iOS 静默本地推送通知 objective-c ？

Question

我正在寻找实现静默本地推送通知的方法。当用户超出范围时，我想向用户发送静默通知。

Answer 1

已解决。创建本地通知时不要设置以下值。

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

像这样创建本地通知:

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。当应用程序处于后台时，通知中心不会显示任何通知。

iOS10 更新(UNUserNotificationCenter)

在 AppDelegate 中

@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 View Controller 中

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 秒后发送一个静默通知，角标(Badge)计数为 4。