如何在Today扩展中发送和接收数据 [英] How to send and receive data in Today extensions

问题描述

我想开发一个iOS应用程序，它有一个Widget for notification center，但我不知道如何在View Controller和And Today Extension之间发送和接收数据（传递数据）。

I want to develop an app for iOS that have a Widget for notification center, but I don't know how I should send and receive data (pass data) between View Controller and And Today Extension.

我尝试使用结构，但它不起作用，我也使用了应用程序组，但我不想使用这种方法。

I tried to use structs, but it doesn't work, and also I used app groups but I don't want to use this method.

let shared = NSUserDefaults(suiteName: "group.Demo.Share-Extension-Demo.mahdi")
shared?.setObject("Hello", forKey: "kkk")

推荐答案

除了NSUserDefaults，您可以使用NSNotificationCenter在任何地方发送或接收数据。

Apart from NSUserDefaults, you can use the NSNotificationCenter to send or receive data anywhere.

您需要设置观察者，您可以在其中接收如下数据：

You need to set the observer where you can receive the data like below:

override func viewDidLoad() {
    super.viewDidLoad()

    NSNotificationCenter.defaultCenter().addObserver(self, selector: "dataReceived:", name: "SpecialKey", object: nil)    
}

Funciton捕获数据：

Funciton to catch data:

func dataReceived(notification: NSNotification) {
    //deal with notification.userInfo
    println(notification.userInfo)

    println("Received Data")
}

你需要从哪里定义NSNotificationCenter需要发送数据：

And you need to define NSNotificationCenter from where you need to send the data:

NSNotificationCenter.defaultCenter().postNotificationName("SpecialKey", object: nil, userInfo: ["MyData": "Demo"])

参考文献：

NSNotificationCenter的完整指南

希望有所帮助！

http://moreindirection.blogspot.in/2014/08/nsnotificationcenter-swift-and-blocks.html

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