格式化一天中的时间 Swift Morning/Afternoon/Evening/Any 时间

Question

我正在尝试找到一种方法来获取一天中的时间。显然有一个简单的方法可以做到 Application to Display Morning,Evening 如果您对一种语言的静态词没问题。有没有办法根据语言环境来制作它？ NSDateComponentsFormatter 似乎无法解决问题。

Answer 1

实际上，您可以像这样在 NSDateFormatter 中设置语言环境：

let df = NSDateFormatter()

df.locale = NSLocale.currentLocale()

此日期格式化程序将帮助您在 currentLocale 中打印日期。

但对于您所期望的，您必须实施本地化才能获得 "Morning"、"Afternoon"、"Night" 字符串的本地化字符串。

充其量，您可以对您的约会对象执行此操作：

NSDateFormatter-doesRelativeDateFormatting中有一个属性。它会将日期格式化为正确语言环境中的相对日期。

来自Apple's Documentation：

If a date formatter uses relative date formatting, where possible it replaces the date component of its output with a phrase—such as “today” or “tomorrow”—that indicates a relative date. The available phrases depend on the locale for the date formatter; whereas, for dates in the future, English may only allow “tomorrow,” French may allow “the day after the day after tomorrow,” as illustrated in the following example.

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.timeStyle = NSDateFormatterNoStyle;
dateFormatter.dateStyle = NSDateFormatterMediumStyle;
NSLocale *frLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"fr_FR"];
dateFormatter.locale = frLocale;

dateFormatter.doesRelativeDateFormatting = YES;

NSDate *date = [NSDate dateWithTimeIntervalSinceNow:60*60*24*3];
NSString *dateString = [dateFormatter stringFromDate:date];

NSLog(@"dateString: %@", dateString);
// Output
// dateString: après-après-demain

Answer 2

以下是我使用 Swift 解决问题的方法 2. 首先，我使用 this article 来识别一天中的不同时段。从那里开始，我使用了一系列 if/else if 语句。 我很好奇其他人是否可以使用范围来做到这一点。

//BIG PICTURE SOLUTION
//Step 1: Build a .plist or REST API service or whatever made up of different ways to describe "parts of the day" in different languages. 
//
//List of Language Codes: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
//Step 2: Get the user's local time zone
//Step 3: Calculate whether the user's local time fits within these buckets of time


import Foundation

class DayParts{
    var currentHour:Int
    var localLang:String?

    // IDEA: Build a .plist or a REST API service or whatever that simply returns a dictiontary
    let letterCodes:[String:Array<String>] = [
        "en": ["Early Morning", "Late Morning", "Early Afternoon", "Late Afternoon", "Evening", "Night"],
        "fr": ["Tôt le matin", "Tard dans la matinée", "Début d'après-midi", "Tard dans l'après-midi", "Soir", "Nuit"],
        "es": ["Mañana Temprano", "Mañana tarde", "Temprano en la tarde", "Fin de la tarde", "Anochecer", "Noche"]
    ]

    init(){
        //A. Get the current time
        let date = NSDate()
        let dateFormatter = NSDateFormatter()
            dateFormatter.dateFormat = "HH"
        //B. Get the current hour
        currentHour = Int(dateFormatter.stringFromDate(date))!
        //C. Get the current phone language
        localLang = NSLocale.currentLocale().objectForKey(NSLocaleLanguageCode) as? String
    }

    func now() -> String {
        if(currentHour < 08){
            return letterCodes[localLang!]![0]
        }
        else if(currentHour < 11){
            return letterCodes[localLang!]![1]
        }
        else if( currentHour < 15){
            return letterCodes[localLang!]![2]
        }
        else if( currentHour < 17){
            return letterCodes[localLang!]![3]
        }
        else if(currentHour < 21){
            return letterCodes[localLang!]![4]
        }
        else{
            return "Night"
        }
    }
}

let dayParts = DayParts().now()

Answer 3

不幸的是，没有内置的解决方案——NSDateFormatter 的相对格式仅适用于每天。

使用 Calendar.current.component(.hour, from: Date()) 获取小时并使用范围开关和 NSLocalizedString() 本地化字符串。

例如：

// let hour = NSCalendar.currentCalendar().component(.Hour, fromDate: NSDate()) Swift 2 legacy
let hour = Calendar.current.component(.hour, from: Date())

switch hour {
case 6..<12 : print(NSLocalizedString("Morning", comment: "Morning"))
case 12 : print(NSLocalizedString("Noon", comment: "Noon"))
case 13..<17 : print(NSLocalizedString("Afternoon", comment: "Afternoon"))
case 17..<22 : print(NSLocalizedString("Evening", comment: "Evening"))
default: print(NSLocalizedString("Night", comment: "Night"))
}

创建一个文件localizable.strings并添加您需要的本地化。

格式化一天中的时间 Swift Morning/Afternoon/Evening/Any 时间

Formatting time of the day Swift Morning/Afternoon/Evening/Any time

nsdateformatter

swift

充其量，您可以对您的约会对象执行此操作：