带有分钟和秒的日期选择器 [英] Date picker with minutes and seconds

问题描述

我对Swift还是陌生的，而对编程又是相当陌生的。我正在制作一个基本的倒数计时器应用，并希望使用日期选择器选择倒数的持续时间。我有一个标签，它是一个timeMin变量和一个timeSec变量的串联，以：字符串分隔。

I'm new to Swift and fairly new to programming in general. I'm making a basic countdown timer app and want to use a date picker to select the duration of the countdown. I have a label which is a concatenation of a timeMin variable and a timeSec variable, seperated by a ":" string.

当日期选择器的模式设置为倒数计时器时，它只能做几个小时和几分钟。有什么办法可以将其更改为分钟和几秒钟？日期选择器上显示的文本也应该是分钟和秒，而不是小时和分钟。

When the date picker's mode is set to countdown timer, it can only do hours and minutes. Is there any way I could change this to minutes and seconds? The text displayed on the date picker should be minutes and seconds too, rather than hours and minutes.

因此，如果我的标签从02:00开始，请使用日期选择器并选择4分（分钟）和35分（秒）应该只会导致标签更改为04:35。

So if my label starts off as 02:00, using the date picker and selecting 4 in minutes and 35 in seconds should simply result in the label changing to 04:35.

感谢您抽出宝贵的时间来提供帮助。

Thanks for taking the time to help.

推荐答案

使用 UIDatePicker 是不可能的，如果要实现此功能，则必须使用 UIPickerView 创建自定义日期选择器。您必须在 UIPickerView 中使用2个组件，一个组件用于分钟，一个组件用于秒。并从 UIPickerViewDatasource 的 titleForRow：... 方法提供值（具有适当的间隔）。

This is not possible with UIDatePicker, If you want to implement this, then you have to create custom datepicker by using UIPickerView. You have to take 2 components in UIPickerView, one for minutes and one for seconds. And supply the values(with appropriate interval) from titleForRow: ... method of UIPickerViewDatasource.

这篇关于带有分钟和秒的日期选择器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！