如何在Swift中使用UILocalNotification [英] How To Use UILocalNotification In Swift

问题描述

我试图弄清楚如何快速设置UILocalNotification，但是运气不佳.我正在尝试:

I am trying to figure out how to setup a UILocalNotification in swift but I am not having a lot of luck. I am trying this:

var notification = UILocalNotification()
notification.timeZone = NSTimeZone.defaultTimeZone()
var dateTime = NSDate.date()
notification.fireDate(dateTime)
notification.alertBody("Test")
UIApplication.sharedApplication().scheduleLocalNotification(notification)

对于初学者来说，我不确定这是否是获取当前日期时间的正确方法.在.Net中，我只执行DateTime.Now().

For starters, I am not sure if this is the proper way to get the current date time. In .Net, I would just do DateTime.Now().

第二，当我尝试此操作时，出现一个错误，内容为:

Second, when I try this, I get an error that says:

'(@ lvalue NSDate！)-> $ T3'与'NSDate'不相同

'(@lvalue NSDate!) -> $T3' is not identical to 'NSDate'

不幸的是，我不知道这意味着什么或如何进行.

Unfortunately I have no idea what this means or how to proceed.

推荐答案

首先，您使用初始化器语法构造NSDate:

First, you construct an NSDate using initializer syntax:

let dateTime = NSDate()

文档显示了ObjC便利构造函数如何映射到Swift初始化程序.如果文档显示某个类的init()，则使用该类的名称进行调用:对于NSDate，init()表示您调用NSDate()，init(timeInterval:sinceDate:)表示您调用NSDate(timeInterval: x, sinceDate: y)，依此类推.

The documentation shows how ObjC convenience constructors map to Swift initializers. If the docs show an init() for a class, you call it using the name of the class: for NSDate, init() means you call NSDate(), init(timeInterval:sinceDate:) means you call NSDate(timeInterval: x, sinceDate: y), etc.

第二个: fireDate 不是方法，而是属性.您应该分配给它而不是尝试调用它:

Second: fireDate isn't a method, it's a property. You should assign to it instead of trying to call it:

notification.fireDate = dateTime

alertBody的同上.

您还可以通过在您的Swift源文件中单击一个类名(或其他API符号)来找到Cocoa API的Swift语法.这会导致Xcode生成相关头文件的"Swift化"版本.

You can also find the Swift syntax for Cocoa APIs by command-clicking a class name (or other API symbol) in your Swift source file; this causes Xcode to generate a "Swift-ified" version of the relevant header file.

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