iPhone开发 Swift - NSNotification 通知

Swift创建Notification通知

1. 创建一个SingleView Application
2. 打开AppDelegate.swift，在方法

application(application:UIApplication,didFinishLaunchingWithOptions launchOptions: NSDictionary?)

中输入代码：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {

//设置Notification 的类型

let types:UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Badge

//设置Notification的设置项，其中categories参数用来设置Notification的类别

let mySettings: UIUserNotificationSettings = UIUserNotificationSettings(forType: types, categories: nil);

//注册UserNotification

UIApplication.sharedApplication().registerUserNotifiationSettings(mySettings)

    return true

}

1. 配置不同的Actions，在方法

application(application:UIApplication,didFinishLaunchingWithOptions launchOptions: NSDictionary?)内的代码开始部分输入以下代码

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {

//define Actions

var firstAction: UIMutableUserNotificationAction = UIMutableUserNotificationAction();

// The unique identifier for this action

fistAction.identifier = “FIRST_ACTION”;

// The localized title to display for this action

firstAction.title = “First Action”;

//define action’s activationMode, // How the application should be activated in response to the action

firstAction.activationMode = UIUserNotificationActivationMode.Background// 当点击的时候不启动程序，在后台处理

//define action’s destructive // Whether this action should be indicated as destructive when displayed.

firstAction.destructive = true

//define authentication // Whether this action is secure and should require unlocking before being performed. If the activation mode is UIUserNotificationActivationModeForeground, then the action is considered secure and this property is ignored.

firstAction.authenticationRequired = false//不需要用户解锁手机即可以处理该Notification

 

var secondAction:UIMutableUserNotificationAction = UIMutableUserNotificationAction()

        secondAction.identifier = "SECOND_ACTION";

        secondAction.title = "Second Action";

        secondAction.activationMode = UIUserNotificationActivationMode.Foreground

        secondAction.destructive = false

        secondAction.authenticationRequired = false

 

var thirdAction:UIMutableUserNotificationAction = UIMutableUserNotificationAction()

        thirdAction.identifier = "THIRD_ACTION";

        thirdAction.title = "Third Action";

        thirdAction.activationMode = UIUserNotificationActivationMode.Background

        thirdAction.destructive = false

        thirdAction.authenticationRequired = false

 

//Category

        var firstCategory: UIMutableUserNotificationCategory = UIMutableUserNotificationCategory()

        firstCategory.identifier = "FIRST_CATEGORY";

 

let defaultActions:NSArray = [firstAction, secondAction, thirdAction];

        let minimalActions:NSArray = [firstAction, secondAction];

 

// Sets the UIUserNotificationActions in the order to be displayed for the specified context

firstCategory.setActions(defaultActions, forContext: UIUserNotificationActionContext.Default);// // the default context of a notification action

        firstCategory.setActions(minimalActions, forContext: UIUserNotificationActionContext.Minimal);//Minimal // the context of a notification action when space is limited

 

let categories: NSSet = NSSet(objects: firstCategory)

 

 

//设置Notification 的类型

let types:UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Badge

//设置Notification的设置项，其中categories参数用来设置Notification的类别

let mySettings: UIUserNotificationSettings = UIUserNotificationSettings(forType: types, categories: nil);

//注册UserNotification

UIApplication.sharedApplication().registerUserNotifiationSettings(mySettings)

    return true

}

 

4. 打开ViewController.swift文件，在ViewDidLoad方法中输入以下代码

override func viewDidLoad() {

   super.viewDidLoad()

    //define notification center

    NSNotificationCenter.defaultCenter().addObserver(self, selector: “TestShape:”, name: “actionOne”, object: nil)

NSNotificationCenter.defaultCenter().addObserver(self, selector:”TestMessage:”, name: “actionTwo”, object: nil)

//定义一个触发Notification的程序
var dateComp: NSDateComponents  = NSDateComponents()

dateComp.year = 2014

dateComp.month = 09

dateComp.day = 09

dateComp.hour = 11

dateComp.minute = 11

dateComp.timeZone = NSTimeZone.systemTimeZone()

 

var calendar: NSCalendar = NSCalendar(calendarIdentifier: NSGregorianCalendar)

var date: NSDate = calendar.dateFromComponents(dateComp)

 

 

//define Location notification

var notification: UILocalNotification = UILocalNotification()

notification.category = “FIRST_CATEGORY”;

notification.alertBody = “This is a notification”

notification.fireDate = date

 

//fire notification

UIApplication.shareApplication().scheduleLocalNotification(notification)

}

 

func TestShape(notification: NSNotification) {

UIView *view = UIView(frame: CGRectMake(100,100,100,100));

view.backgroundColor = UIColor.blackColor()

Self.view.addSubview(view)

}

 

func TestMessage(notification: NSNotification) {

    var message: UIAlertController = UIAlertController(title: “Notification Message”, message: “Hello, this is an alert message”, preferredStyle: UIAlertControllerStyle.Alert)

message.addAction(UIAlertAction(title: “OK”, style: UIAlertActionStyle.Default, handle: nil))

 

self.presentViewController(message, animated: true, completion: nil)

}

 

5. 回到AppDelegate.swift，并添加以下方法

func application(application: UIApplication!, handleActionWithIdentifier identifier: String!, forLocalNotification notification: UILocalNotification!, completionHandler: (() -> Void)!) {

    if identifier == “FIRST_ACTION” {

    NSNotificationCenter.defaultCenter().postNotificationName(“actionOne”, object: nil)

}

else if identifier == “SECOND_ACTION” {

    NSNotificationCenter.defaultCenter().postNotificationName(“actionTwo”, object: nil)

}

completionHandler()

}