我有一个应用程序，它通过UNNotification本地通知每x分钟提醒用户一次。 如果用户没有响应，iOS 锁屏会显示一系列横幅，要求用户响应。 大多数情况下，当用户点击横幅(点击主页按钮后(会在应用处于后台时触发 UNNotification 中心委派。 但是，有时用户点击最新横幅不会触发委派e。注意：这不是关于没有用户点击的代表无法接收呼叫的问题：我知道这无法做到。为什么当用户点击横幅中的操作按钮时，iOS 不会偶尔触发应用委托？注意：我会跟踪待处理的本地通知的数量，并且永远不会超过系统限制 64。
应用委托：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
UNUserNotificationCenter* center = [UNUserNotificationCenter currentNotificationCenter];
center.delegate = self;
[center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound)
completionHandler:^(BOOL granted, NSError * _Nullable error) {
// Enable or disable features based on authorization.
NSUserDefaults *storage = [NSUserDefaults standardUserDefaults];
if(granted == YES){
[storage setBool:YES forKey:@"permission granted"];
[storage setBool:YES forKey:@"alert permission granted"];
[storage setBool:YES forKey:@"sound permission granted"];
}else{
NSLog(@"No permission granted");
[storage setBool:NO forKey:@"permission granted"];
};
}];
}
#pragma mark UNNotificationCenter setup
UNNotificationAction *acceptAction = [UNNotificationAction actionWithIdentifier:@"ACCEPT_IDENTIFIER" title:NSLocalizedString(@"Continue notifications", nil) options:UNNotificationActionOptionAuthenticationRequired];
UNNotificationAction *declineAction = [UNNotificationAction actionWithIdentifier:@"DECLINE_IDENTIFIER" title:NSLocalizedString(@"Stop notifications", nil) options:UNNotificationActionOptionAuthenticationRequired];
UNNotificationAction *doNotDisturbAction = [UNNotificationAction actionWithIdentifier:@"DO_NOT_DISTURB_IDENTIFIER" title:NSLocalizedString(@"Start Do Not Disturb", nil) options:UNNotificationActionOptionAuthenticationRequired];
NSArray *actions = [NSArray arrayWithObjects:acceptAction, declineAction, doNotDisturbAction, nil];
// NSArray *intentIdentifiers = [NSArray arrayWithObjects:@"none", nil];
UNNotificationCategory *invite = [UNNotificationCategory categoryWithIdentifier:@"com.nelsoncapes.localNotification" actions:actions intentIdentifiers: @[] options:UNNotificationCategoryOptionNone];
NSSet *categories = [NSSet setWithObjects:invite, nil];
[center setNotificationCategories:categories];
[center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound)
completionHandler:^(BOOL granted, NSError * _Nullable error) {
// Enable or disable features based on authorization.
}];
#pragma mark UNNotification received in background
- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler{
[center getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
NSLog(@"notification settings were changed");
NSUserDefaults *storage = [NSUserDefaults standardUserDefaults];
[storage setBool:YES forKey:KEventLoggerEventNotificationSettingsChanged];
[storage synchronize];
if (settings.authorizationStatus != UNAuthorizationStatusAuthorized) {
// Notifications not allowed
NSLog(@"notification settings were changed");
item.eventDescription = KEventLoggerEventNotificationsNotAllowed;
// check settings for alert and sound
}
// UNNotificationSetting alertSetting = settings.alertSetting;
if(settings.alertSetting == UNNotificationSettingEnabled){
[storage setBool:YES forKey:@"alert permission granted"];
item.eventDescription = KEventLoggerEventAlertsAreAllowed;
}else{[storage setBool:NO forKey:@"alert permission granted"];
item.eventDescription = KEventLoggerEventAlertsAreNotAllowed;
}
if (settings.soundSetting == UNNotificationSettingEnabled){
[storage setBool:YES forKey:@"sound permission granted"];
item.eventDescription = KEventLoggerEventSoundsAreAllowed;
}else {[storage setBool:NO forKey:@"sound permission granted"];
item.eventDescription = KEventLoggerEventSoundsAreNotAllowed;
}
}];
NSLog(@"appdelegate - center didReceiveNotificationResponse");
UNNotification *notification = response.notification;
if([actionIdentifier isEqual:@"com.apple.UNNotificationDefaultActionIdentifier"] || [actionIdentifier isEqual:@"com.apple.UNNotificationDismissActionIdentifier"]){
}else{
BOOL accept = [actionIdentifier isEqual:@"ACCEPT_IDENTIFIER"];
BOOL stop = [actionIdentifier isEqual:@"DECLINE_IDENTIFIER"];
BOOL doNotDisturb = [actionIdentifier isEqual:@"DO_NOT_DISTURB_IDENTIFIER"];
if (accept){NSLog(@"accept");
[self handleAcceptActionWithNotification:notification];
}
else if (stop){NSLog(@"stop");
[self handleDeclineActionWithNotification:notification];
}
else if(doNotDisturb) {NSLog(@"do not disturb");
[self handleDoNotDisturbActionWithNotification:notification];
};
}
视图控制器：
-(UNNotificationRequest *)triggerNotifications: (NSString *)identifier : (NSTimeInterval) interval{
// Note: identifier must be unique or else each new request causes all others to be cancelled.
