[英]How do I get the name of a day of the week in the user's locale?
我有一個介於 1 和 7 之間的數字,我想將其轉換為用戶的語言環境,相當於周一到周日。 我可以這樣做嗎?如果可以,怎么做?
NSDateFormatter
可以為您提供名稱列表:
NSDateFormatter * df = [[NSDateFormatter alloc] init];
[df setLocale: [NSLocale currentLocale]];
NSArray * weekdays = [df weekdaySymbols];
然后你可以像任何其他數組一樣索引[weekdays objectAtIndex:dayIdx];
但是請注意, 第一個工作日可能因地區而異; 它究竟如何變化(以及關於NSCalendar
許多其他事情)在文檔中並沒有特別好解釋。
這是我的看法:
斯威夫特 3, iOS8+
func weekdayNameFrom(weekdayNumber: Int) -> String {
let calendar = Calendar.current
let dayIndex = ((weekdayNumber - 1) + (calendar.firstWeekday - 1)) % 7
return calendar.weekdaySymbols[dayIndex]
}
請注意,您有 3 個可用列表:
weekdaySymbols
-> ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
shortWeekdaySymbols
-> ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
veryShortWeekdaySymbols
-> ["S", "M", "T", "W", "T", "F", "S"]
當然可以。 下面是一個方法/函數,它返回 0 到 6 范圍內工作日編號的工作日名稱。
目標 C 版本:
- (NSString *)weekdayNameFromWeekdayNumber:(NSInteger)weekdayNumber
{
NSCalendar *calendar = [NSCalendar currentCalendar];
// Fetch the days of the week in words for the current language (Sunday to Saturday)
NSArray *weekdaySymbols = calendar.weekdaySymbols;
// Because the first week day changes depending on the region settings.
// ie. In Bangladesh the first day of the week is Friday. In UK it is Monday
NSInteger index = (weekdayNumber + calendar.firstWeekday - 1) % 7;
return weekdaySymbols[index];
}
和 Swift 2 版本:
func weekdayNameFromWeekdayNumber(weekdayNumber: Int) -> String {
let calendar = NSCalendar.currentCalendar()
let weekdaySymbols = calendar.weekdaySymbols
let index = (weekdayNumber + calendar.firstWeekday - 1) % 7
return weekdaySymbols[index]
}
和 Swift 3.0 版本:
func weekdayNameFrom(weekdayNumber: Int) -> String {
let calendar = Calendar.current
let weekdaySymbols = calendar.weekdaySymbols
let index = (weekdayNumber + calendar.firstWeekday - 1) % 7
return weekdaySymbols[index]
}
基於gavdotnet優秀方案,歐版(周一開始)為:
func weekdayNameFromWeekdayNumber(weekdayNumber: Int) -> String {
var EuroDay = weekdayNumber + 1
if EuroDay == 7 {
EuroDay = 0
}
let calendar = NSCalendar.currentCalendar()
let weekdaySymbols = calendar.weekdaySymbols
let index = EuroDay + calendar.firstWeekday - 1
return weekdaySymbols[index].uppercaseString
}
NSArray *weekdaySymbols = [[NSDateFormatter alloc] weekdaySymbols];
您可以使用 {weekdaySymbols、shortWeekdaySymbols、veryShortWeekdaySymbols} 之一
我找到了這個解決方案:你有你的日期對象,你想從那個對象中獲取星期幾。
將語言環境設置為您的日期格式化程序,如下所示
let eventDate = dateFormatter.date(from: self) let language = Locale.preferredLanguages.first print("The locale id is \\(language)") // This date format can be what ever you like, in this case i used EE dd dateFormatter.dateFormat = "EE dd" if let idiomaLocale = language { dateFormatter.locale = Locale(identifier: idiomaLocale) } else { dateFormatter.locale = Locale(identifier: "es_CO") }
這樣做您可以確保您獲得了正確的日期格式化程序標識符,然后配置了您的日期格式化程序,您可以繼續並獲取星期幾的字符串
//convert your date to string let stringDate = dateFormatter.string(from: eventDate!) return stringDate
我希望這對某人有所幫助:)。 新年快樂。
如果您正在處理 Date 對象,假設您已將本地化選項添加到您的項目中,您可以輕松使用以下代碼:
extension Date {
var dayName: String {
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: Locale.current.identifier)
dateFormatter.dateFormat = "E" // "EEEE" to get long style
return dateFormatter.string(from: self)
}
}
這將自動檢測您的應用程序的語言並將本地化的日期輸出為字符串。
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