如何在swift中将月份名称数组转换为月份数[重复]

Question

在我的项目中，我从选择器视图中选择月份名称放置在文本字段中。但我必须将月份数发送到服务器。

这是我的月份数组

var monthsArray = ["JANUARY","FEBRUARY","MARCH","APRIL","MAY","JUNE","JULY","AUGUST","SEPTEMBER","OCTOBER","NOVEMBER","DECEMBER"]

我遇到了一个问题。例如，如果我选择四月，我必须将 4 发送到服务器，如何执行此任务请有人帮助/建议我。

Answer 1

如果你有文本值，只需在数组中找到该值的索引，然后加 1（因为数组是基于零索引的）

这样的事情应该可以工作：

var monthsArray = ["JANUARY","FEBRUARY","MARCH","APRIL","MAY","JUNE","JULY","AUGUST","SEPTEMBER","OCTOBER","NOVEMBER","DECEMBER"]
if let index = monthsArray.index(of: "APRIL") { // index will be 3 (zero based)
    let monthNumber = index + 1 // +1 as explained earlier
    print(monthNumber) // output: 4
}

Answer 2

这样的功能可能会有所帮助

func getMonthIndex(_ month: String) -> Int {
    let months = ["JANUARY","FEBRUARY","MARCH","APRIL","MAY","JUNE","JULY","AUGUST","SEPTEMBER","OCTOBER","NOVEMBER","DECEMBER"]
    var monthIndex = -1
    if let idx = months.index(of: month.uppercased()) {
        monthIndex = idx + 1
    }
    return monthIndex
}

可以如下使用：

var idx = getMonthIndex("January")  //1
idx = getMonthIndex("JANUARY") //1
idx = getMonthIndex("DECEMBER") //12
idx = getMonthIndex("DECEMBERRRR") //-1

在上面的片段中，“month.uppercased()”非常重要，这将有助于在所有情况下识别月份，例如“January”、“JANUARY”或“january”