将字符串的分钟数秒转换为整数

Posted 2023-01-29

我有一个带有分钟和秒的字符串，格式为“分钟：秒”。例如，“ 5:36”。我想将其转换为Int值。例如，“ 5:36”字符串应为336 Int值。如何做到这一点？

答案

这是您可以使用的简单扩展名，它也将验证您输入字符串的格式：

import Foundation

extension String 

    func toSeconds() -> Int? 

        let elements = components(separatedBy: ":")

        guard elements.count == 2 else 
            print("Provided string doesn't have two sides separated by a ':'")
            return nil
        

        guard let minutes = Int(elements[0]),
        let seconds = Int(elements[1]) else 
           print("Either the minute value or the seconds value cannot be converted to an Int")
            return nil
        

        return (minutes*60) + seconds

    

用法：

let testString1 = "5:36"
let testString2 = "35:36"

print(testString1.toSeconds()) // prints: "Optional(336)"
print(testString2.toSeconds()) // prints: "Optional(2136)"

另一答案

let timeString = "5:36"
let timeStringArray = timeString.split(separator: ":")
let minutesInt = Int(timeStringArray[0]) ?? 0
let secondsInt = Int(timeStringArray[1]) ?? 0
let resultInt = minutesInt * 60 + secondsInt
print(resultInt)

另一答案

我在操场上尝试了您的示例，代码如下：

import Foundation

let time1String = "0:00"
let time2String = "5:36"

let timeformatter        = DateFormatter()
timeformatter.dateFormat = "m:ss"

let time1 = timeformatter.date(from: time1String)
let time2 = timeformatter.date(from: time2String)

if let time1 = time1 
    print(time2?.timeIntervalSince(time1)) // prints: Optional(336.0)