iOS无声本地推送通知目标c？ [英] iOS Silent local push notifications objective c?

问题描述

我正在寻找实现静默本地推送通知的方法。我希望在用户超出范围时向用户发送静默通知。

I am searching for way to implement silent local push notifications. I want to send silent notification to user when that user is out of range.

推荐答案

已解决。
创建本地通知时不要设置以下值。

Solved. While creating local notification don't set following values.

notification.alertBody = message;
notification.alertAction = @"Show";
notification.category = @"ACTION"; 
notification.soundName = UILocalNotificationDefaultSoundName;

只需创建这样的本地通知：

Just crate local notification like this:

UILocalNotification *notification = [[UILocalNotification alloc] init];
notification.fireDate = [NSDate date];
NSTimeZone* timezone = [NSTimeZone defaultTimeZone];
notification.timeZone = timezone;
notification.applicationIconBadgeNumber = 4;
[[UIApplication sharedApplication]scheduleLocalNotification:notification];

这将发送本地通知，并且只会将IconBadgeNumber显示为4.通知中心不会显示通知当应用程序在后台时。

This will send local notification and will only display IconBadgeNumber as 4. No notification will be shown in notification center when app is in background.

已更新为iOS10（UNUserNotificationCenter）

在AppDelegate

In AppDelegate

@import UserNotifications;

UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

UNAuthorizationOptions options = UNAuthorizationOptionAlert + UNAuthorizationOptionSound + UNAuthorizationOptionBadge;

[center requestAuthorizationWithOptions:options
                      completionHandler:^(BOOL granted, NSError * _Nullable error) {
                          if (!granted) {
                              NSLog(@"Something went wrong");
                          }
                      }];

在ViewController中

In ViewController

UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

UNMutableNotificationContent *content = [UNMutableNotificationContent new];
//content.title = @"Don't forget";
//content.body = @"Buy some milk";
//content.sound = [UNNotificationSound defaultSound];
content.badge = [NSNumber numberWithInt:4];

UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:15 repeats:NO];


NSString *identifier = @"UniqueId";
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier
                                                                      content:content trigger:trigger];

[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
    if (error != nil) {
        NSLog(@"Something went wrong: %@",error);
    }
}];

这将在15秒后发送无声通知，徽章数为4.

This will send a silent notification after 15 sec with badge count as 4.

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