如何创建本地通知？

我如何设置本地通知，以便在我设置时，我的应用程序生成一个通知/警报与自定义的消息？

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小开

在 appregiate.m 文件中，在 applicationDidEnterBack 中编写以下代码以获取本地通知

- (void)applicationDidEnterBackground:(UIApplication *)application
{
UILocalNotification *notification = [[UILocalNotification alloc]init];
notification.repeatInterval = NSDayCalendarUnit;
[notification setAlertBody:@"Hello world"];
[notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:1]];
[notification setTimeZone:[NSTimeZone  defaultTimeZone]];
[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification]];
}
小开

下面是在我的项目中使用的 本地通知的示例代码。

目标 C:

AppDelegate文件中的这个代码块:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[launchOptions valueForKey:UIApplicationLaunchOptionsLocalNotificationKey];
// Override point for customization after application launch.
return YES;
}


// This code block is invoked when application is in foreground (active-mode)
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {


UIAlertView *notificationAlert = [[UIAlertView alloc] initWithTitle:@"Notification"    message:@"This local notification"
delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];


[notificationAlert show];
// NSLog(@"didReceiveLocalNotification");
}

此代码块在任何 ViewController的.m 文件中:

-(IBAction)startLocalNotification {  // Bind this method to UIButton action
NSLog(@"startLocalNotification");


UILocalNotification *notification = [[UILocalNotification alloc] init];
notification.fireDate = [NSDate dateWithTimeIntervalSinceNow:7];
notification.alertBody = @"This is local notification!";
notification.timeZone = [NSTimeZone defaultTimeZone];
notification.soundName = UILocalNotificationDefaultSoundName;
notification.applicationIconBadgeNumber = 10;


[[UIApplication sharedApplication] scheduleLocalNotification:notification];
}

The above code display an AlertView after time interval of 7 seconds when pressed on button that binds startLocalNotification If application is in background then it displays BadgeNumber as 10 and with default notification sound.

这段代码对于 iOS 7.x 及以下版本可以正常工作，但是对于控制台上的 IOS8会出现以下错误:

Attempting to schedule a local notification with an alert but haven't received permission from the user to display alerts

这意味着您需要注册本地通知:

if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)]){


[application registerUserNotificationSettings [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];
}

还可以引用 博客获取本地通知。

斯威夫特:

你的 AppDelegate.swift文件应该是这样的:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: UIUserNotificationType.Sound | UIUserNotificationType.Badge | UIUserNotificationType.Alert, categories: nil))


return true
}

您要在其中创建本地通知的快速文件(比如 ViewController.swift)应该包含以下代码:

//MARK: - Button functions
func buttonIsPressed(sender: UIButton) {
println("buttonIsPressed function called \(UIButton.description())")


var localNotification = UILocalNotification()
localNotification.fireDate = NSDate(timeIntervalSinceNow: 3)
localNotification.alertBody = "This is local notification from Swift 2.0"
localNotification.timeZone = NSTimeZone.localTimeZone()
localNotification.repeatInterval = NSCalendarUnit.CalendarUnitMinute
localNotification.userInfo = ["Important":"Data"];
localNotification.soundName = UILocalNotificationDefaultSoundName
localNotification.applicationIconBadgeNumber = 5
localNotification.category = "Message"


UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
}




//MARK: - viewDidLoad


class ViewController: UIViewController {


var objButton : UIButton!
. . .


override func viewDidLoad() {
super.viewDidLoad()


. . .


objButton = UIButton.buttonWithType(.Custom) as? UIButton
objButton.frame = CGRectMake(30, 100, 150, 40)
objButton.setTitle("Click Me", forState: .Normal)
objButton.setTitle("Button pressed", forState: .Highlighted)


objButton.addTarget(self, action: "buttonIsPressed:", forControlEvents: .TouchDown)


. . .
}


. . .
}

在 iOS9及以下版本中使用本地通知的方式在 iOS10中是完全不同的。

下面的屏幕截图来自苹果的发布说明。

Screenshot

可以引用 apple reference document获取 UserNotification。

下面是本地通知的代码:

目标 C:

  1. 在 App-delegate.h文件中使用 @import UserNotifications;

  2. 应用程序委托应符合 UNUserNotificationCenterDelegate协议

  3. 在 didFinishLaunchingOptions中使用以下代码:

    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
[center requestAuthorizationWithOptions:(UNAuthorizationOptionBadge | UNAuthorizationOptionSound | UNAuthorizationOptionAlert)
completionHandler:^(BOOL granted, NSError * _Nullable error) {
if (!error) {
NSLog(@"request authorization succeeded!");
[self showAlert];
}
}];


-(void)showAlert {
UIAlertController *objAlertController = [UIAlertController alertControllerWithTitle:@"Alert" message:@"show an alert!" preferredStyle:UIAlertControllerStyleAlert];


UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"OK"
style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
NSLog(@"Ok clicked!");
}];


[objAlertController addAction:cancelAction];




[[[[[UIApplication sharedApplication] windows] objectAtIndex:0] rootViewController] presentViewController:objAlertController animated:YES completion:^{
}];


}

  4. Now create a button in any view controller and in IBAction use below code :

    UNMutableNotificationContent *objNotificationContent = [[UNMutableNotificationContent alloc] init];


objNotificationContent.title = [NSString localizedUserNotificationStringForKey:@“Notification!” arguments:nil];


objNotificationContent.body = [NSString localizedUserNotificationStringForKey:@“This is local notification message!“arguments:nil];


objNotificationContent.sound = [UNNotificationSound defaultSound];


// 4. update application icon badge number
objNotificationContent.badge = @([[UIApplication sharedApplication] applicationIconBadgeNumber] + 1);


// Deliver the notification in five seconds.
UNTimeIntervalNotificationTrigger *trigger =  [UNTimeIntervalNotificationTrigger                                             triggerWithTimeInterval:10.f repeats:NO];


UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@“ten”                                                                            content:objNotificationContent trigger:trigger];


// 3. schedule localNotification
UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];


[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
if (!error) {
NSLog(@“Local Notification succeeded“);
} else {
NSLog(@“Local Notification failed“);
}
}];

Swift 3:

  1. In AppDelegate.swift file use import UserNotifications
  2. Appdelegate should conform to UNUserNotificationCenterDelegate protocol

  3. In didFinishLaunchingWithOptions use below code 

    // Override point for customization after application launch.
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
// Enable or disable features based on authorization.
if error != nil {
print("Request authorization failed!")
} else {
print("Request authorization succeeded!")
self.showAlert()
}
}




func showAlert() {
let objAlert = UIAlertController(title: "Alert", message: "Request authorization succeeded", preferredStyle: UIAlertControllerStyle.alert)


objAlert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
//self.presentViewController(objAlert, animated: true, completion: nil)


UIApplication.shared().keyWindow?.rootViewController?.present(objAlert, animated: true, completion: nil)
}

  4. Now create a button in any view controller and in IBAction use below code :

    let content = UNMutableNotificationContent()
content.title = NSString.localizedUserNotificationString(forKey: "Hello!", arguments: nil)
content.body = NSString.localizedUserNotificationString(forKey: "Hello_message_body", arguments: nil)
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "notify-test"


let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 5, repeats: false)
let request = UNNotificationRequest.init(identifier: "notify-test", content: content, trigger: trigger)


let center = UNUserNotificationCenter.current()
center.add(request)
小开 
-(void)kundanselect
{
NSMutableArray *allControllers = [[NSMutableArray alloc] initWithArray:self.navigationController.viewControllers];
NSArray *allControllersCopy = [allControllers copy];
if ([[allControllersCopy lastObject] isKindOfClass: [kundanViewController class]])
{
[[NSNotificationCenter defaultCenter]postNotificationName:@"kundanViewControllerHide"object:nil userInfo:nil];
}
else
{
[[NSUserDefaults standardUserDefaults] setInteger:4 forKey:@"selected"];
[self performSegueWithIdentifier:@"kundansegue" sender:self];
}
}

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(ApparelsViewControllerHide) name:@"ApparelsViewControllerHide" object:nil];

小开 
- (void)applicationDidEnterBackground:(UIApplication *)application
{
UILocalNotification *notification = [[UILocalNotification alloc]init];
notification.repeatInterval = NSDayCalendarUnit;
[notification setAlertBody:@"Hello world"];
[notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:1]];
[notification setTimeZone:[NSTimeZone  defaultTimeZone]];
[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification]];
}

这是工作，而是在 iOS 8.0及更高版本中，您的应用程序必须注册用户通知使用 -[UIApplication registerUserNotificationSettings:]之前，能够安排和显示 UILocalNotification，不要忘记这一点。

小开

iOS 8 users and above, please include this in App delegate to make it work.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
if ([UIApplication instancesRespondToSelector:@selector(registerUserNotificationSettings:)])
{
[application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];
}


return YES;
}

然后添加这些代码行会有所帮助,

- (void)applicationDidEnterBackground:(UIApplication *)application
{
UILocalNotification *notification = [[UILocalNotification alloc]init];
notification.repeatInterval = NSDayCalendarUnit;
[notification setAlertBody:@"Hello world"];
[notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:1]];
[notification setTimeZone:[NSTimeZone  defaultTimeZone]];
[application setScheduledLocalNotifications:[NSArray arrayWithObject:notification]];


}
小开

创建本地通知非常简单。

  1. 在 viewDidLoad ()函数中，请求用户允许应用程序显示通知。为此，我们可以使用以下代码。

    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge], completionHandler: {didAllow, error in
})

  2. Then you can create a button, and then in the action function you can write the following code to display a notification. 

