如何在iPhone应用程序中创建本地通知

Question

我想知道我（作为开发人员）如何设置本地通知，以便在我设置的时候，我的应用程序会生成具有自定义消息的通知/提醒...

Answer 1

在appdelegate.m文件写入applicationDidEnterBackground的follwing代码来获取本地通知

- (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]]; 
} 

Answer 2

这里是LocalNotification，对于我的项目工作的示例代码。

目的-C：

在AppDelegate文件此代码块：

- (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"); 
    } 

在任何ViewController的.m文件此代码块：

-(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];  
} 

上面的代码显示在按下绑定的按钮时按7秒的时间间隔后的AlertView 0如果应用程序在后台，则它会将BadgeNumber显示为10，并显示默认通知声音。

此代码工作正常的iOS 7.x及以下但的iOS 8系统会提示在控制台下面的错误：

试图安排与警报本地通知，但还没有收到许可从用户到显示警报

这意味着您需要注册本地通知。这可以通过以下方式实现：

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

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

您也可以参考blog进行本地通知。

斯威夫特：

您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 
} 

雨燕文件（比如说ViewController.swift）要在其中创建本地通知应包含以下代码：

//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) 

     . . . 
    } 

    . . . 
} 

您使用的方式iOS 9及以下版本的本地通知在iOS 10中完全不同。

从Apple发行说明下方的屏幕抓取描述了这一点。

您可以参考apple reference document为UserNotification。

下面是本地通知代码：

目的-C：

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

2. 的App-代表应符合UNUserNotificationCenterDelegate协议

3. 在以下代码didFinishLaunchingOptions使用：

   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. 现在，在任何视图控制器创建一个按钮，并在IBAction为使用以下的代码：

   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“); 
       } 
   }]; 
   

夫特3：

1. 在AppDelegate.swift fil e，利用import UserNotifications
2. 的appDelegate应符合UNUserNotificationCenterDelegate协议

3. 在didFinishLaunchingWithOptions使用以下代码

   // 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. 现在，在任何视图控制器创建一个按钮，并在IBAction为使用以下的代码：

   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) 
   

Answer 3

-(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];

Answer 4

- (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，但在IOS 8.0及更高版本，您的应用程序必须能够安排和目前UILocalNotifications之前使用-[UIApplication registerUserNotificationSettings:]用户注册通知，不要忘记这一点。

Answer 5

iOS 8用户及以上，请包括在应用程序委托，使其工作。

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

    return YES; 
} 

，然后加入的代码，将有助于该行，

- (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]]; 

} 

Answer 6

创建本地通知是很容易的。只要按照这些步骤。

1. On viewDidLoad（）函数询问用户您的应用程序想要显示通知的权限。为此我们可以使用下面的代码。

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

2. 然后你就可以创建一个按钮，然后在操作功能，你可以写下面的代码显示通知。

   //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. 通知将显示，只需点击主页按钮后点击通知按钮。当应用程序处于前台时，不会显示通知。但是，如果您使用iPhone X.即使应用程序处于前景中，您也可以显示通知。对于这一点，你只需要添加一个名为UNUserNotificationCenterDelegate

欲了解更多详情，请访问该博客文章代表：iOS Local Notification Tutorial