如何在iOS中创建本地通知？-Java 学习之路

我想知道如何设置本地通知，以便在我设置时，我的应用程序生成带有自定义消息的通知/警报...

6 回答

以下是适用于我的项目的LocalNotification的示例代码 .

Objective-C:

AppDelegate 文件中的此代码块：

- (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");
    }

任何 ViewController 的.m文件中的此代码块：

-(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];    
}

上面的代码显示一个AlertView后7秒的时间间隔按下按钮时绑定 startLocalNotification 如果应用程序在后台，则它显示 BadgeNumber 为10并具有默认通知声音 .

此代码适用于iOS 7.x及更低版本，但对于iOS 8，它将在控制台上提示以下错误：

尝试使用警报安排本地通知，但尚未收到用户显示警报的权限

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 .

Swift:

你 AppDelegate.swift 文件应该如下所示：

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
}

要在其中创建本地通知的swift文件（例如 ViewController.swift ）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)

        . . .
    }

    . . .
}

The way you use to work with Local Notification in iOS 9 and below is completely different in iOS 10.

苹果发布说明下面的屏幕抓取描述了这一点 .

Screenshot

您可以参考apple reference document进行UserNotification .

以下是本地通知的代码：

Objective-C:

在 App-delegate.h 文件中使用 @import UserNotifications;
App-delegate应符合 UNUserNotificationCenterDelegate 协议
在 didFinishLaunchingOptions 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:^{            
    }];

}

现在在任何视图控制器中创建一个按钮，在IBAction中使用下面的代码：

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“);
    }
}];

Swift 3:

在 AppDelegate.swift 文件中使用 import UserNotifications
Appdelegate应符合 UNUserNotificationCenterDelegate 协议
在 didFinishLaunchingWithOptions 中使用以下代码

// 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)
}

现在在任何视图控制器中创建一个按钮，在IBAction中使用下面的代码：

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)

回复于 2024-04-28T00:38:23+08:00

在appdelegate.m文件中，在applicationDidEnterBackground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]];
}

回复于 2024-04-28T00:38:23+08:00

创建本地通知非常简单 . 只需按照以下步骤操作

在viewDidLoad（）函数中，询问用户是否允许您的应用显示通知 . 为此，我们可以使用以下代码 .

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

然后您可以创建一个按钮，然后在操作功能中，您可以编写以下代码来显示通知 .

//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)

将显示通知，点击通知按钮后点击主页按钮 . 当应用程序处于前台时，不会显示通知 . 但是，如果您使用的是iPhone X.即使应用程序位于前台，您也可以显示通知 . 为此你只需要添加一个名为 UNUserNotificationCenterDelegate 的委托

有关详细信息，请访问此博文： iOS Local Notification Tutorial

回复于 2024-04-28T00:38:23+08:00

- (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]];
}

这是有效的，您的应用程序必须使用 -[UIApplication registerUserNotificationSettings:] 注册用户通知才能安排和呈现UILocalNotifications，不要忘记这一点 .

回复于 2024-04-28T00:38:23+08:00

iOS 8及以上用户，请在App委托中包含此功能以使其正常工作 .

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

    return YES;
}

然后添加这行代码会有所帮助，

- (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]];

}

回复于 2024-04-28T00:38:23+08:00

-(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];

回复于 2024-04-28T00:38:23+08:00

如何在iOS中创建本地通知？

6 回答

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