    //creating the notification content
let content = UNMutableNotificationContent()


//adding title, subtitle, body and badge
content.title = "Hey this is Simplified iOS"
content.subtitle = "iOS Development is fun"
content.body = "We are learning about iOS Local Notification"
content.badge = 1


//getting the notification trigger
//it will be called after 5 seconds
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)


//getting the notification request
let request = UNNotificationRequest(identifier: "SimplifiedIOSNotification", content: content, trigger: trigger)


//adding the notification to notification center
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

  3. Notification will be displayed, just click on home button after tapping the notification button. As when the application is in foreground the notification is not displayed. But if you are using iPhone X. You can display notification even when the app is in foreground. For this you just need to add a delegate called UNUserNotificationCenterDelegate

For more details visit this blog post: iOS Local Notification Tutorial

小开

更新与 Swift 5一般我们使用三种类型的本地通知

  1. 简单本地通知
  2. 本地通知及行动
  3. 含内容的本地通知

您可以在其中发送简单的文本通知或动作按钮和附件。

Using UserNotifications package in your app, the following example 请求通知权限，根据用户操作 AppCommittee 本身准备和发送通知，并使用视图控制器列出不同类型的本地通知测试。

应用代理

import UIKit
import UserNotifications


@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {


let notificationCenter = UNUserNotificationCenter.current()
var window: UIWindow?




func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {


//Confirm Delegete and request for permission
notificationCenter.delegate = self
let options: UNAuthorizationOptions = [.alert, .sound, .badge]
notificationCenter.requestAuthorization(options: options) {
(didAllow, error) in
if !didAllow {
print("User has declined notifications")
}
}


return true
}


func applicationWillResignActive(_ application: UIApplication) {
}
func applicationDidEnterBackground(_ application: UIApplication) {
}
func applicationWillEnterForeground(_ application: UIApplication) {
}
func applicationWillTerminate(_ application: UIApplication) {
}
func applicationDidBecomeActive(_ application: UIApplication) {
UIApplication.shared.applicationIconBadgeNumber = 0
}




//MARK: Local Notification Methods Starts here


//Prepare New Notificaion with deatils and trigger
func scheduleNotification(notificationType: String) {


//Compose New Notificaion
let content = UNMutableNotificationContent()
let categoryIdentifire = "Delete Notification Type"
content.sound = UNNotificationSound.default
content.body = "This is example how to send " + notificationType
content.badge = 1
content.categoryIdentifier = categoryIdentifire


//Add attachment for Notification with more content
if (notificationType == "Local Notification with Content")
{
let imageName = "Apple"
guard let imageURL = Bundle.main.url(forResource: imageName, withExtension: "png") else { return }
let attachment = try! UNNotificationAttachment(identifier: imageName, url: imageURL, options: .none)
content.attachments = [attachment]
}


let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)
let identifier = "Local Notification"
let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)


notificationCenter.add(request) { (error) in
if let error = error {
print("Error \(error.localizedDescription)")
}
}


//Add Action button the Notification
if (notificationType == "Local Notification with Action")
{
let snoozeAction = UNNotificationAction(identifier: "Snooze", title: "Snooze", options: [])
let deleteAction = UNNotificationAction(identifier: "DeleteAction", title: "Delete", options: [.destructive])
let category = UNNotificationCategory(identifier: categoryIdentifire,
actions: [snoozeAction, deleteAction],
intentIdentifiers: [],
options: [])
notificationCenter.setNotificationCategories([category])
}
}


//Handle Notification Center Delegate methods
func userNotificationCenter(_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .sound])
}


func userNotificationCenter(_ center: UNUserNotificationCenter,
didReceive response: UNNotificationResponse,
withCompletionHandler completionHandler: @escaping () -> Void) {
if response.notification.request.identifier == "Local Notification" {
print("Handling notifications with the Local Notification Identifier")
}
completionHandler()
}
}

和 ViewController

import UIKit


class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {


var appDelegate = UIApplication.shared.delegate as? AppDelegate
let notifications = ["Simple Local Notification",
"Local Notification with Action",
"Local Notification with Content",]


override func viewDidLoad() {
super.viewDidLoad()
}


// MARK: - Table view data source


func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return notifications.count
}


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = notifications[indexPath.row]
return cell
}


func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let notificationType = notifications[indexPath.row]
let alert = UIAlertController(title: "",
message: "After 5 seconds " + notificationType + " will appear",
preferredStyle: .alert)
let okAction = UIAlertAction(title: "Okay, I will wait", style: .default) { (action) in
self.appDelegate?.scheduleNotification(notificationType: notificationType)
}
alert.addAction(okAction)
present(alert, animated: true, completion: nil)
}
}
小开

我假设您已经申请了授权并注册了您的应用程序以获得通知。

下面是创建本地通知的代码

@available(iOS 10.0, *)
func send_Noti()
{
//Create content for your notification
let content = UNMutableNotificationContent()
content.title = "Test"
content.body = "This is to test triggering of notification"


//Use it to define trigger condition
var date = DateComponents()
date.calendar = Calendar.current
date.weekday = 5 //5 means Friday
date.hour = 14 //Hour of the day
date.minute = 10 //Minute at which it should be sent




let trigger = UNCalendarNotificationTrigger(dateMatching: date, repeats: true)
let uuid = UUID().uuidString
let req = UNNotificationRequest(identifier: uuid, content: content, trigger: trigger)


let notificationCenter = UNUserNotificationCenter.current()
notificationCenter.add(req) { (error) in
print(error)
}
}

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