Question

我有两个字符串，date和time。 date字符串的日期格式为“ MM-dd-yyyy”，时间格式为“ hh：mm a”，我想从中创建一个10位的时间戳。我做了以下工作，但与此同时遇到了问题。任何帮助表示赞赏。

let idate = (userInstance.userData?.Date!)! + "T" + (userInstance.userData?.Time!)!  + "+0000"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
dateFormatter.locale = Locale(identifier: "en_US_POSIX")
let date = dateFormatter.date(from: idate)!
print(date)

let timestamp = Int(date.timeIntervalSince1970)
print(timestamp)

Answer 1

您不能将包含AM / PM时间的日期强制设置为ISO8601。ISO8601日期始终以24小时模式表示。
除了您的年，月和日订单不符合ISO 8601。

指定适当的日期格式using System; using Xamarin.Forms; using SlideOverKit.MoreSample; using SlideOverKit.MoreSample.iOS; using Xamarin.Forms.Platform.iOS; using menutest.iOS; using UIKit; using CoreGraphics; [assembly: ExportRenderer (typeof(MainPage), typeof(PageImpInterfaceRendereiOS))] namespace menutest.iOS { // As your page cannot inherit from MenuContainerPage, // You must create a renderer page, copy these codes and rename. public class PageImpInterfaceRendereiOS : PageRenderer, ISlideOverKitPageRendereriOS { public Action<bool> ViewDidAppearEvent { get; set; } public Action<VisualElementChangedEventArgs> OnElementChangedEvent { get; set; } public Action ViewDidLayoutSubviewsEvent { get; set; } public Action<bool> ViewDidDisappearEvent { get; set; } public Action<CGSize, IUIViewControllerTransitionCoordinator> ViewWillTransitionToSizeEvent { get; set; } public PageImpInterfaceRendereiOS () { new SlideOverKitiOSHandler ().Init (this); } protected override void OnElementChanged (VisualElementChangedEventArgs e) { base.OnElementChanged (e); if (OnElementChangedEvent != null) OnElementChangedEvent (e); } public override void ViewDidLayoutSubviews () { base.ViewDidLayoutSubviews (); if (ViewDidLayoutSubviewsEvent != null) ViewDidLayoutSubviewsEvent (); } public override void ViewDidAppear (bool animated) { base.ViewDidAppear (animated); if (ViewDidAppearEvent != null) ViewDidAppearEvent (animated); } public override void ViewDidDisappear (bool animated) { base.ViewDidDisappear (animated); if (ViewDidDisappearEvent != null) ViewDidDisappearEvent (animated); } public override void ViewWillTransitionToSize (CGSize toSize, IUIViewControllerTransitionCoordinator coordinator) { base.ViewWillTransitionToSize (toSize, coordinator); if (ViewWillTransitionToSizeEvent != null) ViewWillTransitionToSizeEvent (toSize, coordinator); } } }

MM-dd-yyyyhh:mm aZ

Answer 2

您在这里坠毁：

let date = dateFormatter.date(from: idate)!

那是因为您声称idate是这种格式的字符串：

"yyyy-MM-dd'T'HH:mm:ssZ"

但不是。从字符串转换为日期时，格式字符串必须完全与字符串格式匹配。

然后，您可以提供其他格式，并将日期转换为新的字符串。

字符串发出的时间戳记？

2 个答案: