在 ios Swift 中比较时间

Question

我得到两个这种格式的日期字符串，“08:00:00”来自服务器端作为开始槽或结束槽。我必须获取本地时区的时间，然后检查当前时间是否位于来自服务器的时间间隔之间。 但我无法进行比较。

func checkTime() -> Bool {


            let dateFormatter: DateFormatter = DateFormatter()
            dateFormatter.dateFormat = "HH:mm:ss"
        dateFormatter.timeZone = TimeZone(identifier: "PKT")


            let startingSlot = self.selectedArea.startingSlot! //UTC
            let endingSlot = self.selectedArea.endingSlot! //UTC
            let date = Date().description(with: Locale.current)
            let current = date.split(separator: " ")
        let currentD:String = String(current[5])

            let date1: Date = dateFormatter.date(from: startingSlot)!
            let date2: Date = dateFormatter.date(from: endingSlot)!
        let currentdate:Date = dateFormatter.date(from: currentD)!

            print(date1)
            print(date2)
            print(current)

            if(currentdate >= date1 && currentdate <= date2) {
                return true
            } else {
                return false
            }
        }

如果当前日期时间在 date1 和 date2 之间，我希望得到 true。

Answer 1

通过忽略日期部分来比较时间 -

func checkTime() -> Bool {

let dateFormatter: DateFormatter = DateFormatter()
dateFormatter.timeZone = TimeZone(abbreviation: "PKT")
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"

let startingSlot = "2000-01-01 08:00:00" //UTC
let endingSlot = "2000-01-01 23:00:00" //UTC

let date = Date()

let date1: Date = dateFormatter.date(from: startingSlot)!
let date2: Date = dateFormatter.date(from: endingSlot)!

let currentTime = 60*Calendar.current.component(.hour, from: date) + Calendar.current.component(.minute, from: date) + (Calendar.current.component(.second, from: date)/60) // in minutes
let time1 = 60*Calendar.current.component(.hour, from: date1) + Calendar.current.component(.minute, from: date1) + (Calendar.current.component(.second, from: date1)/60) // in minutes
let time2 =  60*Calendar.current.component(.hour, from: date2) + Calendar.current.component(.minute, from: date2) + (Calendar.current.component(.second, from: date1)/60) // in minutes

print(currentTime)
print(time1)
print(time2)

if(currentTime >= time1 && currentTime <= time2) {
    return true
} else {
    return false
}

}

输出-

1121
510
1410
真的