我进行了很多搜索，试图找到解决这个问题的具体方法。我有一个使用以前的 UILocalNotification 系统发送本地通知的应用程序，这在 iOS 10.3.3 下仍然可以正常工作。但是，我试图将其转换为新的 UNNotification 系统，因为以前的系统已被弃用。无论我尝试使用 UNCalendarNotificationTrigger 还是 UNTimeIntervalNotificationTrigger，代理都不会收到呼叫。这是触发视图控制器的代码。
if (isItTime){
NSCalendar *currentCalendar = [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];
[currentCalendar setTimeZone:[NSTimeZone localTimeZone]];
NSDateComponents *components = [currentCalendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond | NSCalendarUnitTimeZone fromDate:[now dateByAddingTimeInterval:30]];
// components.second = 0;
NSLog(@"trigger components: %@", components);
UNCalendarNotificationTrigger* trigger = [UNCalendarNotificationTrigger
triggerWithDateMatchingComponents:components repeats:NO];
UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@"invite" content:content trigger:trigger];
[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
if (error != nil) {
NSLog(@"Something went wrong: %@",error);
}
}];
[self.currentLocalNotificationRequests addObject:request];
return request;
}else{
return nil;
}
这是委托（appdelegate）didFinishLaunching 的代码：
- (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.
NSLog(@"_prefix:set($class $method $line)");
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"];
};
}];
appdelegate 获取通知的代码：
- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler{
NSLog(@"appdelegate - center didReceiveNotificationResponse");
NSString *actionIdentifier = response.actionIdentifier;
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];
};
}
completionHandler();
}
- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler{
NSLog(@"appdelegate willPresentNotification");
UNNotificationRequest * request = notification.request;
NSString * actionIdentifier = request.identifier;
if([actionIdentifier isEqualToString:UNNotificationDismissActionIdentifier] || [actionIdentifier isEqualToString:UNNotificationDefaultActionIdentifier]){
}else{
if([actionIdentifier isEqualToString:@"invite"]){
NSLog(@"app delegate notification received while in foreground");
}
}
completionHandler(UNNotificationPresentationOptionAlert + UNNotificationPresentationOptionSound);
}
这是触发代码的NSLog：
<NSDateComponents: 0x146d51c0>
TimeZone: America/Chicago (CDT) offset -18000 (Daylight)
Calendar Year: 2017
Month: 10
Leap month: no
Day: 29
Hour: 14
Minute: 3
Second: 4
很明显，系统没有调用 appdelegate 方法（我确实在通知时间之前将应用程序置于后台，所以应该调用了 didReceiveNotification 方法。
如果有人可以提供帮助，我将不胜感激！
此外，viewDidLoad 中的这段代码：
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(receiveNotificationFromAppDelegate:)
name:kAppDelegateNotification
object:nil];
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(applicationBecameActive) name:UIApplicationDidBecomeActiveNotification object:nil];
self.currentLocalNotificationRequests = [[NSMutableArray alloc]init];
/*
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkDndIndicator) name:UIApplicationDidBecomeActiveNotification object:nil];
*/
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.
NSLog(@"request granted");
}];
以及启动触发过程的代码：
-(UNNotificationRequest *)startLocalNotification:(NSDate *)fireDate :
(NSMutableDictionary *)userInfo{
NSUserDefaults *storage = [NSUserDefaults standardUserDefaults];
UNUserNotificationCenter* center = [UNUserNotificationCenter currentNotificationCenter];
[center removeAllPendingNotificationRequests];
UNMutableNotificationContent* content = [[UNMutableNotificationContent alloc] init];
content.title = NSLocalizedString(@"TimeChime Alert", nil);
content.body = NSLocalizedString(@"Click to Stop or Change Timer",nil);
content.categoryIdentifier = @"com.nelsoncapes.localNotification";