如何在 Swift 中为日期选择器设置特定的默认时间 [英] How to set a specific default time for a date picker in Swift

问题描述

有没有办法设置日期选择器来显示特定的加载时间?我使用 GitHub 中弹出的 UIAlertView 中的 squimer/datePickerDialog 子类从开始时间、结束时间、开始日期和结束日期的四个文本字段启动了四个日期选择器实例.

Is there any way to set a date picker to display a specific time on load? I have four date picker instances initiated from four text fields for Start Time, Finish Time, Start Date and Finish Date using the squimer/datePickerDialog subclass from GitHub that pops up in a UIAlertView.

在我的应用中，默认开始时间是早上 7:00，默认结束时间是下午 5:00，让用户根据这些时间进行调整.

In my app a default start time would be 7:00 AM and a default finish time would be 5:00 PM and let the user adjust around those times.

我能看到的是，您可以将 datePicker.defaultDate 设置为 currentDate、minimumDate 或 maximumDate，并且只能设置一次.是否可以在我从 ViewController 的调用中将 defaultDate 设置为 sTime = "07:00" 和 fTime = "17:00" 的硬编码字符串?

All I can see is that you can set the datePicker.defaultDate to currentDate, minimumDate or maximumDate and only once. Is it possible set the defaultDate to hardcoded strings of sTime = "07:00" and fTime = "17:00" in my calls from the ViewController?

任何帮助将不胜感激.

这就是我从 viewController 调用子类的方式

This is how I am calling the subclass from my viewController

@IBAction func setFT(sender: UITextField) {
    resignKeyboardCompletely(sender)
    DatePickerDialog().show("Pick a Finish Time", doneButtonTitle: "Done", cancelButtonTitle: "Cancel", datePickerMode: .Time) {
        (timeFinish) -> Void in
        self.dateFormatter.dateFormat = "HH:mm"
        let finTime = self.dateFormatter.stringFromDate(timeFinish)
        self.finishTime.text = finTime
    }
    defaults.setObject(finishTime.text, forKey: "finishTime")
    print(finishTime.text)
}

请注意，在整个过程中，我也试图通过 NSUser Defaults 来保持持久性.

Note that throughout this I am also trying to maintain persistence through NSUser Defaults.

推荐答案

您是否正在寻找通过字符串设置时间.如果是这种情况，您可以使用这样的日期格式化程序.

Are you looking for setting the time through a string. If that''s the case you can use a date formatter like this.

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat =  "HH:mm"

let date = dateFormatter.dateFromString("17:00")

datePicker.date = date

向 Picker 类

init(time:String) {
    super.init(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.size.width, UIScreen.mainScreen().bounds.size.height))

    setupView()
    let dateFormatter = NSDateFormatter()
    dateFormatter.dateFormat =  "HH:mm"

    if let date = dateFormatter.dateFromString("17:00") {
        datePicker.date = date
    }
}

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