显示基于未按预期工作的通知iOS的UIAlertAction

我已经这样做了好几个小时了，据说我的一切都按它应该的样子进行了，但它并没有调用我的

userNotificationCenter:（UNUserNotificationCenter*）中心
遗嘱提示通知：（未通知*）通知
withCompletionHandler:（void（^）（UNNotificationPresentationOptions））

方法当通知在应用程序中发出时，什么也不会发生

当不在应用程序中时，应用程序会按预期发出通知，但在应用程序中不会发出任何通知

这是我的代码，如果你能看到我做错了什么，请告诉我

类NotificationDelegate.h：

#import <UIKit/UIKit.h>
#import <UserNotifications/UserNotifications.h>

@interface NotificationDelegate : UNUserNotificationCenter <UNUserNotificationCenterDelegate>

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
   willPresentNotification:(UNNotification *)notification
     withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler;

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
     withCompletionHandler:(void (^)())completionHandler;

@end

#import <UIKit/UIKit.h>
#import "NotificationDelegate.h"
@import UserNotifications;

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UNUserNotificationCenter *center;

@property (strong, nonatomic) NotificationDelegate *ncdel;

@property (strong, nonatomic) UIWindow *window;

@end

AppDelegate.h：

#import <UIKit/UIKit.h>
#import <UserNotifications/UserNotifications.h>

@interface NotificationDelegate : UNUserNotificationCenter <UNUserNotificationCenterDelegate>

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
   willPresentNotification:(UNNotification *)notification
     withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler;

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
     withCompletionHandler:(void (^)())completionHandler;

@end

#import <UIKit/UIKit.h>
#import "NotificationDelegate.h"
@import UserNotifications;

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UNUserNotificationCenter *center;

@property (strong, nonatomic) NotificationDelegate *ncdel;

@property (strong, nonatomic) UIWindow *window;

@end

ViewController.m：

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.pvHelper = [[PickerViewHelperViewController alloc] init];
    self.pickerView.dataSource = self.pvHelper;
    self.pickerView.delegate = self.pvHelper;
    self.pvHelper.answer = [NSNumber numberWithInteger:10];

}

- (void) requestPermission{
    UNAuthorizationOptions options = UNAuthorizationOptionAlert + UNAuthorizationOptionSound + UNAuthorizationOptionBadge;
    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    [center requestAuthorizationWithOptions:options
                          completionHandler:^(BOOL granted, NSError * _Nullable error) {
                              if (!granted) {
                                  NSLog(@"Something went wrong");
                              }
                          }];
}


- (void) createNotification:(NSNumber *)time{
    UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];
    content.title = [NSString localizedUserNotificationStringForKey:@"Alarming, isn't it?" arguments:nil];
    content.body = [NSString localizedUserNotificationStringForKey:@"Listen to me my love" arguments:nil];
    content.sound = [UNNotificationSound defaultSound];
    content.badge = [NSNumber numberWithInteger:99];

    UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:[time integerValue]
                                                                                                    repeats:NO];

    //Note: Calling addNotificationRequest with the same identifier string will replace the existing notification. If you want to schedule multiple requests use a different identifier each time.
    NSString *identifier = @"Alarm Triggered";
    UNNotificationRequest *req = [UNNotificationRequest requestWithIdentifier:identifier content:content trigger:trigger];
    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    [center addNotificationRequest:req withCompletionHandler:^(NSError * _Nullable error) {
        if(error != nil){
            NSLog(@"Something went wrong: %@", error);
        }
        else{
            NSLog(@"I have requested the Notification be made");
        }

    }];




}

- (IBAction)buttonTappedSetAlarm:(id)sender {
    [self requestPermission];

    [self createNotification: [[self pvHelper] answer]];
}

这并不重要，但我的单视图应用程序只有一个10、20、30…60秒、分钟、小时的选择器，我会计算出请求的时间

正如我所说的，请求在应用程序之外正常工作，但是应用程序在前台，什么也没有发生，这真的让我很困扰

---

任何帮助都将不胜感激

我知道怎么做了

我不再试图在另一个类中实现

UNUserNotificationCenterDelegate

，而是在我的视图控制器中实现了它：

#import <UIKit/UIKit.h>
#import "PickerViewHelperViewController.h"
@import UserNotifications;

@interface ViewController : UIViewController <UNUserNotificationCenterDelegate>

@property (weak, nonatomic) IBOutlet UIPickerView *pickerView;

@property (strong, nonatomic) PickerViewHelperViewController *pvHelper;

// Two methods needed to implement from the UNUserNotificationCenterDelegate
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
       willPresentNotification:(UNNotification *)notification
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler;

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
         withCompletionHandler:(void (^)())completionHandler;

@end

我上面的创建通知和请求权限方法在代码中保持不变

---

这允许在应用程序中显示本地通知，如果通过通知打开应用程序，则会显示通知

我知道怎么做了

我不再试图在另一个类中实现

UNUserNotificationCenterDelegate

，而是在我的视图控制器中实现了它：

#import <UIKit/UIKit.h>
#import "PickerViewHelperViewController.h"
@import UserNotifications;

@interface ViewController : UIViewController <UNUserNotificationCenterDelegate>

@property (weak, nonatomic) IBOutlet UIPickerView *pickerView;

@property (strong, nonatomic) PickerViewHelperViewController *pvHelper;

// Two methods needed to implement from the UNUserNotificationCenterDelegate
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
       willPresentNotification:(UNNotification *)notification
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler;

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
         withCompletionHandler:(void (^)())completionHandler;

@end

我上面的创建通知和请求权限方法在代码中保持不变

这允许在应用程序中显示本地通知，如果通过通知打开应用程序，则会显示通知