Swift 下午返回时间为上午
Swift time being returned as am when it is pm
此函数获取当前时间并在数组中查找下一个时间。当前时间在中午之前,下一个时间在中午之后,returns下一个时间应该是下午。
我怎样才能改变这个?我需要使用 12 小时制而不是 24 小时制吗?
import UIKit
import Foundation
let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components([.Hour, .Minute], fromDate: date)
let hour = components.hour
let minutes = components.minute
let currentTime = "\(hour)" + ":" + "\(minutes)" //output 10:47
let timesArray = ["5:45", "6:35", "7:00", "7:30", "7:50", "8:20", "8:40", "9:15", "10:10",
"12:40", "14:15", "14:50", "15:40", "16:10", "17:10", "17:40", "18:40", "19:25", "20:50"]
// create a method to convert your time to minutes
func stringToMinutes(input:String) -> Int {
let components = input.componentsSeparatedByString(":")
let hour = Int((components.first ?? "0")) ?? 0
let minute = Int((components.last ?? "0")) ?? 0
return hour*60 + minute
}
//create an array with the minutes from the original array
let timesMinutesArray:[Int] = timesArray.map { stringToMinutes([=11=]) }
let dayMinute = stringToMinutes(currentTime)
// filter out the times that has already passed
let filteredTimesArray = timesMinutesArray.filter{[=11=] > dayMinute }
// get the first time in your array
if let firstTime = filteredTimesArray.first {
// find its position and extract it from the original array
let nextDeparture = timesArray[timesMinutesArray.indexOf(firstTime)!] // output "12:40"
let userCalendar = NSCalendar.currentCalendar()
let dateMakerFormatter = NSDateFormatter()
dateMakerFormatter.calendar = userCalendar
dateMakerFormatter.dateFormat = "yyyy/MM/dd"
// How many hours and minutes between current time and next departure?
dateMakerFormatter.dateFormat = "h:mm"
let startTime = dateMakerFormatter.dateFromString(currentTime)!
let endTime = dateMakerFormatter.dateFromString(nextDeparture)! //this comes back as 12:40 am not pm
let hourMinuteComponents: NSCalendarUnit = [.Hour, .Minute]
let timeDifference = userCalendar.components(
hourMinuteComponents,
fromDate: startTime,
toDate: endTime,
options: [])
let difference = (timeDifference.hour*60) + (timeDifference.minute)
}
在你的 dateFormat
:
中尝试大写 H
dateMakerFormatter.dateFormat = "H:mm"
此函数获取当前时间并在数组中查找下一个时间。当前时间在中午之前,下一个时间在中午之后,returns下一个时间应该是下午。 我怎样才能改变这个?我需要使用 12 小时制而不是 24 小时制吗?
import UIKit
import Foundation
let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components([.Hour, .Minute], fromDate: date)
let hour = components.hour
let minutes = components.minute
let currentTime = "\(hour)" + ":" + "\(minutes)" //output 10:47
let timesArray = ["5:45", "6:35", "7:00", "7:30", "7:50", "8:20", "8:40", "9:15", "10:10",
"12:40", "14:15", "14:50", "15:40", "16:10", "17:10", "17:40", "18:40", "19:25", "20:50"]
// create a method to convert your time to minutes
func stringToMinutes(input:String) -> Int {
let components = input.componentsSeparatedByString(":")
let hour = Int((components.first ?? "0")) ?? 0
let minute = Int((components.last ?? "0")) ?? 0
return hour*60 + minute
}
//create an array with the minutes from the original array
let timesMinutesArray:[Int] = timesArray.map { stringToMinutes([=11=]) }
let dayMinute = stringToMinutes(currentTime)
// filter out the times that has already passed
let filteredTimesArray = timesMinutesArray.filter{[=11=] > dayMinute }
// get the first time in your array
if let firstTime = filteredTimesArray.first {
// find its position and extract it from the original array
let nextDeparture = timesArray[timesMinutesArray.indexOf(firstTime)!] // output "12:40"
let userCalendar = NSCalendar.currentCalendar()
let dateMakerFormatter = NSDateFormatter()
dateMakerFormatter.calendar = userCalendar
dateMakerFormatter.dateFormat = "yyyy/MM/dd"
// How many hours and minutes between current time and next departure?
dateMakerFormatter.dateFormat = "h:mm"
let startTime = dateMakerFormatter.dateFromString(currentTime)!
let endTime = dateMakerFormatter.dateFromString(nextDeparture)! //this comes back as 12:40 am not pm
let hourMinuteComponents: NSCalendarUnit = [.Hour, .Minute]
let timeDifference = userCalendar.components(
hourMinuteComponents,
fromDate: startTime,
toDate: endTime,
options: [])
let difference = (timeDifference.hour*60) + (timeDifference.minute)
}
在你的 dateFormat
:
dateMakerFormatter.dateFormat = "H:mm"