【Swift】Date型とString型の型変換

import UIKit

class DateUtils {
    class func dateToString(dateString: Date, format: String) -> String? {
        let formatter: DateFormatter = DateFormatter()
        formatter.calendar = Calendar(identifier: .gregorian)
        formatter.dateFormat = format
        return formatter.string(from: dateString)
    }

    class func stringToDate(dateString: String, fromFormat: String) -> Date? {
        let formatter = DateFormatter()
        formatter.locale = .current
        formatter.dateFormat = fromFormat
        return formatter.date(from: dateString)
    }
}


let dateString = "2022-04-15 11:00:00 +0000"

// String→Dateに変換
let date1 = DateUtils.stringToDate(dateString: dateString, fromFormat: "yyyy-MM-dd HH:mm:ss Z")!
// →2022-04-15 11:00:00 +0000


// Date→Stringに変換
let date2 = DateUtils.dateToString(dateString: date1, format: "yyyy年MM月dd日")!
// →2022年04月15日