Xamarin iOS 本地推送通知 [英] Xamarin iOS Local Push Notifications
问题描述
如何安排本地(无服务器)推送通知(不是警报)从我的应用程序触发?我只是想从我的应用程序中安排一个通知,并在通知中心的给定时间触发它.我曾尝试使用 LocalNotifications,但它们似乎只有在应用程序打开时才有效,并且只有在应用程序关闭时才更新徽章.除非您使用服务器,否则我也无法发送推送通知.
How can I schedule a local (no server) PUSH notification (not an alert) to fire from my app? I simply want to schedule a notification from my app and have it fire at the given time in the notification center. I have tried to use LocalNotifications but they only seem to work if the app is open, and only update the badge if it is closed. I also see no way of sending push notifications unless you use a server.
目前我可以安排 LocalNotification 并弹出警报,但我希望在应用程序关闭时它可以工作,而不是警报,我想要一个在顶部弹出的推送通知.>
Currently I can schedule a LocalNotification and have an alert pop up, but I would like this to work when the app is closed, and instead of an alert, I would like a push notification that pops up at the top.
推荐答案
应在应用启动后立即请求通知权限,方法是将以下代码添加到 AppDelegate 的
并设置所需的通知类型 (FinishedLaunching
方法中UNAuthorizationOptions
):
Notification permission should be requested as soon as the app launches by adding the following code to the FinishedLaunching
method of the AppDelegate
and setting the desired notification type (UNAuthorizationOptions
):
...
using UserNotifications;
...
public override bool FinishedLaunching(UIApplication application, NSDictionary launchOptions)
{
....
//after iOS 10
if(UIDevice.CurrentDevice.CheckSystemVersion(10,0))
{
UNUserNotificationCenter center = UNUserNotificationCenter.Current;
center.RequestAuthorization(UNAuthorizationOptions.Alert | UNAuthorizationOptions.Sound | UNAuthorizationOptions.UNAuthorizationOptions.Badge, (bool arg1, NSError arg2) =>
{
});
center.Delegate = new NotificationDelegate();
}
else if(UIDevice.CurrentDevice.CheckSystemVersion(8, 0))
{
var settings = UIUserNotificationSettings.GetSettingsForTypes(UIUserNotificationType.Alert| UIUserNotificationType.Badge| UIUserNotificationType.Sound,new NSSet());
UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
}
return true;
}
iOS 10 的新功能,当应用程序在前台并触发通知时,它可以以不同的方式处理通知.通过提供UNUserNotificationCenterDelegate
并实现UserNotificationCenter 方法
,应用可以接管显示通知的责任.例如:
New to iOS 10, an app can handle Notifications differently when it is in the foreground and a Notification is triggered. By providing aUNUserNotificationCenterDelegate
and implementing theUserNotificationCentermethod
, the app can take over responsibility for displaying the Notification. For example:
using System;
using ObjCRuntime;
using UserNotifications;
namespace workplat
{
public class NotificationDelegate:UNUserNotificationCenterDelegate
{
public NotificationDelegate()
{
}
public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
{
// Do something with the notification
Console.WriteLine("Active Notification: {0}", notification);
// Tell system to display the notification anyway or use
// `None` to say we have handled the display locally.
completionHandler(UNNotificationPresentationOptions.Alert|UNNotificationPresentationOptions.Sound);
}
public override void DidReceiveNotificationResponse(UNUserNotificationCenter center, UNNotificationResponse response, Action completionHandler)
{
// Take action based on Action ID
switch (response.ActionIdentifier)
{
case "reply":
// Do something
break;
default:
// Take action based on identifier
if (response.IsDefaultAction)
{
// Handle default action...
}
else if (response.IsDismissAction)
{
// Handle dismiss action
}
break;
}
// Inform caller it has been handled
completionHandler();
}
}
}
要在系统中创建和注册自定义操作,请使用以下代码:
To create and register a Custom Action with the system, use the following code:
public void RegisterNotification(long time)
{
UNUserNotificationCenter center = UNUserNotificationCenter.Current;
//creat a UNMutableNotificationContent which contains your notification content
UNMutableNotificationContent notificationContent = new UNMutableNotificationContent();
notificationContent.Title = "xxx";
notificationContent.Body= "xxxx";
notificationContent.Sound = UNNotificationSound.Default;
UNTimeIntervalNotificationTrigger trigger = UNTimeIntervalNotificationTrigger.CreateTrigger(time, false);
UNNotificationRequest request = UNNotificationRequest.FromIdentifier("FiveSecond", notificationContent, trigger);
center.AddNotificationRequest(request,(NSError obj) =>
{
});
}
当你调用这个方法时,例如:
When you call this method ,for emample:
RegisterNotification(20);//set the time you want to push notification
通知将在 20 秒后推送,如果您关闭应用程序.
The notification will been pushed after 20 seconds,enen if you close your app.
我的demo已经上传到我的github,大家可以下载参考:演示链接.
I have upload my demo to my github, you can download it for your reference: Demo Link .
您可以访问链接以获取更多信息和详细信息:微软文档
And you can access the link for more information and details: MicroSoft Document
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