获取给定一天中每分钟数组的最有效方法是什么?

请注意,并非每天都有24小时。它也可能有23或25个。关于最有效的方法,我认为使用DateComponentes日期属性比添加分钟或获取日期后的下一个日期要快得多:

extension Date {
    func year(using calendar: Calendar = .current) ->  Int {
        calendar.component(.year, from: self)
    }
    func month(using calendar: Calendar = .current) ->  Int {
        calendar.component(.month, from: self)
    }
    func day(using calendar: Calendar = .current) ->  Int {
        calendar.component(.day, from: self)
    }
    func noon(using calendar: Calendar = .current) -> Date  {
        calendar.date(bySettingHour: 12, minute: 0, second: 0, of: self)!
    }
    func startOfDay(using calendar: Calendar = .current) -> Date {
        calendar.startOfDay(for: self)
    }
    func dayAfter(using calendar: Calendar = .current) -> Date {
        calendar.date(byAdding: .day, value: 1, to: noon(using: calendar))!
    }
    func startOfNextDay(using calendar: Calendar = .current) -> Date {
        calendar.startOfDay(for: dayAfter(using: calendar))
    }
}

let calendar = Calendar.current
let date = Date()
let startOfDay = date.startOfDay(using: calendar)
let startOfNextDay = startOfDay.startOfNextDay(using: calendar)
let minutes = calendar.dateComponents([.minute], from: startOfDay, to: startOfNextDay).minute!
let year = date.year(using: calendar)
let month = date.month(using: calendar)
let day = date.day(using: calendar)

let dates = (0..<minutes).compactMap {
    DateComponents(calendar: calendar, year: year, month: month, day: day, minute: $0).date
}
print("minutes count:", dates.count)  // "minutes count: 1440\n"

for minute in dates {
    print("minute = \(minute)")
}