iOS“本地”推送通知
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iOS "Local" Push Notification
提问by Mathias M?nsted
Hey,
嘿，
I'm looking for a way to make "local" push notifications. I can't figure out how I should do this, so I'm looking for some help. What I need is:
我正在寻找一种制作“本地”推送通知的方法。我不知道该怎么做，所以我正在寻求帮助。我需要的是：
- a way to send a notification for a user who haven't opened the application within 24 hours. (Or that an inthavent change)
- 一种向 24 小时内未打开应用程序的用户发送通知的方法。（或者一个int没有改变）
I really hope that one of you got time to help me, thanks!
我真的希望你们中的一个人有时间帮助我，谢谢！
回答by tilo
This is pretty straight forward:
这是非常直接的：
1) When the app is closed, schedule a local notification that will fire in 24 hours
1) 当应用程序关闭时，安排一个将在 24 小时内触发的本地通知
- (void)applicationDidEnterBackground:(UIApplication *)application
{
UILocalNotification *notification = [[UILocalNotification alloc] init];
notification.fireDate = [[NSDate date] dateByAddingTimeInterval:60*60*24];
notification.alertBody = @"24 hours passed since last visit :(";
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
}
2) if the app is opened (before the local notification fires), cancel the local notification
2）如果应用程序打开（在本地通知触发之前），取消本地通知
- (void)applicationDidBecomeActive:(UIApplication *)application
{
[[UIApplication sharedApplication] cancelAllLocalNotifications];
}
回答by Midhun MP
You can use the UILocalNotificationfor this purpose.
为此，您可以使用UILocalNotification。
And implement your UIApplicationapplicationWillTerminateand applicationDidEnterBackgrounddelegates like:
并实现您的UIApplicationapplicationWillTerminate和applicationDidEnterBackground委托，例如：
- (void)applicationWillTerminate:(UIApplication *)application
{
[self scheduleNotification];
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
[self scheduleNotification];
}
- (void)scheduleNotification
{
UILocalNotification *locNot = [[UILocalNotification alloc] init];
locNot.fireDate = [NSDate dateWithTimeIntervalSinceNow:60 * 60 * 24];
[[UIApplication sharedApplication] scheduleLocalNotification: locNot];
}
When you enter to your app you need to cancel this notification. So implement applicationDidBecomeActivelike;
当您进入您的应用程序时，您需要取消此通知。所以实现applicationDidBecomeActive像;
- (void)applicationDidBecomeActive:(UIApplication *)application
{
[[UIApplication sharedApplication] cancelAllLocalNotifications];
}
