ios - 想要获取时间数组

Question

我正在尝试获取时间数组，其中时间将从当前时间 + 1 小时开始，之后到下午 5 点，它将显示 30-30 分钟的时间差。

func getTimeArray(){
    let date = Date()
    var dateComponents = DateComponents()
    let timeFormatter = DateFormatter()

    let calendar = Calendar.current
    var components = calendar.dateComponents([.hour , .minute], from: date)

    dateComponents.hour = components.hour
    dateComponents.minute = components.minute
    timeFormatter.dateFormat = "h:mm a"

    guard let startTime = calendar.date(from: dateComponents) else {
        return }
    for i in 0 ... 10 {
        guard let  newDate = calendar.date(byAdding: .minute , value: i + 30, to: startTime) else {return}
        timeArray.append(timeFormatter.string(from: newDate).localizedUppercase)
        print(timeArray)
    }

    print(timeArray)

}

结果是:- [“12:53 PM”、“12:54 PM”、“12:55 PM”、“12:56 PM”、“12:57 PM”、“12:58 PM” , "12:59 PM", "1:00 PM", "1:01 PM", "1:02 PM", "1:03 PM"]我需要:- ["12:30", "1:00", "1:30", "2:00"]

Answer 1

一种更结构化的方式来满足您的需求:

func getTimeArray(){
        var timeArray = [String]()
        let timeFormatter = DateFormatter()
        timeFormatter.dateFormat = "h:mm"

        for i in 0 ... 10 {
            guard let dt:Date = Calendar.current.date(byAdding: .minute, value: 30*i, to: Date()) else {return}
            timeArray.append(timeFormatter.string(from: dt).localizedUppercase)

        }
        print(timeArray)
    }