UNUserNotificationCenter* center = [UNUserNotificationCenter currentNotificationCenter];
UNMutableNotificationContent* content = [[UNMutableNotificationContent alloc] init];
content.title = NSLocalizedString(@"Timer expired", nil);
content.body = NSLocalizedString(@"Touch to continue", nil);
NSUserDefaults *storage = [NSUserDefaults standardUserDefaults];
BOOL sound = [storage boolForKey:@"sound permission granted"];
if(sound){
if([self.selectedSound isEqual:NSLocalizedString(kselectedSoundKeyDoorBell, nil)]){
content.sound = [UNNotificationSound soundNamed:@"doorbell.caf"];
}else if ([self.selectedSound isEqual:NSLocalizedString(kselectedSoundKeySystemDefault, nil)]){
content.sound = [UNNotificationSound defaultSound];
}else if ([self.selectedSound isEqual:NSLocalizedString(kselectedSoundKeyElectronicChime, nil)]){
content.sound = [UNNotificationSound soundNamed:@"electronic_chime.caf"];
}else{
if([self.selectedSound isEqual:NSLocalizedString(kselectedSoundKeyComputer, nil)]){
content.sound = [UNNotificationSound soundNamed:@"Computer.caf"];
}
}
}
content.categoryIdentifier = @"com.nelsoncapes.localNotification";
NSDate *today = [NSDate date];
NSDate *fireDate = [today dateByAddingTimeInterval:interval];
// first extract the various components of the date
NSCalendar *calendar = [NSCalendar currentCalendar];
NSInteger year = [calendar component:NSCalendarUnitYear fromDate:fireDate];
NSInteger month = [calendar component:NSCalendarUnitMonth fromDate:fireDate];
NSInteger day = [calendar component:NSCalendarUnitDay fromDate:fireDate];
NSInteger hour = [calendar component:NSCalendarUnitHour fromDate:fireDate];
NSInteger minute = [calendar component:NSCalendarUnitMinute fromDate:fireDate];
NSDateComponents *components = [[NSDateComponents alloc]init];
components.year = year;
components.month = month;
components.day = day;
components.hour = hour;
components.minute = minute;
// construct a calendarnotification trigger and add it to the system
UNCalendarNotificationTrigger *trigger = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:components repeats:NO];
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier: identifier content:content trigger:trigger];
[center addNotificationRequest:request withCompletionHandler:^(NSError *error){
if(error){
NSLog(@"error on trigger notification %@", error);
}
}];
}
我相信我发现了问题(它在我的代码中(。我使用相同的日期组件调用了两次 triggerNotification(我只对分钟粒度感兴趣，因为我使用它在第 x 分钟触发警报(。第一次调用是在用户按下开始按钮时，第二次调用是在应用委托中调用 applicationDidBecomeActive 时。事实上，我确实在表格中看到重复的通知。我认为，但无法显示，当系统有两个针对同一日期组件的 UNNotificationRequests 挂起时，它只会响应相应的警报横幅之一。因此，当我点击最新的横幅时，代表没有被召唤。我删除了第二个触发器，问题似乎已解决(即，点击横幅中的按钮会导致呼叫我的代表(。注意：即使我为同一日期组件触发了两次通知，我确实在每个请求中提供了一个唯一标识符(。