Calendar.autoupdatingCurrent
        var component = DateComponents()
        component.weekOfYear = 1
        component.day = -1
        return cal.date(byAdding: component, to: startOfWeek())!
}
于 2017-10-16T13:13:11.293 回答
0

只需添加一个新的布尔变量var shouldIgnoreDateSelection = false，然后你就可以

func calendar(_ calendar: JTAppleCalendarView, didSelectDate date: Date, cell: JTAppleCell?, cellState: CellState) {
    if shouldIgnoreDateSelection == false {
        selectTheWeek(of: date)
    }
    setupLayoutCell(cell: cell, cellState: cellState)
}

func selectTheWeek(of date: Date) {
    let starOfTheWeek = date.startOfWeek()
    let endOfTheWeeK = date.endOfWeek()
    shouldIgnoreDateSelection = true
    calendarCollectionView.selectDates(from: starOfTheWeek, to: endOfTheWeeK)
    shouldIgnoreDateSelection = false
}
于 2017-10-16T13:42:55.197 回答